diff --git a/CMakeLists.txt b/CMakeLists.txt
index 402aeb4..f34035c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,6 +30,7 @@ set(TARGET_C_SRC
         ${CMAKE_SOURCE_DIR}/src/led.c
         ${CMAKE_SOURCE_DIR}/src/i2c.c
         ${CMAKE_SOURCE_DIR}/src/soft_i2c.c
+        ${CMAKE_SOURCE_DIR}/src/fwdgt.c
 )
 
 add_executable(xlsw_3dp_LDC1612 ${TARGET_C_SRC})
diff --git a/inc/board_config.h b/inc/board_config.h
index 5a8314c..c8a2284 100644
--- a/inc/board_config.h
+++ b/inc/board_config.h
@@ -11,14 +11,13 @@
 
 /******************************************************************************/
 
-#define I2C_SPEED       20000
-#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 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
 
 /******************************************************************************/
 
@@ -33,4 +32,13 @@
 
 /******************************************************************************/
 
+#define LED_PORT             GPIOA
+#define LED_PIN              GPIO_PIN_7
+#define LED_RCU              RCU_GPIOA
+#define LED_BLINK_TIMER_RCU  RCU_TIMER16
+#define LED_BLINK_TIMER      TIMER16
+#define LED_BLINK_IRQ        TIMER16_IRQn
+
+/******************************************************************************/
+
 #endif //BOARD_CONFIG_H
diff --git a/inc/fwdgt.h b/inc/fwdgt.h
new file mode 100644
index 0000000..28da74c
--- /dev/null
+++ b/inc/fwdgt.h
@@ -0,0 +1,15 @@
+//
+// Created by yelv1 on 24-12-29.
+//
+
+#ifndef FWDGT_H
+#define FWDGT_H
+
+#include "gd32e23x.h"
+#include "board_config.h"
+
+void watchdog_init(void);
+
+void fwdgt_reset_mcu(void);
+
+#endif //FWDGT_H
diff --git a/inc/i2c.h b/inc/i2c.h
index 67645b2..ea09aa7 100644
--- a/inc/i2c.h
+++ b/inc/i2c.h
@@ -19,13 +19,7 @@
 
 /******************************************************************************/
 
-#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 I2C_SPEED       20000
 
 #define I2C_TIME_OUT    (uint16_t)(5000)
 #define I2C_OK          1
diff --git a/inc/led.h b/inc/led.h
index b3fb0c9..b02d4ee 100644
--- a/inc/led.h
+++ b/inc/led.h
@@ -6,24 +6,7 @@
 #define LED_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>
-
-/******************************************************************************/
-
-#define LED_PORT            GPIOA
-#define LED_PIN             GPIO_PIN_7
-#define LED_RCU             RCU_GPIOA
-#define LED_TIMER_RCU       RCU_TIMER16
-#define LED_TIMER           TIMER16
-#define LED_IRQ             TIMER16_IRQn
-
-/******************************************************************************/
+#include "board_config.h"
 
 void led_config(void);
 
diff --git a/inc/main.h b/inc/main.h
index 88b766c..8c8dca8 100644
--- a/inc/main.h
+++ b/inc/main.h
@@ -35,10 +35,21 @@ OF SUCH DAMAGE.
 #ifndef MAIN_H
 #define MAIN_H
 
-// #define DEBUG_VERBOES
+#include <stdio.h>
+#include "gd32e23x.h"
+#include "systick.h"
+#include "gd32e23x_libopt.h"
+#include "rs485.h"
+#include "led.h"
+#include "i2c.h"
+#include "ldc1612.h"
+#include "fwdgt.h"
+#include "board_config.h"
 
-void watchdog_init(void);
-
-void reset_mcu(void);
+#ifdef SOFTWARE_IIC
+#include "soft_i2c.h"
+#else
+#include "i2c.h"
+#endif
 
 #endif /* MAIN_H */
diff --git a/inc/rs485.h b/inc/rs485.h
index dbc5b94..2f7b139 100644
--- a/inc/rs485.h
+++ b/inc/rs485.h
@@ -8,25 +8,11 @@
 #include "gd32e23x_it.h"
 #include "gd32e23x.h"
 #include "systick.h"
-#include <stdbool.h>
-#include <string.h>
 #include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include "i2c.h"
 #include "ldc1612.h"
 #include "tmp112.h"
-
-/******************************************************************************/
-
-#define RS485_RCU            RCU_USART0
-#define RS485_GPIO_RCU       RCU_GPIOA
-#define RS485_GPIO_PORT      GPIOA
-#define RS485_TX_PIN         GPIO_PIN_2
-#define RS485_RX_PIN         GPIO_PIN_3
-#define RS485_PHY            USART0
-#define RS485_BAUDRATE       115200U
-#define RS485_EN_PIN         GPIO_PIN_1
+#include "fwdgt.h"
+#include "board_config.h"
 
 /******************************************************************************/
 
diff --git a/inc/tmp112.h b/inc/tmp112.h
index 29b2436..226013a 100644
--- a/inc/tmp112.h
+++ b/inc/tmp112.h
@@ -7,12 +7,6 @@
 
 #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"
 
@@ -28,6 +22,8 @@
 
 /******************************************************************************/
 
+#define TMP112A_TEMP_REG     0x00
+
 uint32_t tmp112a_get_raw_channel_result(void);
 
 #endif //TMP112_H
diff --git a/src/fwdgt.c b/src/fwdgt.c
new file mode 100644
index 0000000..b933237
--- /dev/null
+++ b/src/fwdgt.c
@@ -0,0 +1,28 @@
+//
+// Created by yelv1 on 24-12-29.
+//
+
+#include "fwdgt.h"
+
+void watchdog_init(void) {
+    /* Enable the LSI clock */
+    rcu_osci_on(RCU_IRC40K);
+    rcu_osci_stab_wait(RCU_IRC40K);
+
+    /* Configure FWDGT counter clock: 40KHz(IRC40K) / 64 = 0.625 KHz */
+    fwdgt_config(625, FWDGT_PSC_DIV64); // Set timeout to 1 seconds (625 / 0.625 KHz)
+
+    /* Enable FWDGT */
+    fwdgt_enable();
+}
+
+void fwdgt_reset_mcu(void) {
+    /* Enable the write access to the FWDGT_CTL register */
+    FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
+
+    /* Configure FWDGT to trigger a system reset */
+    fwdgt_config(50, FWDGT_PSC_DIV4);
+
+    /* Reload the counter to trigger the reset */
+    fwdgt_counter_reload();
+}
\ No newline at end of file
diff --git a/src/gd32e23x_it.c b/src/gd32e23x_it.c
index 44c7960..6893a93 100644
--- a/src/gd32e23x_it.c
+++ b/src/gd32e23x_it.c
@@ -103,15 +103,15 @@ void SysTick_Handler(void) {
   * @retval None
   */
 void TIMER16_IRQHandler(void) {
-    if (timer_interrupt_flag_get(LED_TIMER, TIMER_INT_FLAG_UP) == SET) {
-        timer_interrupt_flag_clear(LED_TIMER, TIMER_INT_FLAG_UP);
+    if (timer_interrupt_flag_get(LED_BLINK_TIMER, TIMER_INT_FLAG_UP) == SET) {
+        timer_interrupt_flag_clear(LED_BLINK_TIMER, TIMER_INT_FLAG_UP);
         static uint8_t led_status = 0;
         if (led_status) {
             gpio_bit_write(LED_PORT, LED_PIN, RESET);
-            timer_autoreload_value_config(LED_TIMER, 19200);
+            timer_autoreload_value_config(LED_BLINK_TIMER, 19200);
         } else {
             gpio_bit_write(LED_PORT, LED_PIN, SET);
-            timer_autoreload_value_config(LED_TIMER, 800);
+            timer_autoreload_value_config(LED_BLINK_TIMER, 800);
         }
         led_status = !led_status;
     }
diff --git a/src/led.c b/src/led.c
index f203941..31df075 100644
--- a/src/led.c
+++ b/src/led.c
@@ -11,8 +11,8 @@ void led_config(void) {
     gpio_output_options_set(LED_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, LED_PIN);
     gpio_bit_write(LED_PORT, LED_PIN, SET);
 
-    rcu_periph_clock_enable(LED_TIMER_RCU);
-    timer_deinit(LED_TIMER);
+    rcu_periph_clock_enable(LED_BLINK_TIMER_RCU);
+    timer_deinit(LED_BLINK_TIMER);
 
     timer_parameter_struct timer_initpara;
     timer_struct_para_init(&timer_initpara);
@@ -21,12 +21,12 @@ void led_config(void) {
     timer_initpara.counterdirection = TIMER_COUNTER_UP;
     timer_initpara.period = 9999;
     timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
-    timer_init(LED_TIMER, &timer_initpara);
+    timer_init(LED_BLINK_TIMER, &timer_initpara);
 
-    timer_auto_reload_shadow_enable(LED_TIMER);
-    timer_interrupt_enable(LED_TIMER, TIMER_INT_UP);
+    timer_auto_reload_shadow_enable(LED_BLINK_TIMER);
+    timer_interrupt_enable(LED_BLINK_TIMER, TIMER_INT_UP);
 
-    timer_enable(LED_TIMER);
+    timer_enable(LED_BLINK_TIMER);
 
-    nvic_irq_enable(LED_IRQ, 2);
+    nvic_irq_enable(LED_BLINK_IRQ, 2);
 }
diff --git a/src/main.c b/src/main.c
index fd4f284..85babea 100644
--- a/src/main.c
+++ b/src/main.c
@@ -5,44 +5,6 @@
     \version 2024-02-22, V2.1.0, firmware for GD32E23x
 */
 #include "main.h"
-#include <stdio.h>
-#include "gd32e23x.h"
-#include "systick.h"
-#include "gd32e23x_libopt.h"
-#include "rs485.h"
-#include "led.h"
-#include "i2c.h"
-#include "ldc1612.h"
-#include "board_config.h"
-
-#ifdef SOFTWARE_IIC
-#include "soft_i2c.h"
-#else
-#include "i2c.h"
-#endif
-
-void watchdog_init(void) {
-    /* Enable the LSI clock */
-    rcu_osci_on(RCU_IRC40K);
-    rcu_osci_stab_wait(RCU_IRC40K);
-
-    /* Configure FWDGT counter clock: 40KHz(IRC40K) / 64 = 0.625 KHz */
-    fwdgt_config(625, FWDGT_PSC_DIV64); // Set timeout to 1 seconds (625 / 0.625 KHz)
-
-    /* Enable FWDGT */
-    fwdgt_enable();
-}
-
-void reset_mcu(void) {
-    /* Enable the write access to the FWDGT_CTL register */
-    FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
-
-    /* Configure FWDGT to trigger a system reset */
-    fwdgt_config(50, FWDGT_PSC_DIV4);
-
-    /* Reload the counter to trigger the reset */
-    fwdgt_counter_reload();
-}
 
 /*!
     \brief      main function
diff --git a/src/rs485.c b/src/rs485.c
index c471eca..ce911d1 100644
--- a/src/rs485.c
+++ b/src/rs485.c
@@ -56,7 +56,7 @@ void process_command(uint8_t *cmd, size_t length) {
             } else if (strcmp(combined_str, "M3") == 0)
             {
                 printf("%c%c%c%c%c%c", 0xB5, 0xF1, 0x02, 0x6F, 0x6B, 0xCC);
-                reset_mcu();
+                fwdgt_reset_mcu();
             } else {
                 printf("%c%c%c%c%c%c%c", 0xB5, 0xF0, 0x03, 0x65, 0x72, 0x72, 0x3C);
                 return;
diff --git a/src/soft_i2c.c b/src/soft_i2c.c
index a985aef..69e0240 100644
--- a/src/soft_i2c.c
+++ b/src/soft_i2c.c
@@ -13,7 +13,7 @@
 void soft_i2c_delay(void) {
     delay_us(20); // Adjust delay as needed
     /* delay to freq
-     *  20KHz: delay_us(20);
+     *  15KHz: delay_us(20);
      *  65KHz: delay_us(1);
      */
 }
@@ -44,15 +44,12 @@ void soft_i2c_config(void) {
     \retval     none
 */
 void soft_i2c_start(void) {
-    // sda_out();
     I2C_SDA_HIGH();
     I2C_SCL_HIGH();
     soft_i2c_delay();
     I2C_SDA_LOW();
     soft_i2c_delay();
     I2C_SCL_LOW();
-    // soft_i2c_delay();
-    // 从全高开始，SCL为高期间，SDA下降沿表示start信号，再拉低SCL
 }
 
 /*!
@@ -69,7 +66,6 @@ void soft_i2c_stop(void) {
     I2C_SCL_HIGH();
     soft_i2c_delay();
     I2C_SDA_HIGH();
-    // 从全低开始，SCL为高期间，SDA上升沿表示stop
 }
 
 /*!
@@ -87,7 +83,6 @@ void soft_i2c_send_ack(void) {
     I2C_SCL_LOW();
     soft_i2c_delay();
     I2C_SDA_HIGH();
-    // SCL产生一个正常的时钟周期，其间SDA始终为低电平，表示ACK
 }
 
 /*!
@@ -97,7 +92,6 @@ void soft_i2c_send_ack(void) {
     \retval     none
 */
 void soft_i2c_send_nack(void) {
-    // sda_out();
     I2C_SDA_HIGH();
     soft_i2c_delay();
     I2C_SCL_HIGH();
@@ -105,7 +99,6 @@ void soft_i2c_send_nack(void) {
     I2C_SCL_LOW();
     soft_i2c_delay();
     I2C_SDA_HIGH();
-    // SCL产生一个正常的时钟周期，其间SDA始终为高电平，表示NACK
 }
 
 /*!
@@ -115,13 +108,11 @@ void soft_i2c_send_nack(void) {
     \retval     0: ACK received, 1: ACK not received
 */
 uint8_t soft_i2c_wait_ack(void) {
-    // sda_in();
     I2C_SDA_HIGH();
     soft_i2c_delay();
     I2C_SCL_HIGH();
     soft_i2c_delay();
     uint8_t ack = !I2C_SDA_READ();
-    //ACK信号是第九个时钟期间，SDA被从机在SCL高期间，拉低并保持低电平。此处判断SDA是否被拉低，被拉低则返回0，取反为1，表示收到ACK
     I2C_SCL_LOW();
     return ack;
 }
@@ -135,19 +126,18 @@ uint8_t soft_i2c_wait_ack(void) {
 void soft_i2c_send_byte(uint8_t byte) {
     // sda_out();
     for (int i = 0; i < 8; i++) {
-        if (byte & 0x80) { //通过&操作获取第一位是1还是0
-            I2C_SDA_HIGH(); //SCL低电平期间，SDA高电平表示1
+        if (byte & 0x80) {
+            I2C_SDA_HIGH();
         } else {
-            I2C_SDA_LOW(); //SCL低电平期间，SDA低电平表示0
+            I2C_SDA_LOW();
         }
-        byte <<= 1; //左移一位，把原本第二位的数据移到第一位，再判断高低电平
+        byte <<= 1;
         soft_i2c_delay();
-        I2C_SCL_HIGH(); //SCL拉高电平，SDA电平状态保持不变
+        I2C_SCL_HIGH();
+        soft_i2c_delay();
+        I2C_SCL_LOW();
         soft_i2c_delay();
-        I2C_SCL_LOW(); //SCL拉低电平
-        delay_us(5);
     }
-    // i2c_wait_ack();
 }
 
 /*!
@@ -157,9 +147,8 @@ void soft_i2c_send_byte(uint8_t byte) {
     \retval     received byte
 */
 uint8_t soft_i2c_receive_byte(uint8_t ack) {
-    // sda_in();
     uint8_t byte = 0;
-    I2C_SDA_HIGH(); //从高开始
+    I2C_SDA_HIGH();
     for (int i = 0; i < 8; i++) {
         byte <<= 1;
         I2C_SCL_HIGH();
diff --git a/src/tmp112.c b/src/tmp112.c
index d28ce94..27b97f9 100644
--- a/src/tmp112.c
+++ b/src/tmp112.c
@@ -11,9 +11,9 @@ uint32_t tmp112a_get_raw_channel_result(void) {
     // ldc1612_iic_read_16bits(CONVERTION_RESULT_REG_START + channel, value);
 
 #ifdef SOFTWARE_IIC
-    soft_i2c_read_16bits(TMP112A_ADDR, 0x00, value);
+    soft_i2c_read_16bits(TMP112A_ADDR, TMP112A_TEMP_REG, value);
 #else
-    i2c_read_16bits(TMP112A_ADDR, 0x00, value);
+    i2c_read_16bits(TMP112A_ADDR, TMP112A_TEMP_REG, value);
 #endif
 
     raw_value = ((uint16_t) (value[0] << 4) | (value[1]>>4));