test

detect MCU flash size to config diff usart
add tmp112a code
2025-08-21 17:12:04 +08:00 · 2025-08-21 00:39:30 +08:00 · 2025-08-18 00:18:21 +08:00 · 2025-08-17 18:01:01 +08:00 · 2025-08-17 03:10:50 +08:00 · 2025-08-17 03:06:46 +08:00
31 changed files with 3381 additions and 185 deletions
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -4,6 +4,10 @@
        "Git Bash": {
            "path": "C:\\Program Files\\Git\\bin\\bash.exe",
            "icon": "terminal-bash"
+        },
+        "Git-Bash": {
+            "path": "D:\\Git\\bin\\bash.exe",
+            "icon": "terminal-bash"
        }
    },
    "terminal.integrated.defaultProfile.windows": "Git-Bash",
@@ -15,6 +19,12 @@
    "vcpkg.storageLocation": "C:\\Dev\\Tools\\vcpkg",
    "files.associations": {
        "*.h": "c",
-        "*.c": "c"
+        "*.c": "c",
+        "array": "c",
+        "string": "c",
+        "string_view": "c",
+        "ranges": "c",
+        "span": "c"
    },
+    "cortex-debug.variableUseNaturalFormat": true,
 }
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -11,7 +11,11 @@
                "Build",
                "Flash MCU"
            ],
-            "dependsOrder": "sequence"
+            "dependsOrder": "sequence",
+            "icon": {
+                "id": "insert",
+                "tooltip": "Build and Flash"
+            }
        },
        {
            "label": "Flash MCU",
@@ -31,6 +35,10 @@
            },
            "presentation": {
                "clear": true
+            },
+            "icon": {
+                "id": "gather",
+                "tooltip": "Flash MCU"
            }
        },
        {
@@ -51,6 +59,10 @@
            },
            "presentation": {
                "clear": true
+            },
+            "icon": {
+                "id": "discard",
+                "tooltip": "Reset MCU"
            }
        },
        {
@@ -71,6 +83,10 @@
            },
            "presentation": {
                "clear": true
+            },
+            "icon": {
+                "id": "clear-all",
+                "tooltip": "Erase MCU"
            }
        },
        {
@@ -119,6 +135,10 @@
            },
            "presentation": {
                "clear": true
+            },
+            "icon": {
+                "id": "code",
+                "tooltip": "Build"
            }
        }
    ]
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,12 @@ set(TARGET_SRC
    # Add new source files here
    Src/uart.c
    Src/led.c
+    Src/uart_ring_buffer.c
+    Src/command.c
+    Src/i2c.c
+    Src/ldc1612.c
+    Src/tmp112.c
+    Src/board_config.c
 )

 # 设置输出目录
--- a/CMakePresets.json
+++ b/CMakePresets.json
@@ -12,6 +12,7 @@
                    "type": "FILEPATH",
                    "value": "${sourceDir}/cmake/arm-none-eabi-gcc.cmake"
                }
+                   ,"CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
            },
            "architecture": {
                "value": "unspecified",
--- a/Inc/board_config.h
+++ b/Inc/board_config.h
@@ -1,12 +1,80 @@
 #ifndef BOARD_CONFIG_H
 #define BOARD_CONFIG_H

+#define GD32E23XF4          0x10
+#define GD32E23XF6          0x20
+#define GD32E23XF8          0x40
+
+/* >>>>>>>>>>>>>>>>>>>>[RS485 PHY DEFINE]<<<<<<<<<<<<<<<<<<<< */
+
+// #define RS485_MAX13487 // RS485 PHY : MAX13487 (AutoDir)
+#undef  RS485_MAX13487 // RS485 PHY : SP3487 (no AutoDir)
+
+/* >>>>>>>>>>>>>>>>>>>>[IIC TYPE DEFINE]<<<<<<<<<<<<<<<<<<<< */
+
+// #define SOFTWARE_IIC // IIC Type : Software IIC
+#undef  SOFTWARE_IIC // IIC Type : Hardware IIC
+
+/* >>>>>>>>>>>>>>>>>>>>[DEBUG ASSERTIONS DEFINE]<<<<<<<<<<<<<<<<<<<< */
+
+// #define DEBUG_VERBOSE // Debug Assertions Status : Debug Verbose Information
+#undef  DEBUG_VERBOSE // Debug Assertions Status : No Debug Verbose Information
+
+/* >>>>>>>>>>>>>>>>>>>>[EDDY DRIVE CURRENT DETECTION]<<<<<<<<<<<<<<<<<<<< */
+
+// #define EDDY_DRIVE_CURRENT_DETECTION // Eddy Drive Current Detection : Enable
+#undef  EDDY_DRIVE_CURRENT_DETECTION // Eddy Drive Current Detection : Disable
+
 /******************************************************************************/

+/* Dynamic USART Configuration Structure */
+typedef struct {
+    uint32_t rcu_usart;
+    uint32_t usart_periph;
+    IRQn_Type irq_type;
+    void (*irq_handler)(void);  // 函数指针：指向中断处理函数
+} usart_config_t;
+
+extern usart_config_t g_usart_config;
+extern uint8_t g_mcu_flash_size;
+
+/* USART中断处理函数声明 */
+void usart0_irq_handler(void);
+void usart1_irq_handler(void);
+
+/******************************************************************************/
+
+#define RCU_GPIO_I2C         RCU_GPIOF
+#define RCU_I2C              RCU_I2C0
+#define I2C_SCL_PORT         GPIOF
+#define I2C_SCL_PIN          GPIO_PIN_1
+#define I2C_SDA_PORT         GPIOF
+#define I2C_SDA_PIN          GPIO_PIN_0
+#define I2C_GPIO_AF          GPIO_AF_1
+
+#define I2C_DEBUG_UART       USART0
+
+/******************************************************************************/
+
+#define LED_RCU              RCU_GPIOA
 #define LED_PORT             GPIOA
 #define LED_PIN              GPIO_PIN_7
-#define LED_RCU              RCU_GPIOA

 /******************************************************************************/

+#define RS485_RCU            (g_usart_config.rcu_usart)
+#define RS485_PHY            (g_usart_config.usart_periph)
+#define RS485_IRQ            (g_usart_config.irq_type)
+#define RS485_GPIO_RCU       RCU_GPIOA
+#define RS485_GPIO_PORT      GPIOA
+#define RS485_EN_PIN         GPIO_PIN_1
+#define RS485_TX_PIN         GPIO_PIN_2
+#define RS485_RX_PIN         GPIO_PIN_3
+#define RS485_BAUDRATE       115200U
+
+/******************************************************************************/
+
+void mcu_detect_and_config(void);
+uint8_t get_flash_size(void);
+
 #endif //BOARD_CONFIG_H
--- a/Inc/command.h
+++ b/Inc/command.h
@@ -0,0 +1,128 @@
+/**
+ * @file command.h
+ * @brief 串口命令解析与处理模块接口声明。
+ * @details 提供基于环形缓冲区的串口协议解析、命令处理及状态管理功能，
+ *          支持格式为 D5 03 LEN [cmd] CRC 的命令帧解析与响应。
+ */
+#ifndef COMMAND_H
+#define COMMAND_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/**
+ * @defgroup Command 命令处理模块
+ * @brief 串口命令解析与处理
+ * @{
+ */
+
+/** @brief 传感器周期上报使能标志 */
+extern volatile bool g_eddy_current_sensor_report_enabled;
+extern volatile bool g_temperature_sensor_report_enabled;
+
+/**
+ * @section Command_Protocol 协议格式
+ * 接收命令帧格式：
+ * @code
+ * [0] HEADER = 0xD5        // 包头标识
+ * [1] BOARD_TYPE = 0x03    // 板卡类型标识  
+ * [2] LEN = 数据区字节数    // 有效载荷长度
+ * [3..(3+LEN-1)] 数据      // 命令数据
+ * [last] CRC               // 校验码（从索引1累加到len-2的低8位）
+ * @endcode
+ * 
+ * 响应帧格式：
+ * @code
+ * [0] HEADER = 0xB5        // 响应包头
+ * [1] TYPE                 // 响应类型（0xF0=成功，0xF1..=错误类型）
+ * [2] LEN                  // 响应数据长度
+ * [3..(3+LEN-1)] 数据      // 响应数据
+ * [last] CRC               // 校验码
+ * @endcode
+ *
+ * @section Command_Usage 使用说明
+ * 1) 初始化环形缓冲区：
+ * @code{.c}
+ * uart_ring_buffer_init();
+ * @endcode
+ *
+ * 2) 在主循环中调用命令处理：
+ * @code{.c}
+ * while(1) {
+ *     command_process();  // 处理接收到的命令
+ *     // 其他业务逻辑
+ * }
+ * @endcode
+ *
+ * 3) 查询传感器上报状态：
+ * @code{.c}
+ * if(get_sensor_report_enabled()) {
+ *     // 执行传感器数据上报
+ * }
+ * @endcode
+ */
+
+/**
+ * @brief 获取电涡流传感器周期上报使能状态。
+ * @return bool 上报状态。
+ * @retval true  传感器周期上报已启用。
+ * @retval false 传感器周期上报已禁用。
+ * @ingroup Command
+ */
+bool get_eddy_sensor_report_enabled(void);
+
+/**
+ * @brief 设置电涡流传感器周期上报使能状态。
+ * @param enabled 上报使能标志。
+ * @arg true  启用传感器周期上报。
+ * @arg false 禁用传感器周期上报。
+ * @note 推荐通过此函数修改状态，便于后续功能扩展。
+ * @ingroup Command
+ */
+void set_eddy_sensor_report_status(bool enabled);
+
+/**
+ * @brief 获取温度传感器周期上报使能状态。
+ * @return bool 上报状态。
+ * @retval true  传感器周期上报已启用。
+ * @retval false 传感器周期上报已禁用。
+ * @ingroup Command
+ */
+bool get_temp_sensor_report_enabled(void);
+
+/**
+ * @brief 设置温度传感器周期上报使能状态。
+ * @param enabled 上报使能标志。
+ * @arg true  启用传感器周期上报。
+ * @arg false 禁用传感器周期上报。
+ * @note 推荐通过此函数修改状态，便于后续功能扩展。
+ * @ingroup Command
+ */
+void set_temp_sensor_report_status(bool enabled);
+
+/**
+ * @brief 处理串口环形缓冲区中的命令数据。
+ * @details 基于状态机的非阻塞协议解析器，处理完整的命令帧并自动响应。
+ *          每次调用处理缓冲区中所有可用数据，遇到错误时自动重置状态机。
+ * @note 使用静态变量维护解析状态，函数不可重入。
+ * @warning 依赖环形缓冲区正确实现，建议在主循环中周期调用。
+ * @ingroup Command
+ */
+void command_process(void);
+
+/**
+ * @brief 解析并处理完整的命令帧。
+ * @param cmd 指向完整命令帧的缓冲区（从包头0xD5开始）。
+ * @param len 命令帧总长度（字节）。
+ * @note 内部函数，由 command_process() 调用，一般不直接使用。
+ * @ingroup Command
+ */
+void handle_command(const uint8_t *cmd, uint8_t len);
+
+/** @} */ // end of Command group
+
+void eddy_current_report(void);
+
+void temperature_raw_value_report(void);
+
+#endif // COMMAND_H
--- a/Inc/i2c.h
+++ b/Inc/i2c.h
@@ -0,0 +1,127 @@
+//
+// Created by dell on 24-12-20.
+//
+
+#ifndef I2C_H
+#define I2C_H
+
+#include "gd32e23x_it.h"
+#include "gd32e23x.h"
+#include "systick.h"
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "board_config.h"
+
+/******************************************************************************/
+
+#define I2C_SPEED           100000U         /* 100kHz */
+#define I2C_TIME_OUT        5000U           /* 5000 loops timeout */
+#define I2C_MAX_RETRY       3U              /* Maximum retry attempts */
+#define I2C_DELAY_10US      10U             /* Delay in microseconds for bus reset */
+#define I2C_RECOVERY_CLOCKS 9U              /* Clock pulses for bus recovery */
+#define I2C_MASTER_ADDRESS  0x00U           /* Master address (not used) */
+
+/* Legacy compatibility */
+#define I2C_OK              1
+#define I2C_FAIL            0
+#define I2C_END             1
+
+/******************************************************************************/
+
+/* I2C result enumeration */
+typedef enum {
+    I2C_RESULT_SUCCESS = 0,     /* Operation successful */
+    I2C_RESULT_TIMEOUT,         /* Timeout occurred */
+    I2C_RESULT_NACK,            /* No acknowledge received */
+    I2C_RESULT_BUS_BUSY,        /* Bus is busy */
+    I2C_RESULT_ERROR,           /* General error */
+    I2C_RESULT_INVALID_PARAM,   /* Invalid parameter */
+    I2C_RECOVERY_OK,
+    I2C_RECOVERY_SDA_STUCK_LOW,
+    I2C_RECOVERY_SCL_STUCK_LOW
+} i2c_result_t;
+
+/* I2C state machine enumeration */
+typedef enum {
+    I2C_STATE_IDLE = 0,         /* Idle state */
+    I2C_STATE_START,            /* Generate start condition */
+    I2C_STATE_SEND_ADDRESS,     /* Send slave address */
+    I2C_STATE_CLEAR_ADDRESS,    /* Clear address flag */
+    I2C_STATE_TRANSMIT_REG,     /* Transmit register address */
+    I2C_STATE_TRANSMIT_DATA,    /* Transmit data */
+    I2C_STATE_RESTART,          /* Generate restart condition */
+    I2C_STATE_RECEIVE_DATA,     /* Receive data */
+    I2C_STATE_STOP,             /* Generate stop condition */
+    I2C_STATE_ERROR,            /* Error state */
+    I2C_STATE_END
+} i2c_state_t;
+
+/******************************************************************************/
+
+
+/* Function declarations */
+/*!
+    \brief      configure the I2C interface
+    \param[in]  none
+    \param[out] none
+    \retval     i2c_result_t
+*/
+i2c_result_t i2c_config(void);
+
+/*!
+    \brief      reset I2C bus with proper recovery
+    \param[in]  none
+    \param[out] none
+    \retval     i2c_result_t
+*/
+i2c_result_t i2c_bus_reset(void);
+
+/*!
+    \brief      scan I2C bus for devices
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void i2c_scan(void);
+
+/*!
+    \brief      write 16-bit data to I2C device
+    \param[in]  slave_addr: 7-bit slave address
+    \param[in]  reg_addr: register address
+    \param[in]  data: pointer to 2-byte data array
+    \param[out] none
+    \retval     i2c_result_t
+*/
+i2c_result_t i2c_write_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t data[2]);
+
+/*!
+    \brief      read 16-bit data from I2C device
+    \param[in]  slave_addr: 7-bit slave address
+    \param[in]  reg_addr: register address
+    \param[out] data: pointer to 2-byte data buffer
+    \retval     i2c_result_t
+*/
+i2c_result_t i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data);
+
+/*!
+    \brief      read 16-bit data from I2C device
+    \param[in]  slave_addr: 7-bit slave address
+    \param[in]  reg_addr: register address
+    \param[out] data: pointer to 2-byte data buffer
+    \retval     i2c_result_t
+*/
+i2c_result_t i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data);
+
+/*!
+    \brief      get status string for debugging
+    \param[in]  status: i2c_result_t value
+    \param[out] none
+    \retval     const char* status string
+*/
+const char* i2c_get_status_string(i2c_result_t status);
+
+#endif //I2C_H
--- a/Inc/ldc1612.h
+++ b/Inc/ldc1612.h
@@ -0,0 +1,213 @@
+//
+// Created by dell on 24-12-3.
+//
+
+#ifndef LDC1612_H
+#define LDC1612_H
+
+#include "gd32e23x_it.h"
+#include "gd32e23x.h"
+#include "systick.h"
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "board_config.h"
+#include "i2c.h"
+
+/***************************************************************************/
+
+/* IIC Interface Selection */
+#ifdef SOFTWARE_IIC
+    #define LDC1612_IIC_WRITE_16BITS(addr, reg, data)    soft_i2c_write_16bits(addr, reg, data)
+    #define LDC1612_IIC_READ_16BITS(addr, reg, data)     soft_i2c_read_16bits(addr, reg, data)
+    #define LDC1612_IIC_TYPE_STR                         "Software IIC"
+#else
+    #define LDC1612_IIC_WRITE_16BITS(addr, reg, data)    i2c_write_16bits(addr, reg, data)
+    #define LDC1612_IIC_READ_16BITS(addr, reg, data)     i2c_read_16bits(addr, reg, data)
+    #define LDC1612_IIC_TYPE_STR                         "Hardware IIC"
+#endif
+
+/***************************************************************************/
+
+#define LDC1612_ADDR         (0x2B)
+
+/************************Register Addr***************************************/
+
+#define CONVERTION_RESULT_REG_START             0X00
+#define SET_CONVERSION_TIME_REG_START           0X08
+#define SET_CONVERSION_OFFSET_REG_START         0X0C
+#define SET_SETTLECOUNT_REG_START               0X10
+#define SET_FREQ_REG_START                      0X14
+
+#define SENSOR_STATUS_REG                       0X18
+#define ERROR_CONFIG_REG                        0X19
+#define SENSOR_CONFIG_REG                       0X1A
+#define MUX_CONFIG_REG                          0X1B
+#define SENSOR_RESET_REG                        0X1C
+#define SET_DRIVER_CURRENT_REG                  0X1E
+
+#define READ_MANUFACTURER_ID                    0X7E
+#define READ_DEVICE_ID                          0X7F
+
+/**********************Sensor Channel****************************************/
+
+#define CHANNEL_0  0
+#define CHANNEL_1  1
+
+/*************************MUX_CONFIG********************************************
+ * 0x0209 AutoScanEN: 0 / RR_SEQ: 00 / RESERVED: 0 0010 0000 1 / Deglitch: 001(  1MHz)
+ * 0x020C AutoScanEN: 0 / RR_SEQ: 00 / RESERVED: 0 0010 0000 1 / Deglitch: 100(3.3MHz)
+ * 0x020D AutoScanEN: 0 / RR_SEQ: 00 / RESERVED: 0 0010 0000 1 / Deglitch: 100( 10MHz)
+ * 0x020F AutoScanEN: 0 / RR_SEQ: 00 / RESERVED: 0 0010 0000 1 / Deglitch: 100( 33MHz)
+*/
+#define LDC1612_MUX_CONFIG                 0x020C
+
+/***********************SENSOR_CONFIG********************************************
+ * 0x1601 Active CH0: 00 / SLEEP: 0 / OVERDRIVE: 1 / LowPowerMode: 0 / AutoAmpDis 1 / CLK(ext): 1 / RESERVED: 0 / INTB_Dis : 0 / HighCurrent: 0 / RESERVED: 00 0001
+ * 0x1201 Active CH0: 00 / SLEEP: 0 / OVERDRIVE: 1 / LowPowerMode: 0 / AutoAmpDis 0 / CLK(ext): 1 / RESERVED: 0 / INTB_Dis : 0 / HighCurrent: 0 / RESERVED: 00 0001
+ * 0x1641 Active CH0: 00 / SLEEP: 0 / OVERDRIVE: 1 / LowPowerMode: 0 / AutoAmpDis 1 / CLK(ext): 1 / RESERVED: 0 / INTB_Dis : 0 / HighCurrent: 1 / RESERVED: 00 0001
+ * 0x1241 Active CH0: 00 / SLEEP: 0 / OVERDRIVE: 1 / LowPowerMode: 0 / AutoAmpDis 0 / CLK(ext): 1 / RESERVED: 0 / INTB_Dis : 0 / HighCurrent: 1 / RESERVED: 00 0001
+*/ 
+
+#ifdef EDDY_DRIVE_CURRENT_DETECTION
+    #define LDC1612_SENSOR_CONFIG_CH0      0x1241
+#else
+    #define LDC1612_SENSOR_CONFIG_CH0      0x1641
+#endif
+#define LDC1612_SLEEP_MODE                 0x2801
+
+/****************************CONVERSION_TIME************************************
+ * Freq_ref = 40MHz / CHx_FREF_DIVIDER
+ * ******RCOUNT_CHx*******
+ * Reference Count Conversion Interval Time
+ * 0x0005 ~ 0xFFFF
+ * default: 0x0080
+ * RCOUNT_CHx * 16 / Freq_ref = Conversion Interval Time
+ * 
+ * ******SETTLECOUNT_CHx*******
+ * Conversion Settling Time
+ * 0x0000 ~ 0xFFFF
+ * default: 0x0000
+ * SETTLECOUNT_CHx * 16 / Freq_ref = Conversion Settling Time
+ * 0x1000 4096*16个时钟周期
+ * 0x0100 256*16个时钟周期
+ * 0x0000/0x0001 32*16个时钟周期
+ * 
+ * ******RCOUNT_CHx*******
+*/
+#define LDC1612_RCOUNT_TIME_CH0            0x1000 // 0x1000=4096个时钟周期
+#define LDC1612_SETTLECOUNT_CH0            0x0100
+
+/**************************DRIVE_CURRENT****************************************
+ * 0xA000 CH_IDRIVE: 1010 0 / CH_INIT_IDRIVE: 000 00 / RESERVED: 00 0000
+ * 0x9000 CH_IDRIVE: 1001 0 / CH_INIT_IDRIVE: 000 00 / RESERVED: 00 0000
+ * CH_INIT_IDRIVE will update when every conversion systick ==>AutoAmpDis is 0
+ * CH_INIT_IDRIVE will store init drive current calculated ==> AutoAmpDis is 1
+*/  
+#define LDC1612_DRIVE_CURRENT              0x9000
+
+/**************************SENSOR_CONFIG***************************************/
+
+
+
+/**************************ERROR_CONFIG****************************************
+ * [15] Under-Range ERR to OUT (DATA_CHx.CHx_ERR_UR)
+ * [14] Over-Range ERR to OUT (DATA_CHx.CHx_ERR_OR)
+ * [13] Watchdog-Timeout ERR to OUT (DATA_CHx.CHx_ERR_WD)
+ * [12] Amplitude-High-Error ERR to OUT (DATA_CHx.CHx_ERR_AE)
+ * [11] Amplitude-Low-Error ERR to OUT (DATA_CHx.CHx_ERR_AE)
+ * [10] RESERVED
+ * [ 9] RESERVED
+ * [ 8] RESERVED
+ * [ 7] Under-Range ERR to INTB (STATUS.ERR_UR)
+ * [ 6] Over-Range ERR to INTB (STATUS.ERR_OR)
+ * [ 5] Watchdog-Timeout ERR to INTB (STATUS.ERR_WD)
+ * [ 4] Amplitude-High-Error ERR to INTB (STATUS.ERR_AHE)
+ * [ 3] Amplitude-Low-Error ERR to INTB (STATUS.ERR_ALE)
+ * [ 2] Zero_Count_Error ERR to INTB (STATUS.ERR_ZC)
+ * [ 1] RESERVED
+ * [ 0] Data_Ready_Flag to INTB (STATUS.DRDY)
+ * 
+ * 0x0000 No ERR to OUT or INTB
+*/
+
+#define LDC1612_ERROR_CONFIG               0x0000
+
+/**************************STATUS****************************************
+ * [15] 
+ * [14] Error Channel 0b00: CH0 / 0b01: CH1 / 0b10: CH2 / 0b11: CH3
+ * [13] Conversion Under-Range Error 0b0: No / 0b1: Yes
+ * [12] Conversion Over-Range Error 0b0: No / 0b1: Yes
+ * [11] Watchdog Timeout Error 0b0: No / 0b1: Yes
+ * [10] Amplitude High Error 0b0: No / 0b1: Yes
+ * [ 9] Amplitude Low Error 0b0: No / 0b1: Yes
+ * [ 8] Zero Count Error 0b0: No / 0b1: Yes
+ * [ 7] RESERVED
+ * [ 6] Ddata Ready Flag 0b0: No new results / 0b1: New results available
+ * [ 5] RESERVED
+ * [ 4] RESERVED
+ * [ 3] CH0 Unread Conversion Result 0b0: No / 0b1: Yes(DATA_CH0)
+ * [ 2] CH1 Unread Conversion Result 0b0: No / 0b1: Yes(DATA_CH1)
+ * [ 1] CH2 Unread Conversion Result 0b0: No / 0b1: Yes(DATA_CH2)
+ * [ 0] CH3 Unread Conversion Result 0b0: No / 0b1: Yes(DATA_CH3)
+ * 
+ * 0x0000 No ERR to OUT or INTB
+*/
+
+/*****************CONVERSION_OFFSET_CONFIG****************************************/
+
+#define SET_CONVERSION_OFFSET_CH0          0x0000 
+
+/***********************RESET DEVICE********************************************
+0x8000 RESET_DEV: 1 / RESERVED: 000 0000 0000 0000
+*/ 
+
+#define LDC1612_RESET_DEV                  0x8000 //[15:0] 0b1000 0000 0000 0000
+
+/***********************IDs****************************************************/
+
+#define LDC1612_MANUFACTURER_ID            0x5449
+#define LDC1612_DEVICE_ID                  0x3055
+
+/******************************************************************************/
+
+#define COIL_RP_KOM              7.2
+#define COIL_L_UH                11.22
+#define COIL_C_PF                150
+#define COIL_Q_FACTOR            31.09
+#define COIL_FREQ_HZ             5323770
+
+/******************************************************************************/
+
+typedef enum {
+    LDC1612_STATUS_SUCCESS = 0,
+    LDC1612_STATUS_ERROR,
+    LDC1612_STATUS_TIMEOUT,
+    LDC1612_STATUS_INVALID_PARAM,
+    LDC1612_STATUS_NO_COIL,
+    LDC1612_STATUS_UNDER_RANGE,
+    LDC1612_STATUS_OVER_RANGE
+} ldc1612_status_t;
+
+/******************************************************************************/
+ldc1612_status_t ldc1612_init(void);
+
+ldc1612_status_t ldc1612_reset_sensor(void);
+
+ldc1612_status_t ldc1612_config_single_channel(uint8_t channel);
+
+uint16_t ldc1612_get_manufacturer_id(void);
+
+uint16_t ldc1612_get_deveice_id(void);
+
+uint32_t ldc1612_get_raw_channel_result(uint8_t channel);
+
+void ldc1612_drvie_current_detect(uint8_t channel);
+
+uint16_t ldc1612_get_sensor_status(void);
+
+bool ldc1612_is_data_ready(uint8_t channel);
+
+#endif //LDC1612_H
--- a/Inc/led.h
+++ b/Inc/led.h
@@ -8,5 +8,6 @@ void led_init(void);
 void led_on(void);
 void led_off(void);
 void led_toggle(void);
+void led_heart_beat(void);

 #endif // LED_H
--- a/Inc/soft_i2c.h
+++ b/Inc/soft_i2c.h
@@ -0,0 +1,52 @@
+//
+// Created by dell on 24-12-28.
+//
+
+#ifndef SOFT_I2C_H
+#define SOFT_I2C_H
+
+#include "gd32e23x_it.h"
+#include "gd32e23x.h"
+#include "systick.h"
+
+#include "board_config.h"
+
+/******************************************************************************/
+
+#define I2C_SCL_HIGH()      gpio_bit_set(I2C_SCL_PORT, I2C_SCL_PIN)
+#define I2C_SCL_LOW()       gpio_bit_reset(I2C_SCL_PORT, I2C_SCL_PIN)
+#define I2C_SDA_HIGH()      gpio_bit_set(I2C_SDA_PORT, I2C_SDA_PIN)
+#define I2C_SDA_LOW()       gpio_bit_reset(I2C_SDA_PORT, I2C_SDA_PIN)
+#define I2C_SDA_READ()      gpio_input_bit_get(I2C_SDA_PORT, I2C_SDA_PIN)
+
+/******************************************************************************/
+
+#define SOFT_I2C_OK          1
+#define SOFT_I2C_FAIL        0
+#define SOFT_I2C_END         1
+
+/******************************************************************************/
+
+void soft_i2c_delay(void);
+
+void soft_i2c_config(void);
+
+void soft_i2c_start(void);
+
+void soft_i2c_stop(void);
+
+void soft_i2c_send_ack(void);
+
+void soft_i2c_send_nack(void);
+
+uint8_t soft_i2c_wait_ack(void);
+
+void soft_i2c_send_byte(uint8_t data);
+
+uint8_t soft_i2c_receive_byte(uint8_t ack);
+
+uint8_t soft_i2c_write_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t data[2]);
+
+uint8_t soft_i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data);
+
+#endif //SOFT_I2C_H
--- a/Inc/systick.h
+++ b/Inc/systick.h
@@ -1,47 +1,36 @@
-/*!
-    \file  systick.h
-    \brief the header file of systick
-    
-    \version 2025-02-10, V2.4.0, demo for GD32E23x
+/**
+* ************************************************************************
+ *
+ * @file systick.h
+ * @author GD32
+ * @brief
+ *
+ * ************************************************************************
+ * @copyright Copyright (c) 2024 GD32
+ * ************************************************************************
 */
-
-/*
-    Copyright (c) 2025, GigaDevice Semiconductor Inc.
-
-    Redistribution and use in source and binary forms, with or without modification, 
-are permitted provided that the following conditions are met:
-
-    1. Redistributions of source code must retain the above copyright notice, this 
-       list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright notice, 
-       this list of conditions and the following disclaimer in the documentation 
-       and/or other materials provided with the distribution.
-    3. Neither the name of the copyright holder nor the names of its contributors 
-       may be used to endorse or promote products derived from this software without 
-       specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
-IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
-NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
-WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
-OF SUCH DAMAGE.
-*/
-
 #ifndef SYS_TICK_H
 #define SYS_TICK_H

 #include <stdint.h>

+/* function declarations */
 /* configure systick */
 void systick_config(void);
+
+/* delay a time in 10 microseconds */
+void delay_10us(uint32_t count);
+
 /* delay a time in milliseconds */
 void delay_ms(uint32_t count);
-/* delay decrement */
+
+/* decrement delay counters */
 void delay_decrement(void);

+// /* delay function that doesn't interfere with SysTick interrupt */
+// void delay_ms_safe(uint32_t count);
+
+// /* delay a time in microseconds (safe version) */
+// void delay_us_safe(uint32_t count);
+
 #endif /* SYS_TICK_H */
--- a/Inc/tmp112.h
+++ b/Inc/tmp112.h
@@ -0,0 +1,157 @@
+//
+// Created by dell on 24-12-20.
+// TMP112A Temperature Sensor Driver Header
+//
+
+#ifndef TMP112_H
+#define TMP112_H
+
+#include "gd32e23x_it.h"
+#include "gd32e23x.h"
+#include "systick.h"
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "board_config.h"
+#include "i2c.h"
+
+/******************************************************************************/
+/* TMP112A I2C Address */
+#define TMP112A_ADDR                            (0x49)  // 7-bit address (ADD0=GND)
+
+/* Register Addresses */
+/******************************************************************************/
+#define TMP112A_TEMP_REG                        0x00    // 温度寄存器
+#define TMP112A_CONFIG_REG                      0x01    // 配置寄存器
+#define TMP112A_TLOW_REG                        0x02    // 低温阈值寄存器
+#define TMP112A_THIGH_REG                       0x03    // 高温阈值寄存器
+
+/* Configuration Register Bits */
+/******************************************************************************/
+#define TMP112A_CONFIG_OS                       (1 << 15)   // One-shot
+#define TMP112A_CONFIG_R1                       (1 << 14)   // Converter resolution bit 1
+#define TMP112A_CONFIG_R0                       (1 << 13)   // Converter resolution bit 0
+#define TMP112A_CONFIG_F1                       (1 << 12)   // Fault queue bit 1
+#define TMP112A_CONFIG_F0                       (1 << 11)   // Fault queue bit 0
+#define TMP112A_CONFIG_POL                      (1 << 10)   // Polarity
+#define TMP112A_CONFIG_TM                       (1 << 9)    // Thermostat mode
+#define TMP112A_CONFIG_SD                       (1 << 8)    // Shutdown
+#define TMP112A_CONFIG_CR1                      (1 << 7)    // Conversion rate bit 1
+#define TMP112A_CONFIG_CR0                      (1 << 6)    // Conversion rate bit 0
+#define TMP112A_CONFIG_AL                       (1 << 5)    // Alert
+#define TMP112A_CONFIG_EM                       (1 << 4)    // Extended mode
+
+/* Resolution Settings */
+/******************************************************************************/
+#define TMP112A_RESOLUTION_9BIT                 0x0000      // 9-bit (0.5°C)
+#define TMP112A_RESOLUTION_10BIT                0x2000      // 10-bit (0.25°C)
+#define TMP112A_RESOLUTION_11BIT                0x4000      // 11-bit (0.125°C)
+#define TMP112A_RESOLUTION_12BIT                0x6000      // 12-bit (0.0625°C)
+
+/* Conversion Rate Settings */
+/******************************************************************************/
+#define TMP112A_RATE_0_25HZ                     0x0000      // 0.25 Hz (4s)
+#define TMP112A_RATE_1HZ                        0x0040      // 1 Hz (1s)
+#define TMP112A_RATE_4HZ                        0x0080      // 4 Hz (250ms)
+#define TMP112A_RATE_8HZ                        0x00C0      // 8 Hz (125ms)
+
+/* Default Configuration */
+/******************************************************************************/
+#define TMP112A_CONFIG_DEFAULT                  (TMP112A_RESOLUTION_12BIT | TMP112A_RATE_8HZ)
+
+/* Temperature Conversion Constants */
+/******************************************************************************/
+#define TMP112A_TEMP_RESOLUTION                 0.0625f     // 12-bit resolution (°C/LSB)
+#define TMP112A_TEMP_MIN                        -55.0f      // 最低温度 (°C)
+#define TMP112A_TEMP_MAX                        125.0f      // 最高温度 (°C)
+
+/* Status Definitions */
+/******************************************************************************/
+typedef enum {
+    TMP112A_STATUS_SUCCESS = 0,
+    TMP112A_STATUS_ERROR,
+    TMP112A_STATUS_TIMEOUT,
+    TMP112A_STATUS_INVALID_PARAM,
+    TMP112A_STATUS_OUT_OF_RANGE
+} tmp112a_status_t;
+
+typedef struct {
+    uint16_t raw_data;
+    float temperature_c;
+    float temperature_f;
+    bool alert_flag;
+} tmp112a_result_t;
+
+/******************************************************************************/
+/* Function Declarations */
+
+/*!
+    \brief      初始化TMP112A传感器
+    \param[in]  none
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_init(void);
+
+/*!
+    \brief      配置TMP112A传感器
+    \param[in]  config: 配置值
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_config(uint16_t config);
+
+/*!
+    \brief      读取温度
+    \param[in]  none
+    \param[out] result: 结果结构体指针
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_read_temperature(tmp112a_result_t *result);
+
+void tmp112a_get_raw_temperature_value(uint8_t *value);
+
+/*!
+    \brief      设置温度阈值
+    \param[in]  low_temp: 低温阈值 (°C)
+    \param[in]  high_temp: 高温阈值 (°C)
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_set_thresholds(float low_temp, float high_temp);
+
+/*!
+    \brief      进入关机模式
+    \param[in]  none
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_shutdown(void);
+
+/*!
+    \brief      退出关机模式
+    \param[in]  none
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_wakeup(void);
+
+/*!
+    \brief      单次转换
+    \param[in]  none
+    \param[out] result: 结果结构体指针
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_one_shot(tmp112a_result_t *result);
+
+/*!
+    \brief      获取状态字符串
+    \param[in]  status: 状态码
+    \param[out] none
+    \retval     const char* 状态字符串
+*/
+const char* tmp112a_get_status_string(tmp112a_status_t status);
+
+#endif //TMP112_H
--- a/Inc/uart.h
+++ b/Inc/uart.h
@@ -3,14 +3,6 @@

 #include "gd32e23x.h"

-typedef enum {
-    UART_PRINTF_USART0 = 0,
-    UART_PRINTF_USART1 = 1,
-    UART_PRINTF_BOTH   = 2
-} uart_printf_port_t;
-
-void uart0_init(uint32_t baudrate);
-void uart1_init(uint32_t baudrate);
-void uart_set_printf_port(uart_printf_port_t port);
+void rs485_init(void);

 #endif // UART_H
--- a/Inc/uart_ring_buffer.h
+++ b/Inc/uart_ring_buffer.h
@@ -0,0 +1,119 @@
+/**
+ * @file uart_ring_buffer.h
+ * @brief 简单高效的环形接收缓冲区（字节队列）接口声明。
+ * @details 提供字节写入/读取、可读长度查询、清空与丢弃统计等 API，
+ *          适用于中断接收（写）与主循环解析（读）的典型嵌入式串口场景。
+ */
+#ifndef UART_RING_BUFFER_H
+#define UART_RING_BUFFER_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/**
+ * @def UART_RX_BUFFER_SIZE
+ * @brief 接收环形缓冲区容量（单位：字节）。
+ * @note 采用“预留一格”区分空/满策略，最大可用容量为 UART_RX_BUFFER_SIZE-1。
+ */
+#define UART_RX_BUFFER_SIZE 64
+
+/**
+ * @defgroup RingBuffer 环形缓冲区
+ * @brief 字节环形缓冲区（接收端）
+ * @{
+ */
+
+/**
+ * @section RingBuffer_Usage 使用说明
+ * 典型用法：中断接收（写入环形缓冲）、主循环解析（读取环形缓冲）。
+ *
+ * 1) 初始化
+ * @code{.c}
+ * uart_ring_buffer_init();
+ * @endcode
+ *
+ * 2) 使能串口接收非空中断（RBNE）并开启中断（以 USART0 为例）
+ * @code{.c}
+ * usart_interrupt_enable(USART0, USART_INT_RBNE);
+ * nvic_irq_enable(USART0_IRQn, 2, 0); // 根据工程需要设置优先级
+ * @endcode
+ *
+ * 3) 在中断服务函数中写入环形缓冲（参考你当前工程的写法）
+ * @code{.c}
+ * void USART0_IRQHandler(void) {
+ *     if (RESET != usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE)) {
+ *         uint8_t data = usart_data_receive(USART0);
+ *         (void)uart_ring_buffer_put(data); // 缓冲满时丢弃并计数
+ *     }
+ * }
+ * @endcode
+ *
+ * 4) 在主循环中读取处理
+ * @code{.c}
+ * while (uart_ring_buffer_available() > 0) {
+ *     int b = uart_ring_buffer_get();
+ *     if (b >= 0) {
+ *         // 处理字节 b
+ *     }
+ * }
+ * @endcode
+ *
+ * @note 缓冲区满时新字节会被丢弃，可用 uart_ring_buffer_drop_count() 查看累计丢弃数。
+ * @note 采用“预留一格”区分空/满，最大可用容量为 UART_RX_BUFFER_SIZE-1。
+ */
+
+/**
+ * @brief 初始化环形缓冲区。
+ * @details 复位读/写索引与丢弃计数，准备接收数据。
+ * @note 若在中断环境使用，初始化前建议关闭相关接收中断以避免并发竞争。
+ * @ingroup RingBuffer
+ */
+void uart_ring_buffer_init(void);
+
+/**
+ * @brief 获取当前可读的字节数。
+ * @details 返回范围为 [0, UART_RX_BUFFER_SIZE-1]。
+ * @return 可读字节数（uint8_t）。
+ * @note 预留一个空槽区分“空/满”，因此满时返回 UART_RX_BUFFER_SIZE-1。
+ * @ingroup RingBuffer
+ */
+uint8_t uart_ring_buffer_available(void);
+
+/**
+ * @brief 从环形缓冲区读取一个字节。
+ * @details 若缓冲区非空，返回队头字节并推进读指针；若为空，返回 -1。
+ * @return 读取到的字节（0..255），或 -1 表示缓冲区为空。
+ * @retval -1 缓冲区为空，无数据可读。
+ * @ingroup RingBuffer
+ */
+int uart_ring_buffer_get(void);
+
+/**
+ * @brief 向环形缓冲区写入一个字节。
+ * @param data 待写入的字节。
+ * @return 是否写入成功。
+ * @retval true  写入成功。
+ * @retval false 写入失败（缓冲区已满，数据被丢弃并计数）。
+ * @note 如需改为“覆盖写入”策略，可在满时先推进读指针再写入。
+ * @ingroup RingBuffer
+ */
+bool uart_ring_buffer_put(uint8_t data);
+
+/**
+ * @brief 清空环形缓冲区。
+ * @details 复位读/写索引与丢弃计数，相当于逻辑上丢弃所有已接收数据，不擦除数据区内容。
+ * @ingroup RingBuffer
+ */
+void uart_ring_buffer_clear(void);
+
+/**
+ * @brief 获取因缓冲区满而被丢弃的字节累计数量。
+ * @details 该计数在 init/clear 时清零。
+ * @return 丢弃的累计字节数。
+ * @ingroup RingBuffer
+ */
+uint32_t uart_ring_buffer_drop_count(void);
+
+/** @} */
+
+#endif // UART_RING_BUFFER_H
--- a/Src/board_config.c
+++ b/Src/board_config.c
@@ -0,0 +1,52 @@
+#include "gd32e23x.h"
+#include "board_config.h"
+#include "systick.h"
+
+/******************************************************************************/
+
+#define FLASH_SIZE_ADDR      (*(const uint8_t *)0x1FFFF7E0) // Flash base address
+
+/******************************************************************************/
+
+/* 前向声明中断处理函数 */
+void usart0_irq_handler(void);
+void usart1_irq_handler(void);
+
+usart_config_t g_usart_config = {
+    .rcu_usart = RCU_USART1,
+    .usart_periph = USART1,
+    .irq_type = USART1_IRQn,
+    .irq_handler = usart1_irq_handler  // 初始化函数指针
+};
+
+uint8_t g_mcu_flash_size = 0;
+
+void mcu_detect_and_config(void) {
+    g_mcu_flash_size = FLASH_SIZE_ADDR;
+
+    switch (g_mcu_flash_size) {
+        case GD32E23XF4:
+            g_usart_config.rcu_usart = RCU_USART0;
+            g_usart_config.usart_periph = USART0;
+            g_usart_config.irq_type = USART0_IRQn;
+            g_usart_config.irq_handler = usart0_irq_handler;  // 指向USART0处理函数
+            break;
+        case GD32E23XF6:
+            g_usart_config.rcu_usart = RCU_USART1;
+            g_usart_config.usart_periph = USART1;
+            g_usart_config.irq_type = USART1_IRQn;
+            g_usart_config.irq_handler = usart1_irq_handler;  // 指向USART1处理函数
+            break;
+        default: // Default to GD32E23XF8
+            g_usart_config.rcu_usart = RCU_USART1;
+            g_usart_config.usart_periph = USART1;
+            g_usart_config.irq_type = USART1_IRQn;
+            g_usart_config.irq_handler = usart1_irq_handler;  // 指向USART1处理函数
+            break;
+    }
+
+}
+
+uint8_t get_flash_size(void) {
+    return g_mcu_flash_size;
+}
--- a/Src/command.c
+++ b/Src/command.c
@@ -0,0 +1,487 @@
+/**
+ * @file command.c
+ * @brief 串口命令解析与处理模块实现
+ * @details 实现基于状态机的协议解析器，支持 D5 03 LEN [cmd] CRC 格式的命令处理，
+ *          包含命令帧解析、响应生成和传感器状态管理功能。
+ * @author Hulk
+ * @date 2025-08-13
+ * @version 1.0.0
+ * @ingroup Command
+ */
+
+#include "command.h"
+#include "uart_ring_buffer.h"
+#include "led.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include "board_config.h"
+#include "gd32e23x_usart.h"
+#include "ldc1612.h"
+#include "tmp112.h"
+
+/* ============================================================================
+ * 协议格式说明
+ * ============================================================================ */
+
+/**
+ * @name 协议帧格式
+ * @{
+ * @details 
+ * Host -> Device 命令帧格式：
+ *   [0] HEADER = 0xD5       // 包头标识
+ *   [1] BOARD_TYPE = 0x03   // 板卡类型标识
+ *   [2] LEN = 数据区字节数   // 有效载荷长度
+ *   [3..(3+LEN-1)] 数据     // 命令数据，如 "M1", "M2S123"
+ *   [last] CRC = 校验码     // 从索引1到(last-1)的累加和低8位
+ *
+ *   最小协议包长度为 6 字节
+ *   数据示例（两字节命令）："M1" / "M2" / "M3"
+ *
+ * Device -> Host 响应帧格式：
+ *   [0] 0xB5               // 响应包头
+ *   [1] TYPE               // 响应类型（0xF0=成功，0xF1..=错误类型）
+ *   [2] LEN                // 响应数据长度
+ *   [3..(3+LEN-1)] 数据    // 响应数据，如 "ok", "err"
+ *   [last] CRC             // 校验码（同命令帧规则）
+ * @}
+ */
+
+/* ============================================================================
+ * 协议常量定义  
+ * ============================================================================ */
+
+/** @name 协议帧标识符
+ * @{ */
+#define PROTOCOL_PACKAGE_HEADER   0xD5  /**< 命令帧包头标识 */
+#define PROTOCOL_BOARD_TYPE       0x03  /**< 板卡类型标识 */
+/** @} */
+
+/** @name 命令长度限制  
+ * @{ */
+#define COMMAND_MIN_LEN           2     /**< 最小命令长度，如"M1" */
+#define PROTOCOL_MIN_FRAME_LEN    (3 + COMMAND_MIN_LEN + 1)  /**< 最小完整帧长度：header+type+len+payload+crc = 6 */
+#define PROTOCOL_MAX_FRAME_LEN    16    /**< 最大完整帧长度 */
+/** @} */
+
+/** @name 响应帧标识符
+ * @{ */
+#define RESP_HEADER               0xB5  /**< 响应帧包头标识 */
+#define RESP_TYPE_OK              0xF0  /**< 成功响应类型 */
+#define RESP_TYPE_CRC_ERR         0xF1  /**< CRC校验错误 */
+#define RESP_TYPE_HEADER_ERR      0xF2  /**< 包头错误 */
+#define RESP_TYPE_TYPE_ERR        0xF3  /**< 类型错误 */
+#define RESP_TYPE_LEN_ERR         0xF4  /**< 长度错误 */
+/** @} */
+
+/* ============================================================================
+ * 模块内部变量
+ * ============================================================================ */
+
+/** @brief 传感器周期上报使能标志 */
+volatile bool g_eddy_current_sensor_report_enabled = false;
+volatile bool g_temperature_sensor_report_enabled = false;
+
+/** @name 预设响应数据
+ * @{ */
+static const uint8_t s_report_status_ok[]  = { 'o', 'k' };   /**< 成功响应数据 */
+static const uint8_t s_report_status_err[] = { 'e','r','r' }; /**< 错误响应数据 */
+/** @} */
+
+/* ============================================================================
+ * 公共接口函数
+ * ============================================================================ */
+
+/**
+ * @brief 查询电涡流传感器是否启用周期性传感器上报。
+ * @return true 表示启用；false 表示禁用。
+ * @ingroup Command
+ */
+bool get_eddy_sensor_report_enabled(void)
+{
+    return g_eddy_current_sensor_report_enabled;
+}
+
+/**
+ * @brief 设置电涡流传感器是否启用周期性传感器上报标志。
+ * @details 本模块内部保存的布尔状态，供其他逻辑决定是否进行周期性数据上报；
+ *          推荐通过本函数修改而非直接访问全局/静态变量，以便后续扩展（如加锁/回调）。
+ * @param status true 启用周期上报；false 禁用。
+ * @ingroup Command
+ */
+void set_eddy_sensor_report_status(bool status)
+{
+    g_eddy_current_sensor_report_enabled = status;
+}
+
+/**
+ * @brief 查询温度传感器是否启用周期性传感器上报。
+ * @return true 表示启用；false 表示禁用。
+ * @ingroup Command
+ */
+bool get_temp_sensor_report_enabled(void)
+{
+    return g_temperature_sensor_report_enabled;
+}
+
+/**
+ * @brief 设置温度传感器是否启用周期性传感器上报标志。
+ * @details 本模块内部保存的布尔状态，供其他逻辑决定是否进行周期性数据上报；
+ *          推荐通过本函数修改而非直接访问全局/静态变量，以便后续扩展（如加锁/回调）。
+ * @param status true 启用周期上报；false 禁用。
+ * @ingroup Command
+ */
+void set_temp_sensor_report_status(bool status)
+{
+    g_temperature_sensor_report_enabled = status;
+}
+
+/**
+ * @brief 计算协议包的 8 位累加校验值（Checksum）。
+ * @details 对输入缓冲区逐字节累加并取低 8 位，累加范围为 data[1] 至 data[len-2]，
+ *          即不包含包头 HEADER（索引 0）与尾部 CRC 字节（索引 len-1）。
+ *          当 len 小于最小协议帧长度（PACKAGE_MIN_LENGTH）时返回 0。
+ * @param  data 指向待校验的完整协议包缓冲区。
+ * @param  len  缓冲区总长度（字节），应满足 header + type + len + payload + crc 的最小格式。
+ * @return uint8_t 计算得到的 8 位校验值。
+ * @note   本函数实现为简单求和校验（Checksum），非多项式 CRC；与本协议“从索引 1 累加到 len-2”的规则一致。
+ * @ingroup Command
+ */
+static uint8_t command_sum_crc_calc(const uint8_t *data, uint8_t len)
+{
+    uint16_t crc = 0;
+    // 仅在满足协议最小帧长时计算（header + type + len + payload + crc）
+    if (len < PROTOCOL_MIN_FRAME_LEN) return 0;
+
+    // 累加从索引 1 到 len-2 的字节（不含 header 和 crc 字节）
+    for (uint8_t i = 1; i < (len - 1); i++) 
+    {
+        crc += data[i];
+    }
+    return (uint8_t)(crc & 0xFF);
+}
+
+/**
+ * @brief 发送协议响应帧（使用GD32E230标准库）。
+ * @details 构造并发送格式为 B5 TYPE LEN [payload] CRC 的响应帧，
+ *          自动计算CRC校验值并通过串口输出。
+ * @param type 响应类型码（如 RESP_TYPE_OK, RESP_TYPE_CRC_ERR 等）。
+ * @param payload 指向响应数据的缓冲区，当len为0时可为NULL。
+ * @param len 响应数据长度（字节），为0时不复制payload数据。
+ * @note 内部使用固定大小缓冲区，超长响应将被丢弃。
+ * @warning 使用GD32E230标准库函数发送，确保串口已正确初始化。
+ * @ingroup Command
+ */
+static void send_response(uint8_t type, const uint8_t *payload, uint8_t len)
+{
+    uint8_t buf_len = (uint8_t)(3 + len + 1);
+    uint8_t buf[16]; // 简单场景足够，必要时可增大
+    if (buf_len > sizeof(buf)) return; // 防御
+
+    buf[0] = RESP_HEADER;
+    buf[1] = type;
+    buf[2] = len;
+
+    // 简化逻辑：只有当len > 0且payload非空时才复制数据
+    if (len > 0 && payload != NULL) {
+        for (uint8_t i = 0; i < len; i++) {
+            buf[3 + i] = payload[i];
+        }
+    }
+
+    buf[buf_len - 1] = command_sum_crc_calc(buf, buf_len);
+
+    // 使用GD32E230标准库函数逐字节发送（标准库实现）
+    for (uint8_t i = 0; i < buf_len; i++) {
+        // 等待发送缓冲区空
+        while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
+        usart_data_transmit(RS485_PHY, buf[i]);
+    }
+
+    // 等待发送完成
+    while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
+
+    // // 使用printf发送（通过重定向到串口）
+    // for (uint8_t i = 0; i < buf_len; i++) {
+    //     printf("%c", buf[i]);
+    // }
+
+    // // 刷新缓冲区
+    // fflush(stdout);
+}
+
+/**
+ * @brief 判断字符是否为十进制数字字符。
+ * @param c 待检查的字符（ASCII码值）。
+ * @return bool 判断结果。
+ * @retval true  字符为 '0' 到 '9' 之间的数字字符。
+ * @retval false 字符不是十进制数字字符。
+ * @ingroup Command
+ */
+static inline bool is_dec_digit(uint8_t c) { return (c >= '0' && c <= '9'); }
+
+/**
+ * @brief 从缓冲区解析十进制无符号整数。
+ * @details 从指定位置开始连续读取十进制数字字符，累加构成32位无符号整数。
+ *          遇到非数字字符或到达长度限制时停止解析。
+ * @param s 指向待解析字符缓冲区的起始位置。
+ * @param n 允许解析的最大字符数。
+ * @param out 输出参数，存储解析结果，可为NULL。
+ * @return uint8_t 实际消耗的字符数。
+ * @retval 0 首字符不是数字，解析失败。
+ * @retval >0 成功解析的数字字符个数。
+ * @note 不处理符号、空白字符或进制前缀。
+ * @warning 不进行溢出检查，超出uint32_t范围时按无符号算术溢出处理。
+ * @ingroup Command
+ */
+static uint8_t parse_uint_dec(const uint8_t *s, uint8_t n, uint32_t *out)
+{
+    uint8_t i = 0;
+    uint32_t v = 0;
+    while (i < n && is_dec_digit(s[i]))
+    {
+        v = v * 10u + (uint32_t)(s[i] - '0');
+        i++;
+    }
+    if (i == 0) return 0; // 未读到数字
+    if (out) *out = v; // 
+    return i;
+}
+
+/* ============================================================================
+ * 命令处理函数
+ * ============================================================================ */
+
+/**
+ * @brief 解析并处理完整的命令帧。
+ * @details 处理经过协议校验的完整命令帧，支持以下命令格式：
+ *          - 无参数命令：M<数字>（如 M1、M2、M10、M201）
+ *          - 带参数命令：M<数字>S<参数>（如 M100S123，参数为十进制）
+ *          
+ *          支持的命令：
+ *          - M1: 开启LED，启用传感器上报
+ *          - M2: 关闭LED，禁用传感器上报  
+ *          - M100S<value>: 设置PWM值（示例）
+ *          
+ * @param frame 指向完整命令帧的缓冲区（从包头0xD5开始）。
+ * @param len 命令帧总长度（字节）。
+ * @note 函数内部进行帧格式校验，格式错误时自动发送错误响应。
+ * @warning 假设输入帧已通过基本协议校验（包头、类型、CRC等）。
+ * @ingroup Command
+ */
+void handle_command(const uint8_t *frame, uint8_t len) {
+    // 帧格式：D5 03 LEN [cmd] CRC; cmd 支持变长，如 "M1"、"M10"、"M201"、"M123S400"，有最小长度限制和命令长度校验
+    uint8_t cmd_len = frame[2];
+    if (len < PROTOCOL_MIN_FRAME_LEN || (uint8_t)(3 + cmd_len + 1) != len) return; // 长度不匹配或者小于最小限制
+
+    const uint8_t *cmd = &frame[3];   // 提取命令部分
+
+    // 命令必须以 'M' 开头
+    if (cmd[0] != 'M'){
+        send_response(RESP_TYPE_TYPE_ERR, s_report_status_err, sizeof(s_report_status_err));
+        return;
+    }
+
+    // 从 'M' 后开始解析
+    uint8_t cmd_index = 1;
+    // 解析M后的十进制数，即命令本体
+    uint32_t base_cmd = 0;
+    uint8_t used_base_cmd = parse_uint_dec(&cmd[cmd_index], (cmd_len - cmd_index), &base_cmd);
+    if (used_base_cmd == 0) 
+    {
+        // 'M' 后没有数字，格式错误
+        send_response(RESP_TYPE_LEN_ERR, s_report_status_err, sizeof(s_report_status_err));
+        return;
+    }
+
+    cmd_index = (uint8_t)(cmd_index + used_base_cmd); // 更新索引到命令后
+
+    // 情况A：无附加参数的基础命令
+    if (cmd_index == cmd_len) {
+        // 仅基础命令，如 M1, M2, M3
+        switch (base_cmd) {
+            case 1u: // M1: enable sensor report
+                set_eddy_sensor_report_status(true);
+                return;
+
+            case 2u: // M2: disable sensor report
+                set_eddy_sensor_report_status(false);
+                return;
+
+            case 3u:
+                set_temp_sensor_report_status(true);
+                return;
+                
+            case 4u:
+                set_temp_sensor_report_status(false);
+                return;
+
+            // case 201u: // M201命令
+            //     send_response(RESP_TYPE_OK, s_report_status_ok, sizeof(s_report_status_ok));
+            //     return;
+
+            default:
+                // 其它无参数命令在此扩展（示例：M100）处理逻辑该如何待定
+                // send_response(RESP_TYPE_OK, s_report_status_ok, sizeof(s_report_status_ok));
+                // return;
+                break;
+        }
+        // 未在处理列表的无参数基础命令，回复错误
+        send_response(RESP_TYPE_TYPE_ERR, s_report_status_err, sizeof(s_report_status_err));
+        return;
+    }
+
+    // 情况B：有附加参数的命令
+    if (cmd[cmd_index] == 'S') {
+        cmd_index++;
+        uint32_t param_value = 0;
+        const uint8_t used_param_cmd = parse_uint_dec(&cmd[cmd_index], (uint8_t)(cmd_len - cmd_index), &param_value);
+        if (used_param_cmd == 0) {
+            // 'S' 后没有数字，格式错误
+            send_response(RESP_TYPE_LEN_ERR, s_report_status_err, sizeof(s_report_status_err));
+            return;
+        }
+
+        switch (base_cmd)
+        {
+        // case 100u:
+        //     // set_pwm(param_value);
+        //     printf("Set PWM to %u\n", param_value);
+        //     return;
+        
+        default:
+            break;
+        }
+        send_response(RESP_TYPE_TYPE_ERR, s_report_status_err, sizeof(s_report_status_err));
+    }
+}
+
+/**
+ * @brief 处理串口环形缓冲区中的命令数据，解析完整的协议帧。
+ * @details 本函数实现一个基于状态机的协议解析器，用于处理格式为 D5 03 LEN [cmd] CRC 的命令帧：
+ *          - 状态1：等待包头字节 PROTOCOL_PACKAGE_HEADER (0xD5)
+ *          - 状态2：接收板卡类型字节 PROTOCOL_BOARD_TYPE (0x03)  
+ *          - 状态3：接收长度字段并计算期望的完整帧长度
+ *          - 状态4：继续接收剩余数据直到完整帧
+ *          - 状态5：对完整帧进行校验（包头、板卡类型、CRC）并处理
+ *          
+ *          函数采用非阻塞方式处理，每次调用处理缓冲区中所有可用数据。
+ *          遇到格式错误、长度异常或校验失败时自动重置状态机。
+ *          
+ * @note 本函数使用静态变量维护解析状态，因此不可重入。在中断环境中使用需注意并发安全。
+ *       协议帧最大长度受 PROTOCOL_MAX_FRAME_LEN 限制，超出范围的帧将被丢弃。
+ *       
+ * @warning 函数依赖 uart_ring_buffer_available() 和 uart_ring_buffer_get() 
+ *          正确实现，若这些函数有缺陷可能导致死循环或数据丢失。
+ *          
+ * @see handle_command() 用于处理校验通过的完整命令帧
+ * @see command_sum_crc_calc() 用于计算和校验 CRC 值
+ * @see send_response() 用于发送错误响应
+ * 
+ * @ingroup Command
+ */
+void command_process(void) {
+    static uint8_t cmd_buf[PROTOCOL_MAX_FRAME_LEN];
+    static uint8_t cmd_len = 0;
+    static uint8_t expected_cmd_len = 0; // 0 表示尚未确定总长度
+
+    while (uart_ring_buffer_available() > 0) {
+        int byte = uart_ring_buffer_get();
+        if (byte < 0) break;
+
+        if (cmd_len == 0) {
+            if ((uint8_t)byte == PROTOCOL_PACKAGE_HEADER) {
+                cmd_buf[cmd_len++] = (uint8_t)byte;
+                expected_cmd_len = 0; // 等待进一步字段以确定长度
+            } else {
+                // 丢弃非起始字节
+            }
+            continue;
+        }
+
+        if (cmd_len >= PROTOCOL_MAX_FRAME_LEN) {
+            // 防御：缓冲溢出，复位状态机
+            cmd_len = 0;
+            expected_cmd_len = 0;
+        }
+
+        // 缓存后续字节
+        cmd_buf[cmd_len++] = (uint8_t)byte;
+
+        // 当到达长度字段（索引 2）后，确定总长度：3 + LEN + 1
+        if (cmd_len == 3) {
+            uint8_t payload_len = cmd_buf[2];
+            expected_cmd_len = (uint8_t)(3 + payload_len + 1);
+            if (expected_cmd_len > PROTOCOL_MAX_FRAME_LEN) {
+                // 异常：长度超界，复位状态机
+                cmd_len = 0;
+                expected_cmd_len = 0;
+            }
+            continue;
+        }
+
+        if (expected_cmd_len > 0 && cmd_len == expected_cmd_len) {
+            // 到帧尾，进行各项校验
+            bool verification_status = true;
+
+            #ifdef DEBUG_VERBOSE
+            if (cmd_buf[0] != PROTOCOL_PACKAGE_HEADER) {
+                send_response(RESP_TYPE_HEADER_ERR, s_report_status_err, sizeof(s_report_status_err));
+                verification_status = false;
+            }
+            #endif
+
+            if (verification_status && cmd_buf[1] != PROTOCOL_BOARD_TYPE) {
+                send_response(RESP_TYPE_TYPE_ERR, s_report_status_err, sizeof(s_report_status_err));
+                verification_status = false;
+            }
+            if (verification_status) {
+                uint8_t crc_calc = command_sum_crc_calc(cmd_buf, expected_cmd_len);
+                uint8_t crc_recv = cmd_buf[expected_cmd_len - 1];
+                if (crc_calc != crc_recv) {
+                    send_response(RESP_TYPE_CRC_ERR, s_report_status_err, sizeof(s_report_status_err));
+                    verification_status = false;
+                }
+            }
+
+            if (verification_status) {
+                handle_command(cmd_buf, expected_cmd_len);
+            }
+
+            // 复位，等待下一帧
+            cmd_len = 0;
+            expected_cmd_len = 0;
+        }
+    }
+}
+
+void eddy_current_report(void) {
+    // if (!g_eddy_current_sensor_report_enabled) return;
+    uint32_t raw_result = ldc1612_get_raw_channel_result(CHANNEL_0);
+
+    uint8_t sensor_data[4];
+    sensor_data[0] = (uint8_t)(raw_result >> 24);
+    sensor_data[1] = (uint8_t)(raw_result >> 16);
+    sensor_data[2] = (uint8_t)(raw_result >> 8);
+    sensor_data[3] = (uint8_t)(raw_result & 0xFF);
+    
+    send_response(RESP_TYPE_OK, sensor_data, sizeof(sensor_data));
+}
+
+void temperature_raw_value_report(void) {
+    // if (!g_temperature_sensor_report_enabled) return;
+    uint8_t raw_result[4];
+    uint8_t value[2] = {0};
+    uint32_t raw_value = 0;
+
+    // i2c_read_16bits(TMP112A_ADDR, TMP112A_TEMP_REG, value);
+    tmp112a_get_raw_temperature_value(value);
+    raw_value = (uint32_t)((uint16_t) (value[0] << 4) | (value[1]>>4)) * 625;
+    raw_result[0] = (uint8_t)(raw_value >> 24);
+    raw_result[1] = (uint8_t)(raw_value >> 16);
+    raw_result[2] = (uint8_t)(raw_value >> 8);
+    raw_result[3] = (uint8_t)(raw_value & 0xFF);
+
+    send_response(RESP_TYPE_OK, raw_result, sizeof(raw_result));
+}
+    
--- a/Src/gd32e23x_it.c
+++ b/Src/gd32e23x_it.c
@@ -34,6 +34,10 @@ OF SUCH DAMAGE.

 #include "gd32e23x_it.h"
 #include "systick.h"
+#include "uart.h"
+#include "uart_ring_buffer.h"
+#include "led.h"
+#include "board_config.h"

 /*!
    \brief      this function handles NMI exception
@@ -93,7 +97,21 @@ void PendSV_Handler(void)
    \param[out] none
    \retval     none
 */
-void SysTick_Handler(void)
-{
+void SysTick_Handler(void) {
+    led_heart_beat();  // LED心跳指示灯
    delay_decrement();
 }
+
+void USART0_IRQHandler(void) {
+    // 检查当前配置是否使用USART0，并且函数指针不为空
+    if(g_usart_config.usart_periph == USART0 && g_usart_config.irq_handler != 0) {
+        g_usart_config.irq_handler();  // 通过函数指针调用对应的处理函数
+    }
+}
+
+void USART1_IRQHandler(void) {
+    // 检查当前配置是否使用USART1，并且函数指针不为空
+    if(g_usart_config.usart_periph == USART1 && g_usart_config.irq_handler != 0) {
+        g_usart_config.irq_handler();  // 通过函数指针调用对应的处理函数
+    }
+}
--- a/Src/i2c.c
+++ b/Src/i2c.c
@@ -0,0 +1,677 @@
+//
+// Created by dell on 24-12-20.
+//
+
+#include "i2c.h"
+
+/*!
+    \brief      configure the GPIO ports
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void i2c_gpio_config(void) {
+    /* enable IIC GPIO clock */
+    rcu_periph_clock_enable(RCU_GPIO_I2C);
+
+    /* connect I2C_SCL_PIN to I2C_SCL */
+    gpio_af_set(I2C_SCL_PORT, I2C_GPIO_AF, I2C_SCL_PIN);
+    /* connect I2C_SDA_PIN to I2C_SDA */
+    gpio_af_set(I2C_SDA_PORT, I2C_GPIO_AF, I2C_SDA_PIN);
+    /* configure GPIO pins of I2C */
+    gpio_mode_set(I2C_SCL_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, I2C_SCL_PIN);
+    gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
+    gpio_mode_set(I2C_SDA_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, I2C_SDA_PIN);
+    gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
+}
+
+/*!
+    \brief      configure the I2CX interface
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+i2c_result_t i2c_config(void) {
+    /* configure I2C GPIO */
+    i2c_gpio_config();
+    /* enable I2C clock */
+    rcu_periph_clock_enable(RCU_I2C);
+    /* configure I2C clock */
+    i2c_clock_config(I2C0, I2C_SPEED, I2C_DTCY_2);
+    /* configure I2C address */
+    i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, 0xA0);
+    /* enable I2CX */
+    i2c_enable(I2C0);
+    /* enable acknowledge */
+    i2c_ack_config(I2C0, I2C_ACK_ENABLE);
+
+    return I2C_RESULT_SUCCESS;
+}
+
+/* wait for SCL to go high, return true if successful, false if timeout */
+static bool i2c_wait_scl_high(uint16_t max_wait_time) {
+    while (max_wait_time--) {
+        if (gpio_input_bit_get(I2C_SCL_PORT, I2C_SCL_PIN)) {
+            return true;
+        }
+        delay_10us(1);
+    }
+    return false;
+}
+
+/* generate one manual SCL pulse; return true if SCL observed high (no stuck/overstretch) */
+static bool i2c_generate_scl_pulse(void) {
+    GPIO_BC(I2C_SCL_PORT) = I2C_SCL_PIN;   /* drive SCL low */
+    delay_10us(1);
+    GPIO_BOP(I2C_SCL_PORT) = I2C_SCL_PIN;  /* release SCL (open-drain -> high via pull-up) */
+    return i2c_wait_scl_high(200);         /* wait up to ~2ms for clock stretching release */
+}
+
+/*!
+    \brief      reset I2C bus
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+i2c_result_t i2c_bus_reset(void) {
+    /* 1. Disable & deinit peripheral so pins can be fully controlled */
+    i2c_disable(I2C0);
+    i2c_deinit(I2C0);
+
+#ifdef DEBUG_VERBOSE
+    printf("I2C bus reset\r\n");
+#endif
+
+    /* 2. Configure SCL/SDA as GPIO open-drain outputs with pull-up and release them */
+    gpio_mode_set(I2C_SCL_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, I2C_SCL_PIN);
+    gpio_mode_set(I2C_SDA_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, I2C_SDA_PIN);
+    gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
+    gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
+    gpio_bit_set(I2C_SCL_PORT, I2C_SCL_PIN); /* release SCL */
+    gpio_bit_set(I2C_SDA_PORT, I2C_SDA_PIN); /* release SDA */
+
+#ifdef DEBUG_VERBOSE
+    printf("I2C bus reset: SCL = %d, SDA = %d\r\n", gpio_input_bit_get(I2C_SCL_PORT, I2C_SCL_PIN), gpio_input_bit_get(I2C_SDA_PORT, I2C_SDA_PIN));
+#endif
+
+    /* 3. Double sample to confirm bus state */
+    delay_10us(1);
+    bool scl_value1 = gpio_input_bit_get(I2C_SCL_PORT, I2C_SCL_PIN);
+    bool sda_value1 = gpio_input_bit_get(I2C_SDA_PORT, I2C_SDA_PIN);
+    delay_10us(1);
+    bool scl_value2 = gpio_input_bit_get(I2C_SCL_PORT, I2C_SCL_PIN);
+    bool sda_value2 = gpio_input_bit_get(I2C_SDA_PORT, I2C_SDA_PIN);
+
+    /* 4. If SCL low -> stuck (cannot proceed) */
+    if (!scl_value2) {
+#ifdef DEBUG_VERBOSE
+        printf("I2C bus reset: SCL stuck low\r\n");
+#endif
+        return I2C_RECOVERY_SCL_STUCK_LOW;
+    }
+
+    /* 5. Fast path: bus idle */
+    if (scl_value1 && sda_value1 && scl_value2 && sda_value2) {
+        i2c_config();
+#ifdef DEBUG_VERBOSE
+        printf("I2C bus reset: bus idle\r\n");
+#endif
+        return I2C_RECOVERY_OK;
+    }
+
+    /* 6. SDA low: attempt to free by generating up to I2C_RECOVERY_CLOCKS pulses */
+    if (scl_value2 && !sda_value2) {
+        bool sda_released = false;
+#ifdef DEBUG_VERBOSE
+        printf("I2C bus reset: SCL will try to free SDA\r\n");
+#endif
+        for (uint8_t i = 0; i < I2C_RECOVERY_CLOCKS && !sda_released; i++) {
+            if (!i2c_generate_scl_pulse()) {
+                return I2C_RECOVERY_SCL_STUCK_LOW; /* SCL failed to go high */
+            }
+            if (gpio_input_bit_get(I2C_SDA_PORT, I2C_SDA_PIN)) {
+                sda_released = true;
+            }
+        }
+        if (!sda_released) {
+            return I2C_RECOVERY_SDA_STUCK_LOW;
+        }
+        /* 7. Generate a STOP condition to leave bus in idle state */
+#ifdef DEBUG_VERBOSE
+        printf("I2C bus reset: generating STOP condition\r\n");
+#endif
+        gpio_bit_reset(I2C_SDA_PORT, I2C_SDA_PIN); /* SDA low */
+        delay_10us(1);
+        gpio_bit_set(I2C_SCL_PORT, I2C_SCL_PIN);   /* ensure SCL high */
+        delay_10us(1);
+        gpio_bit_set(I2C_SDA_PORT, I2C_SDA_PIN);   /* SDA rising while SCL high -> STOP */
+        delay_10us(1);
+    }
+
+#ifdef DEBUG_VERBOSE
+        printf("I2C bus reset: bus recovered\r\n");
+#endif
+    /* 8. Reconfigure & enable peripheral */
+    i2c_config();
+    return I2C_RECOVERY_OK;
+}
+
+/**
+ * @brief 扫描I2C总线，查找连接的设备
+ *
+ * 该函数会扫描I2C总线上的所有地址（1到126），并尝试与每个地址进行通信。
+ * 如果在某个地址上发现了设备，则会打印出该设备的地址。
+ * 最后会打印出找到的设备总数。
+ */
+void i2c_scan(void) {
+    uint32_t timeout;
+    uint8_t address;
+    int found_devices = 0;
+
+    // printf("Scanning I2C bus...\r\n");
+    const char* msg1 = "Scanning I2C bus...\r\n";
+    for (uint8_t i = 0; msg1[i] != '\0'; i++) {
+        while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+        usart_data_transmit(I2C_DEBUG_UART, msg1[i]);
+    }
+    while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TC) == RESET) {}
+
+    for (address = 1; address < 127; address++) {
+        timeout = 0;
+
+        // 生成起始条件
+        while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT))
+            timeout++;
+        if (timeout >= I2C_TIME_OUT) {
+            continue; // 超时，跳过该地址
+        }
+        i2c_start_on_bus(I2C0);
+        timeout = 0;
+
+        // 等待起始条件发送完成
+        while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND) && (timeout < I2C_TIME_OUT))
+            timeout++;
+        if (timeout >= I2C_TIME_OUT) {
+            continue; // 超时，跳过该地址
+        }
+        i2c_master_addressing(I2C0, (address << 1), I2C_TRANSMITTER);
+        timeout = 0;
+
+        // 等待地址发送完成
+        while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
+            timeout++;
+        if (timeout < I2C_TIME_OUT) {
+            i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
+            // printf("Found device at 0x%02X\r\n", address);
+            const char* msg2_prefix = "Found device at 0x";
+            for (uint8_t i = 0; msg2_prefix[i] != '\0'; i++) {
+                while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+                usart_data_transmit(I2C_DEBUG_UART, msg2_prefix[i]);
+            }
+            // 发送地址的十六进制表示
+            uint8_t hex_chars[] = "0123456789ABCDEF";
+            while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+            usart_data_transmit(I2C_DEBUG_UART, hex_chars[(address >> 4) & 0x0F]);
+            while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+            usart_data_transmit(I2C_DEBUG_UART, hex_chars[address & 0x0F]);
+            const char* msg2_suffix = "\r\n";
+            for (uint8_t i = 0; msg2_suffix[i] != '\0'; i++) {
+                while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+                usart_data_transmit(I2C_DEBUG_UART, msg2_suffix[i]);
+            }
+            while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TC) == RESET) {}
+            found_devices++;
+        }
+
+        // 生成停止条件
+        i2c_stop_on_bus(I2C0);
+
+        timeout = 0;
+
+        while (i2c_flag_get(I2C0, I2C_FLAG_STPDET) && (timeout < I2C_TIME_OUT))
+            timeout++;
+    }
+
+    if (found_devices == 0) {
+        // printf("No I2C devices found.\r\n");
+        const char* msg3 = "No I2C devices found.\r\n";
+        for (uint8_t i = 0; msg3[i] != '\0'; i++) {
+            while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+            usart_data_transmit(I2C_DEBUG_UART, msg3[i]);
+        }
+        while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TC) == RESET) {}
+    } else {
+        // printf("Total %d I2C devices found.\r\n", found_devices);
+        const char* msg4_prefix = "Total ";
+        for (uint8_t i = 0; msg4_prefix[i] != '\0'; i++) {
+            while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+            usart_data_transmit(I2C_DEBUG_UART, msg4_prefix[i]);
+        }
+        // 发送设备数量
+        if (found_devices >= 10) {
+            while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+            usart_data_transmit(I2C_DEBUG_UART, '0' + (found_devices / 10));
+        }
+        while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+        usart_data_transmit(I2C_DEBUG_UART, '0' + (found_devices % 10));
+        const char* msg4_suffix = " I2C devices found.\r\n";
+        for (uint8_t i = 0; msg4_suffix[i] != '\0'; i++) {
+            while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TBE) == RESET) {}
+            usart_data_transmit(I2C_DEBUG_UART, msg4_suffix[i]);
+        }
+        while (usart_flag_get(I2C_DEBUG_UART, USART_FLAG_TC) == RESET) {}
+    }
+}
+
+i2c_result_t i2c_write_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t data[2]) {
+    i2c_state_t state = I2C_STATE_START;
+    uint16_t timeout = 0;
+    uint8_t retry_count = 0;
+
+    /* parameter validation */
+    if (data == NULL || slave_addr > 0x7F) {
+        return I2C_RESULT_INVALID_PARAM;
+    }
+
+    while (retry_count < I2C_MAX_RETRY) {
+        switch (state) {
+            case I2C_STATE_START:
+                timeout = 0;
+
+                /* wait for bus to be idle */
+                while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                i2c_start_on_bus(I2C0);
+                timeout = 0;
+                state = I2C_STATE_SEND_ADDRESS;
+                break;
+
+            case I2C_STATE_SEND_ADDRESS:
+                /* wait for start condition to be sent. SBSEND flag */
+                while((!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* send slave address */
+                i2c_master_addressing(I2C0, slave_addr << 1, I2C_TRANSMITTER);
+                timeout = 0;
+                state = I2C_STATE_CLEAR_ADDRESS;
+                break;
+
+            case I2C_STATE_CLEAR_ADDRESS:
+                /* wait for address to be acknowledged.ADDSEND set means i2c slave sends ACK */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)) && (!i2c_flag_get(I2C0, I2C_FLAG_AERR)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                } else if (i2c_flag_get(I2C0, I2C_FLAG_ADDSEND))
+                {
+                    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
+                    timeout =0;
+                    state = I2C_STATE_TRANSMIT_REG;
+                    break;
+                } else {
+                    i2c_flag_clear(I2C0, I2C_FLAG_AERR);
+                    timeout =0;
+#ifdef DEBUG_VERBOES
+                    printf("IIC write failed for Error Slave Address. \n");
+#endif
+                    return I2C_RESULT_NACK;
+                }
+
+            case I2C_STATE_TRANSMIT_REG:
+                /* wait until the transmit data buffer is empty */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_TBE)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* send register address */
+                i2c_data_transmit(I2C0, reg_addr);
+                timeout = 0;
+                state = I2C_STATE_TRANSMIT_DATA;
+                break;
+
+            case I2C_STATE_TRANSMIT_DATA:
+                /* wait until the transmit data buffer is empty */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_TBE)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* send register MSB value */
+                i2c_data_transmit(I2C0, data[0]);
+                timeout = 0;
+                
+                /* wait until the transmit data buffer is empty */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_TBE)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                if (i2c_flag_get(I2C0, I2C_FLAG_AERR)) {
+                    i2c_stop_on_bus(I2C0);
+                    return I2C_RESULT_NACK;
+                } else if (i2c_flag_get(I2C0, I2C_FLAG_BERR) || i2c_flag_get(I2C0, I2C_FLAG_LOSTARB)) {
+                    // 可按需清标志
+                    i2c_stop_on_bus(I2C0);
+                    return I2C_RESULT_ERROR;
+                }
+
+                /* send register LSB value */
+                i2c_data_transmit(I2C0, data[1]);
+                timeout = 0;
+                
+                /* wait until BTC bit is set */
+                while (!i2c_flag_get(I2C0, I2C_FLAG_BTC) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                state = I2C_STATE_STOP;
+                break;
+
+            case I2C_STATE_STOP:
+                /* send a stop condition to I2C bus */
+                i2c_stop_on_bus(I2C0);
+
+                timeout = 0;
+                while ((I2C_CTL0(I2C0) & I2C_CTL0_STOP) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* i2c master sends STOP signal successfully */
+                /* success */
+                return I2C_RESULT_SUCCESS;
+
+            case I2C_STATE_ERROR:
+                /* send a stop condition to I2C bus */
+                i2c_stop_on_bus(I2C0);
+
+                timeout = 0;
+                while ((I2C_CTL0(I2C0) & I2C_CTL0_STOP) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    return I2C_RESULT_ERROR;
+                }
+
+                i2c_flag_clear(I2C0, I2C_FLAG_AERR);
+                i2c_flag_clear(I2C0, I2C_FLAG_BERR);
+                i2c_flag_clear(I2C0, I2C_FLAG_LOSTARB);
+
+                retry_count ++;
+                if (retry_count >= I2C_MAX_RETRY)
+                {
+#ifdef DEBUG_VERBOES
+                    printf("IIC write failed after %d retries\n", I2C_MAX_RETRY);
+#endif
+                    return I2C_RESULT_ERROR;
+                }
+
+                /* reset state machine for retry */
+                state = I2C_STATE_START;
+                timeout = 0;
+
+                /* small delay before retry */
+                delay_10us(10);
+                break;
+                
+            default:
+                state = I2C_STATE_START;
+                break;
+        }
+    }
+    return I2C_RESULT_TIMEOUT;
+}
+
+i2c_result_t i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data) {
+    i2c_state_t state = I2C_STATE_START;
+    uint16_t timeout = 0;
+    uint8_t retry_count = 0;
+    bool write_phase = true;
+
+    // 参数检查：防止空指针和非法地址
+    if (data == NULL || slave_addr > 0x7F) {
+        return I2C_RESULT_INVALID_PARAM;
+    }
+
+    /* enable acknowledge */
+    i2c_ack_config(I2C0, I2C_ACK_ENABLE);
+
+    while (retry_count < (uint8_t)I2C_MAX_RETRY) {
+        switch (state) {
+            case I2C_STATE_START:
+                timeout = 0;
+
+                // wait for bus to be idle
+                while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                // send start condition
+                i2c_start_on_bus(I2C0);
+                state = I2C_STATE_SEND_ADDRESS;
+                timeout = 0;
+                break;
+
+            case I2C_STATE_SEND_ADDRESS:
+                /* wait for start condition to be sent  */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                // send slave address
+                if (write_phase) {
+                    /* write phase: send address with write bit */
+                    i2c_master_addressing(I2C0, (slave_addr << 1), I2C_TRANSMITTER);
+                } else {
+                    /* read phase: send address with read bit */
+                    i2c_master_addressing(I2C0, (slave_addr << 1) | 0x01, I2C_RECEIVER);
+                }
+
+                state = I2C_STATE_CLEAR_ADDRESS;
+                timeout = 0;
+                break;
+
+            case I2C_STATE_CLEAR_ADDRESS:
+                /* wait for address to be acknowledged */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                if (write_phase) {
+                    /* clear address flag (write phase) */
+                    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
+                    state = I2C_STATE_TRANSMIT_DATA;
+                } else {
+                    /* READ phase for 2 bytes: set POS=NEXT and disable ACK BEFORE clearing ADDR */
+                    i2c_ackpos_config(I2C0, I2C_ACKPOS_NEXT);
+                    i2c_ack_config(I2C0, I2C_ACK_DISABLE);
+
+                    /* now clear address flag to release SCL and enter data phase */
+                    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
+
+                    state = I2C_STATE_RECEIVE_DATA;
+                }
+
+                timeout = 0;
+                break;
+
+            case I2C_STATE_TRANSMIT_DATA:
+                /* wait for transmit buffer to be empty */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_TBE)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* send register address */
+                i2c_data_transmit(I2C0, reg_addr);
+                state = I2C_STATE_RESTART;
+                timeout = 0;
+                break;
+
+            case I2C_STATE_RESTART:
+                /* wait for byte transfer complete  BTC: Bit Transfer Complete */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_BTC)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* generate repeated start condition */
+                i2c_start_on_bus(I2C0);
+                
+                /* wait for repeated start condition to be sent */
+                timeout = 0;
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* send slave address with read bit (R/W bit is set by library) */
+                i2c_master_addressing(I2C0, (slave_addr << 1), I2C_RECEIVER);
+
+                /* switch to read phase */
+                write_phase = false;
+                state = I2C_STATE_CLEAR_ADDRESS;
+                timeout = 0;
+                break;
+
+            case I2C_STATE_RECEIVE_DATA:
+                /* Wait for BTC (both bytes received) */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_BTC)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* Send STOP before reading the last two bytes */
+                i2c_stop_on_bus(I2C0);
+
+                /* Read the two bytes back-to-back */
+                data[0] = i2c_data_receive(I2C0);
+                data[1] = i2c_data_receive(I2C0);
+
+                state = I2C_STATE_STOP;
+                break;
+
+            case I2C_STATE_STOP:
+                /* wait for stop condition to complete */
+                while ((I2C_CTL0(I2C0) & I2C_CTL0_STOP) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout >= I2C_TIME_OUT) {
+                    state = I2C_STATE_ERROR;
+                    break;
+                }
+
+                /* i2c master sends STOP signal successfully */
+                /* success */
+                return I2C_RESULT_SUCCESS;
+
+            case I2C_STATE_ERROR:
+                /* send stop condition to release bus */
+                i2c_stop_on_bus(I2C0);
+
+                retry_count++;
+                if (retry_count >= I2C_MAX_RETRY) {
+#ifdef DEBUG_VERBOES
+                    printf("IIC read failed after %d retries\n", I2C_RETRY_MAX);
+#endif
+                    return I2C_RESULT_ERROR;
+                }
+
+                /* reset state machine for retry */
+                state = I2C_STATE_START;
+                write_phase = true;
+                timeout = 0;
+
+                /* small delay before retry */
+                delay_10us(10);
+                break;
+
+            default:
+                state = I2C_STATE_START;
+                break;
+        }
+    }
+    return I2C_RESULT_TIMEOUT;
+}
+
+#ifdef DEBUG_VERBOSE
+/*!
+    \brief      get status string for debugging
+    \param[in]  status: i2c_status_t value
+    \param[out] none
+    \retval     const char* status string
+*/
+const char* i2c_get_status_string(i2c_result_t status) {
+    switch (status) {
+        case I2C_RESULT_SUCCESS:
+            return "SUCCESS";
+        case I2C_RESULT_TIMEOUT:
+            return "TIMEOUT";
+        case I2C_RESULT_NACK:
+            return "NACK";
+        case I2C_RESULT_BUS_BUSY:
+            return "BUS_BUSY";
+        case I2C_RESULT_ERROR:
+            return "ERROR";
+        case I2C_RESULT_INVALID_PARAM:
+            return "INVALID_PARAM";
+        default:
+            return "UNKNOWN";
+    }
+}
+#endif
--- a/Src/ldc1612.c
+++ b/Src/ldc1612.c
@@ -0,0 +1,246 @@
+//
+// Created by dell on 24-12-3.
+//
+
+#include "ldc1612.h"
+
+/*!
+    \brief      写入寄存器
+    \param[in]  reg_addr: 寄存器地址
+    \param[in]  value: 写入值
+    \param[out] none
+    \retval     i2c_result_t
+*/
+static i2c_result_t ldc1612_write_register(uint8_t reg_addr, uint16_t value) {
+    uint8_t data[2];
+    data[0] = (value >> 8) & 0xFF;
+    data[1] = value & 0xFF;
+
+    return LDC1612_IIC_WRITE_16BITS(LDC1612_ADDR, reg_addr, data);
+}
+
+/*!
+    \brief      读取寄存器
+    \param[in]  reg_addr: 寄存器地址
+    \param[out] value: 读取值指针
+    \retval     i2c_status_t
+*/
+static i2c_result_t ldc1612_read_register(uint8_t reg_addr, uint16_t *value) {
+    uint8_t data[2];
+    i2c_result_t status;
+
+    if (value == NULL) {
+        return I2C_RESULT_INVALID_PARAM;
+    }
+
+    status = LDC1612_IIC_READ_16BITS(LDC1612_ADDR, reg_addr, data);
+    if (status == I2C_RESULT_SUCCESS) {
+        *value = ((uint16_t)data[0] << 8) | data[1];
+    }
+
+    return status;
+}
+
+/*!
+    \brief      计算并获取频率分频值
+    \param[in]  channel: 通道号
+    \param[out] none
+    \retval     计算得到的频率分频值
+*/
+static uint16_t ldc1612_calculate_freq_divider(uint8_t channel) {
+    uint16_t value;
+    uint16_t fin_div, freq_div;
+    float sensor_freq;
+
+    sensor_freq = 1 / (2 * 3.14 * sqrt(COIL_L_UH * COIL_C_PF * pow(10, -18))) * pow(10, -6);
+    fin_div = (uint16_t) (sensor_freq / 8.75 + 1);
+
+    if (fin_div * 4 < 40) {
+        freq_div = 2;
+    } else {
+        freq_div = 4;
+    }
+
+    value = fin_div << 12;
+    value |= freq_div;
+    
+    return value;
+}
+
+uint16_t ldc1612_get_manufacturer_id(void) {
+    uint8_t data[2] = {0};
+
+    LDC1612_IIC_READ_16BITS(LDC1612_ADDR, READ_MANUFACTURER_ID, data);
+    return (data[0] << 8) | data[1];
+}
+
+uint16_t ldc1612_get_deveice_id(void) {
+    uint8_t data[2] = {0};
+
+    LDC1612_IIC_READ_16BITS(LDC1612_ADDR, READ_DEVICE_ID, data);
+    return (data[0] << 8) | data[1];
+}
+
+/** @brief reset sensor.
+
+ * */
+ldc1612_status_t ldc1612_reset_sensor(void) {
+    i2c_result_t state = ldc1612_write_register(SENSOR_RESET_REG, LDC1612_RESET_DEV);
+    return (state == I2C_RESULT_SUCCESS) ? LDC1612_STATUS_SUCCESS : LDC1612_STATUS_ERROR;
+}
+
+ldc1612_status_t ldc1612_init(void) {
+    i2c_result_t i2c_status;
+    uint16_t manufacturer_id, device_id;
+
+    /* reset LDC1612 sensor */
+    i2c_status = ldc1612_reset_sensor();
+    if (i2c_status != I2C_RESULT_SUCCESS) {
+        return LDC1612_STATUS_ERROR;
+    }
+
+    delay_ms(100);
+
+    manufacturer_id = ldc1612_get_manufacturer_id();
+    device_id = ldc1612_get_deveice_id();
+
+    if (manufacturer_id != 0x5449 || device_id != 0x3055) {
+        return LDC1612_STATUS_ERROR;
+    }
+
+    return LDC1612_STATUS_SUCCESS;
+}
+
+/*!
+    \brief      配置单通道模式
+    \param[in]  channel: 通道号 (0或1)
+    \param[out] none
+    \retval     ldc1612_status_t
+*/
+ldc1612_status_t ldc1612_config_single_channel(uint8_t channel) {
+    i2c_result_t status;
+
+    if (channel > 1) {
+        return LDC1612_STATUS_INVALID_PARAM;
+    }
+
+    /* 配置顺序严格按照TI官方文档要求 */
+    
+    /* Step 1: 确保传感器处于睡眠模式 - 配置前必须 */
+    status = ldc1612_write_register(SENSOR_CONFIG_REG, LDC1612_SLEEP_MODE);
+    if (status != I2C_RESULT_SUCCESS) return LDC1612_STATUS_ERROR;
+    delay_ms(10);
+
+    /* Step 2: 配置频率分频 - 必须在其他配置之前 */
+    uint16_t freq_divider = ldc1612_calculate_freq_divider(channel);
+    ldc1612_write_register(SET_FREQ_REG_START + channel, freq_divider);
+    delay_ms(5);
+
+    /* Step 3: 配置LC稳定时间 - 影响测量精度 */
+    ldc1612_write_register(SET_SETTLECOUNT_REG_START + channel, LDC1612_SETTLECOUNT_CH0);
+
+    /* Step 4: 配置转换时间 - 影响测量速度和精度 */
+    ldc1612_write_register(SET_CONVERSION_TIME_REG_START + channel, LDC1612_RCOUNT_TIME_CH0);
+
+    /* Step 5: 配置转换偏移 */
+    ldc1612_write_register(SET_CONVERSION_OFFSET_REG_START + channel, SET_CONVERSION_OFFSET_CH0);
+
+    /* Step 6: 配置驱动电流 - 影响传感器灵敏度 */
+    ldc1612_write_register(SET_DRIVER_CURRENT_REG + channel, LDC1612_DRIVE_CURRENT);
+
+    /* Step 7: 配置多路复用器 - 设置通道选择和滤波 */
+    // ldc1612_configure_mux_register(LDC1612_MUX_AUTOSCAN_DISABLE, LDC1612_MUX_RR_SEQUENCE_0, LDC1612_MUX_FILTER_ALL_LOW, LDC1612_MUX_FILTER_NONE);
+    ldc1612_write_register(MUX_CONFIG_REG, LDC1612_MUX_CONFIG);
+
+    /* Step 8: 配置错误输出 */
+    ldc1612_write_register(ERROR_CONFIG_REG, LDC1612_ERROR_CONFIG);
+
+    /* Step 9: 最后启动传感器 - 必须最后一步 */
+    status = ldc1612_write_register(SENSOR_CONFIG_REG, LDC1612_SENSOR_CONFIG_CH0);
+    if (status != I2C_RESULT_SUCCESS) return LDC1612_STATUS_ERROR;
+    
+    /* Step 10: 等待传感器稳定 */
+    delay_ms(50);
+
+    return LDC1612_STATUS_SUCCESS;
+}
+
+/** @brief read the raw channel result from register.
+    @param channel LDC1612 has total two channels.
+    @param result raw data
+ * */
+uint32_t ldc1612_get_raw_channel_result(uint8_t channel) {
+    uint32_t raw_value = 0;
+    uint8_t value[2] = {0};
+
+    /* Read MSW */
+    LDC1612_IIC_READ_16BITS(LDC1612_ADDR, CONVERTION_RESULT_REG_START + (channel * 2), value);
+    raw_value |= (uint32_t)(((uint16_t)value[0] << 8) | value[1]) << 16;
+
+    /* Read LSW */
+    LDC1612_IIC_READ_16BITS(LDC1612_ADDR, CONVERTION_RESULT_REG_START + 1 + (channel * 2), value);
+    raw_value |= (uint32_t)(((uint16_t)value[0] << 8) | value[1]);
+
+    
+    uint32_t calibration_value = raw_value & 0x0FFFFFFF;
+    if (calibration_value == 0x0FFFFFFF) {
+        return 0xF0000000; /* No coil */
+    }
+    if (LDC1612_ERROR_CONFIG & 0xF800) {
+        uint8_t error_code = (uint8_t)(raw_value >> 24);
+        if (error_code & 0x80) return 0x80000000; /* Under range */
+        if (error_code & 0x40) return 0x40000000; /* Over range */
+        if (error_code & 0x20) return 0x20000000; /* Watchdog */
+        if (error_code & 0x10) return 0x10000000; /* Amplitude error */
+    }
+    
+    return raw_value;
+}
+
+
+void ldc1612_drvie_current_detect(uint8_t channel) {
+    uint8_t data[2] = {0};
+    uint16_t init_value = 0 , drive_current = 0;
+
+    ldc1612_write_register(SENSOR_CONFIG_REG, LDC1612_SLEEP_MODE);
+    delay_ms(10);
+    
+    uint16_t freq_divider = ldc1612_calculate_freq_divider(channel);
+    ldc1612_write_register(SET_FREQ_REG_START + channel, freq_divider);
+    delay_ms(5);
+
+    LDC1612_IIC_READ_16BITS(LDC1612_ADDR, SENSOR_CONFIG_REG, data);
+    // ldc1612_set_sensor_config(LDC1612_SLEEP_MODE);
+    ldc1612_write_register(SENSOR_CONFIG_REG, LDC1612_SLEEP_MODE);
+    delay_ms(10);
+    ldc1612_write_register(SENSOR_CONFIG_REG, LDC1612_SENSOR_CONFIG_CH0);
+    delay_ms(10);
+    LDC1612_IIC_READ_16BITS(LDC1612_ADDR, SET_DRIVER_CURRENT_REG, data);
+
+    init_value = (((data[0] << 8) | data[1]) >> 6) & 0x1F;
+    drive_current = (init_value << 11) | 0x0000;
+    printf("init value: 0x%x\tdrive current: 0x%x\n", init_value, drive_current);
+}
+
+/** @brief Get sensor status register
+    @return Status register value
+ * */
+uint16_t ldc1612_get_sensor_status(void) {
+    uint8_t data[2] = {0};
+    LDC1612_IIC_READ_16BITS(LDC1612_ADDR, SENSOR_STATUS_REG, data);
+    return (data[0] << 8) | data[1];
+}
+
+/** @brief Check if data is ready for specific channel
+    @param channel Channel to check (0 or 1)
+    @return true if data is ready, false otherwise
+ * */
+bool ldc1612_is_data_ready(uint8_t channel) {
+    uint16_t status = ldc1612_get_sensor_status();
+    if (channel == 0) {
+        return (status & 0x0040) != 0; // DRDY_0 bit
+    } else if (channel == 1) {
+        return (status & 0x0080) != 0; // DRDY_1 bit
+    }
+    return false;
+}
--- a/Src/led.c
+++ b/Src/led.c
@@ -1,20 +1,57 @@
 #include "led.h"

+/**
+ * @brief LED心跳指示灯功能
+ * @details 实现类似心跳的LED闪烁模式：快闪两次然后暂停
+ *          适合在SysTick中断中调用，通过计数器控制闪烁节拍
+ * @note 假设SysTick中断频率为1ms，心跳周期约为2秒
+ *       心跳模式：亮200ms->灭200ms->亮200ms->灭1400ms（循环）
+ */
+void led_heart_beat(void)
+{
+    static uint16_t heart_beat_counter = 0;
+    
+    // 心跳周期：2000ms (假设SysTick为1ms中断)
+    // 模式：亮200ms -> 灭200ms -> 亮200ms -> 灭1400ms
+    heart_beat_counter++;
+    
+    if (heart_beat_counter <= 200) {
+        // 第一次亮：0-200ms
+        led_on();
+    }
+    else if (heart_beat_counter <= 400) {
+        // 第一次灭：200-400ms  
+        led_off();
+    }
+    else if (heart_beat_counter <= 600) {
+        // 第二次亮：400-600ms
+        led_on();
+    }
+    else if (heart_beat_counter <= 2000) {
+        // 长时间灭：600-2000ms
+        led_off();
+    }
+    else {
+        // 重置计数器，开始新的心跳周期
+        heart_beat_counter = 0;
+    }
+}
+
 void led_init(void) {
    rcu_periph_clock_enable(LED_RCU);
    gpio_mode_set(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_PIN);
    gpio_output_options_set(LED_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, LED_PIN);
-    gpio_bit_reset(LED_PORT, LED_PIN);
-}
-
-void led_on(void) {
    gpio_bit_set(LED_PORT, LED_PIN);
 }

-void led_off(void) {
+void led_on(void) {
    gpio_bit_reset(LED_PORT, LED_PIN);
 }

+void led_off(void) {
+    gpio_bit_set(LED_PORT, LED_PIN);
+}
+
 void led_toggle(void) {
    gpio_bit_toggle(LED_PORT, LED_PIN);
 }
--- a/Src/main.c
+++ b/Src/main.c
@@ -36,7 +36,12 @@ OF SUCH DAMAGE.
 #include "systick.h"
 #include "uart.h"
 #include "led.h"
+#include "command.h"
 #include <stdio.h>
+#include "i2c.h"
+#include "board_config.h"
+#include "ldc1612.h"
+#include "tmp112.h"

 /*!
    \brief      main function
@@ -46,17 +51,65 @@ OF SUCH DAMAGE.
 */
 int main(void)
 {
-    systick_config();
-    uart0_init(115200);
-    // uart1_init(115200); // 如需使用USART1请初始化
-
-    // printf("Hello USART0!\r\n");
-    // uart_set_printf_port(UART_PRINTF_USART1); // 切换printf到USART1
-    // uart_set_printf_port(UART_PRINTF_BOTH);   // 同时输出到USART0和USART1
-
    led_init();
+    mcu_detect_and_config();
+
+    setbuf(stdout, NULL);
+    systick_config();
+    rs485_init();
+
+    // led_init();
+
+    printf("Flash size: %d Kbytes\n", get_flash_size());
+
+#ifdef DEBUG_VERBOSE
+    char hello_world[] = {"Hello World!\r\n"};
+
+    for (uint8_t i = 0; i < sizeof(hello_world); i++)
+    {
+        while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
+        usart_data_transmit(RS485_PHY, hello_world[i]);
+    }
+    
+    while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
+#endif
+
+    i2c_config();
+
+#ifdef DEBUG_VERBOSE
+    i2c_scan();
+
+    i2c_bus_reset();
+#endif
+
+    ldc1612_init();
+    ldc1612_config_single_channel(CHANNEL_0);
+
+    tmp112a_init();
+
+#ifdef EDDY_DRIVE_CURRENT_DETECTION
+    ldc1612_drvie_current_detect(CHANNEL_0);
+#endif
+
    while(1){
-        led_toggle();
-        delay_ms(200);
+#ifndef EDDY_DRIVE_CURRENT_DETECTION
+        command_process();
+        delay_ms(10);
+        if (g_eddy_current_sensor_report_enabled) 
+        eddy_current_report();
+        if (g_temperature_sensor_report_enabled) 
+        temperature_raw_value_report();
+
+
+
+
+
+#else
+        ldc1612_drvie_current_detect(CHANNEL_0);
+        delay_ms(1000);
+#endif
+        
+        
+        
    }
 }
--- a/Src/soft_i2c.c
+++ b/Src/soft_i2c.c
@@ -0,0 +1,234 @@
+//
+// Created by dell on 24-12-28.
+//
+
+#include "soft_i2c.h"
+
+/*!
+    \brief      delay
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void soft_i2c_delay(void) {
+    delay_10us(2); // Adjust delay as needed
+    /* delay to freq
+     *  15KHz: delay_us(20);
+     *  65KHz: delay_us(1);
+     */
+}
+
+/*!
+    \brief      configure the software IIC GPIO
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void soft_i2c_config(void) {
+    rcu_periph_clock_enable(RCU_GPIO_I2C);
+
+    gpio_mode_set(I2C_SCL_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, I2C_SCL_PIN);
+    gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
+
+    gpio_mode_set(I2C_SDA_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, I2C_SDA_PIN);
+    gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
+
+    I2C_SCL_HIGH();
+    I2C_SDA_HIGH();
+}
+
+/*!
+    \brief      generate I2C start signal
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void soft_i2c_start(void) {
+    I2C_SDA_HIGH();
+    I2C_SCL_HIGH();
+    soft_i2c_delay();
+    I2C_SDA_LOW();
+    soft_i2c_delay();
+    I2C_SCL_LOW();
+}
+
+/*!
+    \brief      generate I2C stop signal
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void soft_i2c_stop(void) {
+    I2C_SCL_LOW();   // 确保时钟为低
+    I2C_SDA_LOW();   // 拉低数据线
+    soft_i2c_delay();
+    I2C_SCL_HIGH();  // 拉高时钟
+    soft_i2c_delay();
+    I2C_SDA_HIGH();  // 在时钟高电平时拉高数据线产生停止条件
+    soft_i2c_delay(); // 添加缺失的延时
+}
+
+/*!
+    \brief      send I2C ACK signal
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void soft_i2c_send_ack(void) {
+    // sda_out();
+    I2C_SDA_LOW();
+    soft_i2c_delay();
+    I2C_SCL_HIGH();
+    soft_i2c_delay();
+    I2C_SCL_LOW();
+    soft_i2c_delay();
+    I2C_SDA_HIGH();
+}
+
+/*!
+    \brief      send I2C NACK signal
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void soft_i2c_send_nack(void) {
+    I2C_SDA_HIGH();
+    soft_i2c_delay();
+    I2C_SCL_HIGH();
+    soft_i2c_delay();
+    I2C_SCL_LOW();
+    soft_i2c_delay();
+    I2C_SDA_HIGH();
+}
+
+/*!
+    \brief      wait I2C ACK signal
+    \param[in]  none
+    \param[out] none
+    \retval     0: ACK received, 1: ACK not received
+*/
+uint8_t soft_i2c_wait_ack(void) {
+    I2C_SDA_HIGH();  // 释放SDA线，让从设备控制
+    soft_i2c_delay();
+    I2C_SCL_HIGH();  // 拉高时钟
+    soft_i2c_delay();
+    uint8_t ack = !I2C_SDA_READ();  // 读取ACK信号（低电平为ACK）
+    I2C_SCL_LOW();   // 拉低时钟
+    soft_i2c_delay(); // 添加缺失的延时
+    return ack;
+}
+
+/*!
+    \brief      send a byte via I2C
+    \param[in]  byte: byte to be sent
+    \param[out] none
+    \retval     none
+*/
+void soft_i2c_send_byte(uint8_t byte) {
+    // sda_out();
+    for (int i = 0; i < 8; i++) {
+        if (byte & 0x80) {
+            I2C_SDA_HIGH();
+        } else {
+            I2C_SDA_LOW();
+        }
+        byte <<= 1;
+        soft_i2c_delay();
+        I2C_SCL_HIGH();
+        soft_i2c_delay();
+        I2C_SCL_LOW();
+        soft_i2c_delay();
+    }
+}
+
+/*!
+    \brief      receive a byte via I2C
+    \param[in]  ack: 1: send ACK, 0: send NACK
+    \param[out] none
+    \retval     received byte
+*/
+uint8_t soft_i2c_receive_byte(uint8_t ack) {
+    uint8_t byte = 0;
+    I2C_SDA_HIGH();
+    for (int i = 0; i < 8; i++) {
+        byte <<= 1;
+        I2C_SCL_HIGH();
+        soft_i2c_delay();
+        if (I2C_SDA_READ()) {
+            byte |= 0x01;
+        }
+        I2C_SCL_LOW();
+        soft_i2c_delay();
+    }
+    if (ack) {
+        soft_i2c_send_ack();
+    } else {
+        soft_i2c_send_nack();
+    }
+    return byte;
+}
+
+uint8_t soft_i2c_write_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t data[2]) {
+    /* 参数验证 */
+    if (data == NULL || slave_addr > 0x7F) {
+        return SOFT_I2C_FAIL;
+    }
+
+    soft_i2c_start();
+    soft_i2c_send_byte(slave_addr << 1);  // 修复：左移1位，添加写位
+    if (!soft_i2c_wait_ack()) {
+        soft_i2c_stop();
+        return SOFT_I2C_FAIL;
+    }
+    soft_i2c_send_byte(reg_addr);
+    if (!soft_i2c_wait_ack()) {
+        soft_i2c_stop();
+        return SOFT_I2C_FAIL;
+    }
+    soft_i2c_send_byte(data[0]);
+    if (!soft_i2c_wait_ack()) {
+        soft_i2c_stop();
+        return SOFT_I2C_FAIL;
+    }
+    soft_i2c_send_byte(data[1]);
+    if (!soft_i2c_wait_ack()) {  // 修复：添加错误处理
+        soft_i2c_stop();
+        return SOFT_I2C_FAIL;
+    }
+    soft_i2c_stop();
+    return SOFT_I2C_OK;
+}
+
+uint8_t soft_i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data)
+{
+    /* 参数验证 */
+    if (data == NULL || slave_addr > 0x7F) {
+        return SOFT_I2C_FAIL;
+    }
+
+    /* 写阶段：发送寄存器地址 */
+    soft_i2c_start();
+    soft_i2c_send_byte(slave_addr << 1);  // 修复：左移1位，写操作
+    if (!soft_i2c_wait_ack()) {
+        soft_i2c_stop();
+        return SOFT_I2C_FAIL;
+    }
+    soft_i2c_send_byte(reg_addr);
+    if (!soft_i2c_wait_ack()) {
+        soft_i2c_stop();
+        return SOFT_I2C_FAIL;
+    }
+
+    /* 读阶段：重新开始并读取数据 */
+    soft_i2c_start();  // 重新开始
+    soft_i2c_send_byte((slave_addr << 1) | 0x01);  // 修复：正确的读地址
+    if (!soft_i2c_wait_ack()) {
+        soft_i2c_stop();
+        return SOFT_I2C_FAIL;
+    }
+    soft_i2c_delay();
+    data[0] = soft_i2c_receive_byte(1);  // 第一个字节发送ACK
+    data[1] = soft_i2c_receive_byte(0);  // 最后一个字节发送NACK
+    soft_i2c_stop();
+    return SOFT_I2C_OK;
+}
--- a/Src/syscalls.c
+++ b/Src/syscalls.c
@@ -16,6 +16,7 @@
 #include <unistd.h>
 #include <sys/wait.h>
 #include "gd32e23x_usart.h"
+#include "board_config.h"

 #undef errno
 extern int errno;
@@ -164,7 +165,7 @@ int _execve(char *name, char **argv, char **env)
 // USART0 printf重定向实现
 int __io_putchar(int ch) {
    // 等待发送缓冲区空
-    while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
-    usart_data_transmit(USART0, (uint8_t)ch);
+    while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
+    usart_data_transmit(RS485_PHY, (uint8_t)ch);
    return ch;
 }
--- a/Src/systick.c
+++ b/Src/systick.c
@@ -1,83 +1,118 @@
-/*!
-    \file  systick.c
-    \brief the systick configuration file
-    
-    \version 2025-02-10, V2.4.0, demo for GD32E23x
+/**
+ * ************************************************************************
+ *
+ * @file systick.c
+ * @author GD32
+ * @brief 通过 SysTick 定时器进行微秒级别和毫秒级别的延时函数
+ *
+ * ************************************************************************
+ * @copyright Copyright (c) 2024 GD32
+ * ************************************************************************
 */
-
-/*
-    Copyright (c) 2025, GigaDevice Semiconductor Inc.
-
-    Redistribution and use in source and binary forms, with or without modification, 
-are permitted provided that the following conditions are met:
-
-    1. Redistributions of source code must retain the above copyright notice, this 
-       list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright notice, 
-       this list of conditions and the following disclaimer in the documentation 
-       and/or other materials provided with the distribution.
-    3. Neither the name of the copyright holder nor the names of its contributors 
-       may be used to endorse or promote products derived from this software without 
-       specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
-IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
-NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
-WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
-OF SUCH DAMAGE.
-*/
-
 #include "gd32e23x.h"
 #include "systick.h"

-volatile static uint32_t delay;
+volatile static uint32_t delay_count = 0;

-/*!
-    \brief      configure systick
-    \param[in]  none
-    \param[out] none
-    \retval     none
+/**
+ * ************************************************************************
+ * @brief 配置 SysTick 定时器
+ *
+ *
+ * ************************************************************************
 */
 void systick_config(void)
 {
-    /* setup systick timer for 1000Hz interrupts */
-    if (SysTick_Config(SystemCoreClock / 1000U)){
-        /* capture error */
-        while (1){
-        }
-    }
-    /* configure the systick handler priority */
+    //设置了 SysTick 定时器的时钟源为 HCLK
+    systick_clksource_set(SYSTICK_CLKSOURCE_HCLK);
+    
+    // 配置SysTick为1ms周期中断
+    // 注意：SysTick_Config会自动设置时钟源为HCLK，所以需要使用SystemCoreClock/1000
+    SysTick_Config(SystemCoreClock / 1000U);  // 1ms中断
    NVIC_SetPriority(SysTick_IRQn, 0x00U);
 }

-/*!
-    \brief      delay a time in milliseconds
-    \param[in]  count: count in milliseconds
-    \param[out] none
-    \retval     none
+/**
+ * ************************************************************************
+ * @brief delay_ms 毫秒延时函数
+ *
+ * @param[in] count  毫秒值
+ *
+ * ************************************************************************
+ */
+void delay_10us(uint32_t count)
+{
+    // 基于系统时钟的简单循环延时
+    // 这是一个粗略的估计，实际延时可能有偏差  实测10.2us
+    uint32_t loops_per_10us = SystemCoreClock / 1700000; // 粗略估计，每10微秒的循环次数
+
+    for(uint32_t i = 0; i < count; i++) {
+        for(volatile uint32_t j = 0; j < loops_per_10us; j++);
+    }
+}
+
+/**
+ * ************************************************************************
+ * @brief delay_ms 毫秒延时函数
+ *
+ * @param[in] count  毫秒值
+ *
+ * ************************************************************************
 */
 void delay_ms(uint32_t count)
 {
-    delay = count;
-
-    while(0U != delay){
-    }
+    delay_count = count; // 设置延时计数
+    while (delay_count != 0U);
 }

-/*!
-    \brief      delay decrement
-    \param[in]  none
-    \param[out] none
-    \retval     none
+/**
+ * ************************************************************************
+ * @brief 每个 SysTick 中断调用时，减少延时计数
+ *
+ * @param[in] void
+ *
+ * ************************************************************************
 */
 void delay_decrement(void)
 {
-    if (0U != delay){
-        delay--;
+    if (delay_count != 0U)
+    {
+            delay_count--;
    }
 }
+
+// /**
+//  * ************************************************************************
+//  * @brief delay_ms_safe 毫秒延时函数（不干扰SysTick中断）
+//  * @details 使用简单循环实现延时，不会重新配置SysTick
+//  * @param[in] count  毫秒值
+//  * ************************************************************************
+//  */
+// void delay_ms_safe(uint32_t count)
+// {
+//     // 基于系统时钟的简单循环延时
+//     // 这是一个粗略的估计，实际延时可能有偏差
+//     uint32_t loops_per_ms = SystemCoreClock / 14000; // 粗略估计
+
+//     for(uint32_t i = 0; i < count; i++) {
+//         for(volatile uint32_t j = 0; j < loops_per_ms; j++);
+//     }
+// }
+
+// /**
+//  * ************************************************************************
+//  * @brief delay_us_safe 微秒延时函数（不干扰SysTick中断）
+//  * @details 使用简单循环实现延时，不会重新配置SysTick
+//  * @param[in] count  微秒值
+//  * ************************************************************************
+//  */
+// void delay_us_safe(uint32_t count)
+// {
+//     // 基于系统时钟的简单循环延时
+//     // 这是一个粗略的估计，实际延时可能有偏差
+//     uint32_t loops_per_us = SystemCoreClock / 22000000; // 粗略估计，每微秒的循环次数
+
+//     for(uint32_t i = 0; i < count; i++) {
+//         for(volatile uint32_t j = 0; j < loops_per_us; j++);
+//     }
+// }
--- a/Src/tmp112.c
+++ b/Src/tmp112.c
@@ -0,0 +1,328 @@
+//
+// Created by dell on 24-12-20.
+// TMP112A Temperature Sensor Driver Implementation
+//
+
+#include "tmp112.h"
+
+/* Private function prototypes */
+static i2c_result_t tmp112a_write_register(uint8_t reg_addr, uint16_t value);
+static i2c_result_t tmp112a_read_register(uint8_t reg_addr, uint16_t *value);
+static float tmp112a_raw_to_celsius(uint16_t raw_data);
+static uint16_t tmp112a_celsius_to_raw(float temperature);
+
+/*!
+    \brief      初始化TMP112A传感器
+    \param[in]  none
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_init(void) {
+    i2c_result_t i2c_status;
+    
+    /* 配置传感器为默认设置 */
+    i2c_status = tmp112a_config(TMP112A_CONFIG_DEFAULT);
+    if (i2c_status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 等待配置生效 */
+    delay_ms(1);
+    
+    return TMP112A_STATUS_SUCCESS;
+}
+
+/*!
+    \brief      配置TMP112A传感器
+    \param[in]  config: 配置值
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_config(uint16_t config) {
+    i2c_result_t status = tmp112a_write_register(TMP112A_CONFIG_REG, config);
+    return (status == I2C_RESULT_SUCCESS) ? TMP112A_STATUS_SUCCESS : TMP112A_STATUS_ERROR;
+}
+
+/*!
+    \brief      读取温度
+    \param[in]  none
+    \param[out] result: 结果结构体指针
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_read_temperature(tmp112a_result_t *result) {
+    uint16_t raw_data;
+    i2c_result_t status;
+    
+    if (result == NULL) {
+        return TMP112A_STATUS_INVALID_PARAM;
+    }
+    
+    /* 读取温度寄存器 */
+    status = tmp112a_read_register(TMP112A_TEMP_REG, &raw_data);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 解析温度数据 */
+    result->raw_data = raw_data;
+    result->temperature_c = tmp112a_raw_to_celsius(raw_data);
+    result->temperature_f = result->temperature_c * 9.0f / 5.0f + 32.0f;
+    
+    /* 检查温度范围 */
+    if (result->temperature_c < TMP112A_TEMP_MIN || result->temperature_c > TMP112A_TEMP_MAX) {
+        return TMP112A_STATUS_OUT_OF_RANGE;
+    }
+    
+    /* 检查报警标志 */
+    uint16_t config_reg;
+    status = tmp112a_read_register(TMP112A_CONFIG_REG, &config_reg);
+    if (status == I2C_RESULT_SUCCESS) {
+        result->alert_flag = (config_reg & TMP112A_CONFIG_AL) ? true : false;
+    } else {
+        result->alert_flag = false;
+    }
+    
+    return TMP112A_STATUS_SUCCESS;
+}
+
+void tmp112a_get_raw_temperature_value(uint8_t *value) {
+    i2c_read_16bits(TMP112A_ADDR, TMP112A_TEMP_REG, value);
+    return;
+}
+
+/*!
+    \brief      设置温度阈值
+    \param[in]  low_temp: 低温阈值 (°C)
+    \param[in]  high_temp: 高温阈值 (°C)
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_set_thresholds(float low_temp, float high_temp) {
+    uint16_t low_raw, high_raw;
+    i2c_result_t status;
+    
+    /* 参数验证 */
+    if (low_temp < TMP112A_TEMP_MIN || low_temp > TMP112A_TEMP_MAX ||
+        high_temp < TMP112A_TEMP_MIN || high_temp > TMP112A_TEMP_MAX ||
+        low_temp >= high_temp) {
+        return TMP112A_STATUS_INVALID_PARAM;
+    }
+    
+    /* 转换温度为原始值 */
+    low_raw = tmp112a_celsius_to_raw(low_temp);
+    high_raw = tmp112a_celsius_to_raw(high_temp);
+    
+    /* 写入低温阈值 */
+    status = tmp112a_write_register(TMP112A_TLOW_REG, low_raw);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 写入高温阈值 */
+    status = tmp112a_write_register(TMP112A_THIGH_REG, high_raw);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    return TMP112A_STATUS_SUCCESS;
+}
+
+/*!
+    \brief      进入关机模式
+    \param[in]  none
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_shutdown(void) {
+    uint16_t config_reg;
+    i2c_result_t status;
+    
+    /* 读取当前配置 */
+    status = tmp112a_read_register(TMP112A_CONFIG_REG, &config_reg);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 设置关机位 */
+    config_reg |= TMP112A_CONFIG_SD;
+    
+    /* 写回配置 */
+    status = tmp112a_write_register(TMP112A_CONFIG_REG, config_reg);
+    return (status == I2C_RESULT_SUCCESS) ? TMP112A_STATUS_SUCCESS : TMP112A_STATUS_ERROR;
+}
+
+/*!
+    \brief      退出关机模式
+    \param[in]  none
+    \param[out] none
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_wakeup(void) {
+    uint16_t config_reg;
+    i2c_result_t status;
+    
+    /* 读取当前配置 */
+    status = tmp112a_read_register(TMP112A_CONFIG_REG, &config_reg);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 清除关机位 */
+    config_reg &= ~TMP112A_CONFIG_SD;
+    
+    /* 写回配置 */
+    status = tmp112a_write_register(TMP112A_CONFIG_REG, config_reg);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 等待传感器启动 */
+    delay_ms(1);
+    
+    return TMP112A_STATUS_SUCCESS;
+}
+
+/*!
+    \brief      单次转换
+    \param[in]  none
+    \param[out] result: 结果结构体指针
+    \retval     tmp112a_status_t
+*/
+tmp112a_status_t tmp112a_one_shot(tmp112a_result_t *result) {
+    uint16_t config_reg;
+    i2c_result_t status;
+    uint8_t timeout = 100; // 100ms超时
+    
+    if (result == NULL) {
+        return TMP112A_STATUS_INVALID_PARAM;
+    }
+    
+    /* 读取当前配置 */
+    status = tmp112a_read_register(TMP112A_CONFIG_REG, &config_reg);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 启动单次转换 */
+    config_reg |= TMP112A_CONFIG_OS;
+    status = tmp112a_write_register(TMP112A_CONFIG_REG, config_reg);
+    if (status != I2C_RESULT_SUCCESS) {
+        return TMP112A_STATUS_ERROR;
+    }
+    
+    /* 等待转换完成 */
+    do {
+        delay_ms(1);
+        status = tmp112a_read_register(TMP112A_CONFIG_REG, &config_reg);
+        if (status != I2C_RESULT_SUCCESS) {
+            return TMP112A_STATUS_ERROR;
+        }
+        timeout--;
+    } while ((config_reg & TMP112A_CONFIG_OS) && timeout > 0);
+    
+    if (timeout == 0) {
+        return TMP112A_STATUS_TIMEOUT;
+    }
+    
+    /* 读取转换结果 */
+    return tmp112a_read_temperature(result);
+}
+
+/*!
+    \brief      获取状态字符串
+    \param[in]  status: 状态码
+    \param[out] none
+    \retval     const char* 状态字符串
+*/
+const char* tmp112a_get_status_string(tmp112a_status_t status) {
+    switch (status) {
+        case TMP112A_STATUS_SUCCESS:
+            return "SUCCESS";
+        case TMP112A_STATUS_ERROR:
+            return "ERROR";
+        case TMP112A_STATUS_TIMEOUT:
+            return "TIMEOUT";
+        case TMP112A_STATUS_INVALID_PARAM:
+            return "INVALID_PARAM";
+        case TMP112A_STATUS_OUT_OF_RANGE:
+            return "OUT_OF_RANGE";
+        default:
+            return "UNKNOWN";
+    }
+}
+
+/* Private Functions Implementation */
+
+/*!
+    \brief      写入寄存器
+    \param[in]  reg_addr: 寄存器地址
+    \param[in]  value: 写入值
+    \param[out] none
+    \retval     i2c_result_t
+*/
+static i2c_result_t tmp112a_write_register(uint8_t reg_addr, uint16_t value) {
+    uint8_t data[2];
+    data[0] = (value >> 8) & 0xFF;
+    data[1] = value & 0xFF;
+
+    return i2c_write_16bits(TMP112A_ADDR, reg_addr, data);
+}
+
+/*!
+    \brief      读取寄存器
+    \param[in]  reg_addr: 寄存器地址
+    \param[out] value: 读取值指针
+    \retval     i2c_result_t
+*/
+static i2c_result_t tmp112a_read_register(uint8_t reg_addr, uint16_t *value) {
+    uint8_t data[2];
+    i2c_result_t status;
+
+    if (value == NULL) {
+        return I2C_RESULT_INVALID_PARAM;
+    }
+
+    status = i2c_read_16bits(TMP112A_ADDR, reg_addr, data);
+    if (status == I2C_RESULT_SUCCESS) {
+        *value = ((uint16_t)data[0] << 8) | data[1];
+    }
+
+    return status;
+}
+
+/*!
+    \brief      将原始数据转换为摄氏度
+    \param[in]  raw_data: 原始数据
+    \param[out] none
+    \retval     float 温度值(°C)
+*/
+static float tmp112a_raw_to_celsius(uint16_t raw_data) {
+    int16_t temp_raw;
+
+    /* TMP112A使用12位分辨率，数据在高12位 */
+    temp_raw = (int16_t)(raw_data >> 4);
+
+    /* 处理负数 */
+    if (temp_raw & 0x800) {
+        temp_raw |= 0xF000; // 符号扩展
+    }
+
+    /* 转换为摄氏度 */
+    return (float)temp_raw * TMP112A_TEMP_RESOLUTION;
+}
+
+/*!
+    \brief      将摄氏度转换为原始数据
+    \param[in]  temperature: 温度值(°C)
+    \param[out] none
+    \retval     uint16_t 原始数据
+*/
+static uint16_t tmp112a_celsius_to_raw(float temperature) {
+    int16_t temp_raw;
+
+    /* 转换为原始值 */
+    temp_raw = (int16_t)(temperature / TMP112A_TEMP_RESOLUTION);
+
+    /* 移位到高12位 */
+    return (uint16_t)(temp_raw << 4);
+}
--- a/Src/uart.c
+++ b/Src/uart.c
@@ -2,65 +2,106 @@
 #include "gd32e23x_usart.h"
 #include "gd32e23x_rcu.h"
 #include "gd32e23x_gpio.h"
+#include "board_config.h"
+#include "uart_ring_buffer.h"


-void uart0_init(uint32_t baudrate) {
+void rs485_init(void) {
+
+    #ifndef RS485_MAX13487
    /* 使能 GPIOA 和 USART0 时钟 */
-    rcu_periph_clock_enable(RCU_GPIOA);
-    rcu_periph_clock_enable(RCU_USART0);
+    rcu_periph_clock_enable(RS485_GPIO_RCU);
+    rcu_periph_clock_enable(RS485_RCU);

-    /* 配置 PA9 为 USART0_TX，PA10 为 USART0_RX */
-    gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_9 | GPIO_PIN_10);
-    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9 | GPIO_PIN_10);
-    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9 | GPIO_PIN_10);
+    /* 配置 PA2 为 USART0_TX，PA3 为 USART0_RX */
+    gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, RS485_TX_PIN | RS485_RX_PIN | RS485_EN_PIN);
+
+    gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, RS485_TX_PIN | RS485_RX_PIN);
+    gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_TX_PIN | RS485_RX_PIN);
+
+    gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE, RS485_EN_PIN);
+    gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_EN_PIN);

    /* 配置波特率、数据位、停止位等 */
-    usart_deinit(USART0);
-    usart_baudrate_set(USART0, baudrate);
-    usart_receive_config(USART0, USART_RECEIVE_ENABLE);
-    usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
-    usart_enable(USART0);
+    usart_deinit(RS485_PHY);
+    usart_word_length_set(RS485_PHY, USART_WL_8BIT);
+    usart_stop_bit_set(RS485_PHY, USART_STB_1BIT);
+    usart_parity_config(RS485_PHY, USART_PM_NONE);
+    usart_baudrate_set(RS485_PHY, RS485_BAUDRATE);
+    usart_receive_config(RS485_PHY, USART_RECEIVE_ENABLE);
+    usart_transmit_config(RS485_PHY, USART_TRANSMIT_ENABLE);
+
+    usart_driver_assertime_config(RS485_PHY, 0x01);
+    usart_driver_deassertime_config(RS485_PHY, 0x10);
+
+    usart_rs485_driver_enable(RS485_PHY);
+
+    usart_enable(RS485_PHY);
+
+    nvic_irq_enable(RS485_IRQ, 0);
+    usart_interrupt_enable(RS485_PHY, USART_INT_RBNE);
+    // usart_interrupt_enable(RS485_PHY, USART_INT_IDLE);
+
+    #else
+    rcu_periph_clock_enable(RS485_GPIO_RCU);
+    rcu_periph_clock_enable(RS485_RCU);
+
+    gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
+
+    /* configure USART Tx&Rx as alternate function push-pull */
+    gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, RS485_TX_PIN | RS485_RX_PIN);
+    gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, RS485_TX_PIN | RS485_RX_PIN);
+
+    /* configure RS485 EN Pin */
+    gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, RS485_EN_PIN);
+    gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_EN_PIN);
+    gpio_bit_write(RS485_GPIO_PORT, RS485_EN_PIN, SET);
+
+    /* USART configure */
+    usart_deinit(RS485_PHY);
+    usart_baudrate_set(RS485_PHY, RS485_BAUDRATE);
+    usart_receive_config(RS485_PHY, USART_RECEIVE_ENABLE);
+    usart_transmit_config(RS485_PHY, USART_TRANSMIT_ENABLE);
+
+    usart_enable(RS485_PHY);
+
+    nvic_irq_enable(USART0_IRQn, 0);
+    usart_interrupt_enable(RS485_PHY, USART_INT_RBNE);
+    usart_interrupt_enable(RS485_PHY, USART_INT_IDLE);
+
+    #endif // RS485_MAX13487
    }

-void uart1_init(uint32_t baudrate) {
-    rcu_periph_clock_enable(RCU_GPIOA);
-    rcu_periph_clock_enable(RCU_USART1);
-    // USART1 默认引脚为 PA2 (TX), PA3 (RX)
-    gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
-    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2 | GPIO_PIN_3);
-    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_2 | GPIO_PIN_3);
-    usart_deinit(USART1);
-    usart_baudrate_set(USART1, baudrate);
-    usart_receive_config(USART1, USART_RECEIVE_ENABLE);
-    usart_transmit_config(USART1, USART_TRANSMIT_ENABLE);
-    usart_enable(USART1);
+/******************************************************************************/
+/* 具体的中断处理函数实现 */
+/******************************************************************************/
+
+void usart0_irq_handler(void) {
+    // 处理USART0的接收中断
+    if(usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE)) {
+        uint8_t data = usart_data_receive(USART0);
+        // 使用原有的环形缓冲区处理逻辑
+        (void)uart_ring_buffer_put(data); // 缓冲满时丢弃，返回值可用于统计
    }
    
-static uart_printf_port_t g_printf_port = UART_PRINTF_USART0;
-
-void uart_set_printf_port(uart_printf_port_t port) {
-    g_printf_port = port;
+    // 处理USART0的空闲中断
+    if(usart_interrupt_flag_get(USART0, USART_INT_FLAG_IDLE)) {
+        usart_interrupt_flag_clear(USART0, USART_INT_FLAG_IDLE);
+        // 在这里添加空闲中断处理逻辑
+    }
 }

-// printf 重定向，支持多串口
-int __io_putchar(int ch) {
-    switch (g_printf_port) {
-        case UART_PRINTF_USART0:
-            while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
-            usart_data_transmit(USART0, (uint8_t)ch);
-            break;
-        case UART_PRINTF_USART1:
-            while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
-            usart_data_transmit(USART1, (uint8_t)ch);
-            break;
-        case UART_PRINTF_BOTH:
-            while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
-            usart_data_transmit(USART0, (uint8_t)ch);
-            while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
-            usart_data_transmit(USART1, (uint8_t)ch);
-            break;
-        default:
-            break;
+void usart1_irq_handler(void) {
+    // 处理USART1的接收中断
+    if(usart_interrupt_flag_get(USART1, USART_INT_FLAG_RBNE)) {
+        uint8_t data = usart_data_receive(USART1);
+        // 使用原有的环形缓冲区处理逻辑
+        (void)uart_ring_buffer_put(data); // 缓冲满时丢弃，返回值可用于统计
+    }
+    
+    // 处理USART1的空闲中断
+    if(usart_interrupt_flag_get(USART1, USART_INT_FLAG_IDLE)) {
+        usart_interrupt_flag_clear(USART1, USART_INT_FLAG_IDLE);
+        // 在这里添加空闲中断处理逻辑
    }
-    return ch;
 }
--- a/Src/uart_ring_buffer.c
+++ b/Src/uart_ring_buffer.c
@@ -0,0 +1,104 @@
+/**
+ * @file uart_ring_buffer.c
+ * @brief 字节环形接收缓冲区的实现。
+ * @details 适用于中断接收（写）与主循环解析（读）的典型串口场景；
+ *          采用“预留一格”区分空/满，最大可用容量为 UART_RX_BUFFER_SIZE-1。
+ * @ingroup RingBuffer
+ */
+#include "uart_ring_buffer.h"
+
+static volatile uint8_t uart_rx_buffer[UART_RX_BUFFER_SIZE];
+static volatile uint8_t write_index = 0;
+static volatile uint8_t read_index = 0;
+static volatile uint32_t dropped_bytes = 0;
+
+/**
+ * @brief 重置环形缓冲区状态。
+ * @details 将读指针、写指针与丢弃计数清零，不清空数据区内容。
+ * @note 内部工具函数；对外请优先使用 uart_ring_buffer_init()/uart_ring_buffer_clear()。
+ * @ingroup RingBuffer
+ */
+static void uart_ring_buffer_reset_state(void) {
+    write_index = 0;
+    read_index = 0;
+    dropped_bytes = 0;
+}
+
+/**
+ * @brief 初始化环形缓冲区。
+ * @details 调用内部重置逻辑，复位读写索引与丢弃计数，准备接收数据。
+ * @note 若在中断环境使用，初始化前建议关闭相关接收中断以避免并发竞争。
+ * @ingroup RingBuffer
+ */
+void uart_ring_buffer_init(void) {
+    uart_ring_buffer_reset_state();
+}
+
+/**
+ * @brief 获取当前可读的字节数。
+ * @details 通过读/写指针的快照计算可读长度，范围为 [0, UART_RX_BUFFER_SIZE-1]。
+ * @return uint8_t 可读字节数。
+ * @note 预留一个空槽区分“空/满”，因此满时返回 UART_RX_BUFFER_SIZE-1。
+ * @ingroup RingBuffer
+ */
+uint8_t uart_ring_buffer_available(void) {
+    /* 使用快照减少并发不一致窗口 */
+    uint8_t w = write_index;
+    uint8_t r = read_index;
+    return (uint8_t)((w + UART_RX_BUFFER_SIZE - r) % UART_RX_BUFFER_SIZE);
+}
+
+/**
+ * @brief 从环形缓冲区读取一个字节。
+ * @details 若缓冲区非空，返回队头字节并推进读指针；若为空，返回 -1。
+ * @return int 读取到的字节（0..255），或 -1 表示缓冲区为空。
+ * @ingroup RingBuffer
+ */
+int uart_ring_buffer_get(void) {
+    if (read_index == write_index) return -1; // 空
+    uint8_t data = uart_rx_buffer[read_index];
+    read_index = (read_index + 1) % UART_RX_BUFFER_SIZE;
+    return data;
+}
+
+/**
+ * @brief 向环形缓冲区写入一个字节。
+ * @details 尝试写入一个新字节；若缓冲区已满则丢弃并计数。
+ * @param data 待写入的字节。
+ * @return bool 是否写入成功。
+ * @retval true  写入成功。
+ * @retval false 写入失败（缓冲区已满，数据被丢弃并计数）。
+ * @note 如需“覆盖写入”策略，可在满时先推进读指针再写入。
+ * @ingroup RingBuffer
+ */
+bool uart_ring_buffer_put(uint8_t data) {
+    uint8_t next = (write_index + 1) % UART_RX_BUFFER_SIZE;
+    if (next != read_index) { // 缓冲区未满
+        uart_rx_buffer[write_index] = data;
+        write_index = next;
+        return true;
+    } else {
+        /* 缓冲区已满，丢弃新字节并计数 */
+        dropped_bytes++;
+        return false;
+    }
+}
+
+/**
+ * @brief 清空环形缓冲区。
+ * @details 复位读写索引与丢弃计数，相当于逻辑上丢弃所有已接收数据，不擦除数据区内容。
+ * @ingroup RingBuffer
+ */
+void uart_ring_buffer_clear(void) {
+    uart_ring_buffer_reset_state();
+}
+
+/**
+ * @brief 获取因满而被丢弃的字节累计数量。
+ * @details 写入时缓冲区满会丢弃新字节并累加计数；该计数在 init/clear 时清零。
+ * @return uint32_t 丢弃的累计字节数。
+ * @ingroup RingBuffer
+ */
+uint32_t uart_ring_buffer_drop_count(void) {
+    return dropped_bytes;
+}
--- a/cmake/project_config.cmake
+++ b/cmake/project_config.cmake
@@ -7,8 +7,8 @@ set(VERSION "V${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")
 string(TIMESTAMP BUILD_DATE "%Y-%m-%d")

 # 编译条件（如IIC类型等）
-set(IIC_TYPE "AutoDetectDriveCurrent")
-# set(IIC_TYPE "HW-IIC")
+# set(IIC_TYPE "AutoDetectDriveCurrent")
+set(IIC_TYPE "HW-IIC")

 # 其它自定义宏
 add_definitions(-DIIC_TYPE=${IIC_TYPE})
--- a/DriveConfiguration.pdf
+++ b/DriveConfiguration.pdf
--- a/doc/Texas_Instruments-LDC1612QDNTTQ1-datasheet.pdf
+++ b/doc/Texas_Instruments-LDC1612QDNTTQ1-datasheet.pdf
--- a/doc/采用
+++ b/doc/采用
Author	SHA1	Message	Date
yelvlab	233576fd9a	test	2025-08-21 17:12:04 +08:00
yelvlab	b78c1e416a	detect MCU flash size to config diff usart	2025-08-21 00:39:30 +08:00
yelvlab	b6485c5c39	add tmp112a code	2025-08-18 00:18:21 +08:00
yelvlab	443e9bf8f2	fix H-file	2025-08-17 18:01:01 +08:00
yelvlab	b60cfbee97	Delete useless file	2025-08-17 03:10:50 +08:00
yelvlab	9b3cd46b09	clear repo	2025-08-17 03:06:46 +08:00
yelvlab	5cdd7ca58c	release dev branch	2025-08-17 02:58:32 +08:00