hulk/gd32e230_uart_ring_buffer
1
0
Fork 0
generated from hulk/gd32e23x_template_cmake_vscode
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

IIC OK but sensor error

Browse Source
This commit is contained in:
yelvlab
2025-08-14 00:41:12 +08:00
parent 54bf206ec3
commit 4e0ad6e8eb
9 changed files with 1315 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
CMakeLists.txt
View File

@@ -30,6 +30,9 @@ set(TARGET_SRC
Src/uart_ring_buffer.c Src/uart_ring_buffer.c
Src/command.c Src/command.c
Src/i2c.c Src/i2c.c
Src/ldc1612.c
Src/tmp112.c
Src/sensor_example.c
) )
# 设置输出目录 # 设置输出目录

177
Inc/ldc1612.h Normal file
View File

@@ -0,0 +1,177 @@
//
// Created by dell on 24-12-3.
// LDC1612 Inductive Sensor Driver Header
//
#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"
/******************************************************************************/
/* LDC1612 I2C Address */
#define LDC1612_ADDR (0x2B) // 7-bit address
/* Register Addresses */
/******************************************************************************/
#define LDC1612_DATA_CH0_MSB 0x00
#define LDC1612_DATA_CH0_LSB 0x01
#define LDC1612_DATA_CH1_MSB 0x02
#define LDC1612_DATA_CH1_LSB 0x03
#define LDC1612_RCOUNT_CH0 0x08
#define LDC1612_RCOUNT_CH1 0x09
#define LDC1612_OFFSET_CH0 0x0C
#define LDC1612_OFFSET_CH1 0x0D
#define LDC1612_SETTLECOUNT_CH0 0x10
#define LDC1612_SETTLECOUNT_CH1 0x11
#define LDC1612_CLOCK_DIVIDERS_CH0 0x14
#define LDC1612_CLOCK_DIVIDERS_CH1 0x15
#define LDC1612_STATUS 0x18
#define LDC1612_ERROR_CONFIG 0x19
#define LDC1612_CONFIG 0x1A
#define LDC1612_MUX_CONFIG 0x1B
#define LDC1612_RESET_DEV 0x1C
#define LDC1612_DRIVE_CURRENT_CH0 0x1E
#define LDC1612_DRIVE_CURRENT_CH1 0x1F
#define LDC1612_MANUFACTURER_ID 0x7E
#define LDC1612_DEVICE_ID 0x7F
/* Channel Definitions */
/******************************************************************************/
#define LDC1612_CHANNEL_0 0
#define LDC1612_CHANNEL_1 1
/* Configuration Values */
/******************************************************************************/
#define LDC1612_CONVERSION_TIME_CH0 0x0546 // 转换时间
#define LDC1612_DRIVE_CURRENT_DEFAULT 0x9000 // 驱动电流
#define LDC1612_MUX_CONFIG_DEFAULT 0x020C // 无自动扫描，滤波器带宽3.3MHz
#define LDC1612_SENSOR_CONFIG_ACTIVE 0x1601 // 激活配置
#define LDC1612_SENSOR_CONFIG_SLEEP 0x2801 // 休眠配置
#define LDC1612_ERROR_CONFIG_DEFAULT 0x0000 // 错误配置
#define LDC1612_SETTLECOUNT_CH0_DEFAULT 0x001E // 稳定时间
#define LDC1612_RESET_VALUE 0x8000 // 复位值
/* Coil Parameters */
/******************************************************************************/
#define LDC1612_COIL_RP_KOHM 7.2f // 并联电阻 (kΩ)
#define LDC1612_COIL_L_UH 33.0f // 电感值 (μH)
#define LDC1612_COIL_C_PF 150.0f // 电容值 (pF)
#define LDC1612_COIL_Q_FACTOR 35.97f // 品质因数
#define LDC1612_COIL_FREQ_HZ 2262000 // 谐振频率 (Hz)
/* Error Codes */
/******************************************************************************/
#define LDC1612_ERROR_NONE 0x00000000
#define LDC1612_ERROR_NO_COIL 0xF0000000
#define LDC1612_ERROR_UNDER_RANGE 0x80000000
#define LDC1612_ERROR_OVER_RANGE 0x40000000
#define LDC1612_ERROR_WATCHDOG 0x20000000
#define LDC1612_ERROR_AMPLITUDE 0x10000000
/* Status Definitions */
/******************************************************************************/
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;
typedef struct {
uint32_t raw_data;
uint32_t frequency;
float distance_mm;
bool error_flag;
uint8_t error_code;
} ldc1612_result_t;
/******************************************************************************/
/* Function Declarations */
/*!
\brief 初始化LDC1612传感器
\param[in] none
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_init(void);
/*!
\brief 复位LDC1612传感器
\param[in] none
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_reset(void);
/*!
\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);
/*!
\brief 读取制造商ID
\param[in] none
\param[out] none
\retval uint16_t 制造商ID
*/
uint16_t ldc1612_get_manufacturer_id(void);
/*!
\brief 读取设备ID
\param[in] none
\param[out] none
\retval uint16_t 设备ID
*/
uint16_t ldc1612_get_device_id(void);
/*!
\brief 读取通道原始数据
\param[in] channel: 通道号
\param[out] result: 结果结构体指针
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_read_channel(uint8_t channel, ldc1612_result_t *result);
/*!
\brief 设置驱动电流
\param[in] channel: 通道号
\param[in] current: 电流值
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_set_drive_current(uint8_t channel, uint16_t current);
/*!
\brief 自动检测驱动电流
\param[in] channel: 通道号
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_auto_detect_drive_current(uint8_t channel);
/*!
\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* ldc1612_get_status_string(ldc1612_status_t status);
#endif //LDC1612_H

28
Inc/sensor_example.h Normal file
View File

@@ -0,0 +1,28 @@
//
// Sensor Usage Example Header
// 传感器使用示例头文件
//
#ifndef SENSOR_EXAMPLE_H
#define SENSOR_EXAMPLE_H
#include "gd32e23x.h"
#include "board_config.h"
/*!
\brief 传感器初始化示例
\param[in] none
\param[out] none
\retval none
*/
void sensors_init_example(void);
/*!
\brief 传感器读取示例
\param[in] none
\param[out] none
\retval none
*/
void sensors_read_example(void);
#endif // SENSOR_EXAMPLE_H

155
Inc/tmp112.h Normal file
View File

@@ -0,0 +1,155 @@
//
// 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 (0x48) // 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_4HZ)
/* 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);
/*!
\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

367
Src/ldc1612.c Normal file
View File

@@ -0,0 +1,367 @@
//
// Created by dell on 24-12-3.
// LDC1612 Inductive Sensor Driver Implementation
//
#include "ldc1612.h"
/* Private function prototypes */
static i2c_status_t ldc1612_write_register(uint8_t reg_addr, uint16_t value);
static i2c_status_t ldc1612_read_register(uint8_t reg_addr, uint16_t *value);
static uint16_t ldc1612_calculate_clock_dividers(uint8_t channel);
static uint32_t ldc1612_parse_raw_result(uint32_t raw_result);
/*!
\brief 初始化LDC1612传感器
\param[in] none
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_init(void) {
i2c_status_t i2c_status;
uint16_t device_id, manufacturer_id;
/* 复位传感器 */
i2c_status = ldc1612_reset();
if (i2c_status != I2C_STATUS_SUCCESS) {
return LDC1612_STATUS_ERROR;
}
/* 等待复位完成 */
delay_ms(10);
/* 验证设备ID */
device_id = ldc1612_get_device_id();
manufacturer_id = ldc1612_get_manufacturer_id();
if (device_id != 0x3055 || manufacturer_id != 0x5449) {
return LDC1612_STATUS_ERROR;
}
return LDC1612_STATUS_SUCCESS;
}
/*!
\brief 复位LDC1612传感器
\param[in] none
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_reset(void) {
i2c_status_t status = ldc1612_write_register(LDC1612_RESET_DEV, LDC1612_RESET_VALUE);
return (status == I2C_STATUS_SUCCESS) ? LDC1612_STATUS_SUCCESS : LDC1612_STATUS_ERROR;
}
/*!
\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_status_t status;
uint16_t clock_dividers;
if (channel > 1) {
return LDC1612_STATUS_INVALID_PARAM;
}
/* 进入休眠模式进行配置 */
status = ldc1612_write_register(LDC1612_CONFIG, LDC1612_SENSOR_CONFIG_SLEEP);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 计算并设置时钟分频 */
clock_dividers = ldc1612_calculate_clock_dividers(channel);
status = ldc1612_write_register(LDC1612_CLOCK_DIVIDERS_CH0 + channel, clock_dividers);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 设置稳定时间 */
status = ldc1612_write_register(LDC1612_SETTLECOUNT_CH0 + channel, LDC1612_SETTLECOUNT_CH0_DEFAULT);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 设置转换时间 */
status = ldc1612_write_register(LDC1612_RCOUNT_CH0 + channel, LDC1612_CONVERSION_TIME_CH0);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 设置错误配置 */
status = ldc1612_write_register(LDC1612_ERROR_CONFIG, LDC1612_ERROR_CONFIG_DEFAULT);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 设置驱动电流 */
status = ldc1612_write_register(LDC1612_DRIVE_CURRENT_CH0 + channel, LDC1612_DRIVE_CURRENT_DEFAULT);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 设置MUX配置 */
status = ldc1612_write_register(LDC1612_MUX_CONFIG, LDC1612_MUX_CONFIG_DEFAULT);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 退出休眠模式，开始转换 */
status = ldc1612_write_register(LDC1612_CONFIG, LDC1612_SENSOR_CONFIG_ACTIVE);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
return LDC1612_STATUS_SUCCESS;
}
/*!
\brief 读取制造商ID
\param[in] none
\param[out] none
\retval uint16_t 制造商ID
*/
uint16_t ldc1612_get_manufacturer_id(void) {
uint16_t id = 0;
ldc1612_read_register(LDC1612_MANUFACTURER_ID, &id);
return id;
}
/*!
\brief 读取设备ID
\param[in] none
\param[out] none
\retval uint16_t 设备ID
*/
uint16_t ldc1612_get_device_id(void) {
uint16_t id = 0;
ldc1612_read_register(LDC1612_DEVICE_ID, &id);
return id;
}
/*!
\brief 读取通道原始数据
\param[in] channel: 通道号
\param[out] result: 结果结构体指针
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_read_channel(uint8_t channel, ldc1612_result_t *result) {
uint16_t msb, lsb;
uint32_t raw_data;
i2c_status_t status;
if (channel > 1 || result == NULL) {
return LDC1612_STATUS_INVALID_PARAM;
}
/* 读取MSB */
status = ldc1612_read_register(LDC1612_DATA_CH0_MSB + (channel * 2), &msb);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 读取LSB */
status = ldc1612_read_register(LDC1612_DATA_CH0_LSB + (channel * 2), &lsb);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 组合32位数据 */
raw_data = ((uint32_t)msb << 16) | lsb;
/* 解析结果 */
result->raw_data = raw_data;
result->frequency = ldc1612_parse_raw_result(raw_data);
/* 检查错误 */
if (result->frequency >= 0x10000000) {
result->error_flag = true;
result->error_code = (result->frequency >> 24) & 0xFF;
return LDC1612_STATUS_ERROR;
} else {
result->error_flag = false;
result->error_code = 0;
}
return LDC1612_STATUS_SUCCESS;
}
/*!
\brief 设置驱动电流
\param[in] channel: 通道号
\param[in] current: 电流值
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_set_drive_current(uint8_t channel, uint16_t current) {
if (channel > 1) {
return LDC1612_STATUS_INVALID_PARAM;
}
i2c_status_t status = ldc1612_write_register(LDC1612_DRIVE_CURRENT_CH0 + channel, current);
return (status == I2C_STATUS_SUCCESS) ? LDC1612_STATUS_SUCCESS : LDC1612_STATUS_ERROR;
}
/*!
\brief 自动检测驱动电流
\param[in] channel: 通道号
\param[out] none
\retval ldc1612_status_t
*/
ldc1612_status_t ldc1612_auto_detect_drive_current(uint8_t channel) {
uint16_t config_value, drive_current_reg;
uint16_t init_value, drive_current;
i2c_status_t status;
if (channel > 1) {
return LDC1612_STATUS_INVALID_PARAM;
}
/* 进入休眠模式 */
status = ldc1612_write_register(LDC1612_CONFIG, LDC1612_SENSOR_CONFIG_SLEEP);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 设置时钟分频 */
uint16_t clock_dividers = ldc1612_calculate_clock_dividers(channel);
status = ldc1612_write_register(LDC1612_CLOCK_DIVIDERS_CH0 + channel, clock_dividers);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 读取当前配置并禁用Rp覆盖 */
status = ldc1612_read_register(LDC1612_CONFIG, &config_value);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
config_value &= ~(1 << 12); // 禁用RP_OVERRIDE_EN
status = ldc1612_write_register(LDC1612_CONFIG, config_value);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 启动测量 */
status = ldc1612_write_register(LDC1612_CONFIG, LDC1612_SENSOR_CONFIG_ACTIVE);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
/* 等待至少一次转换完成 */
delay_ms(10);
/* 读取初始驱动电流值 */
status = ldc1612_read_register(LDC1612_DRIVE_CURRENT_CH0 + channel, &drive_current_reg);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
init_value = (drive_current_reg >> 6) & 0x1F;
drive_current = (init_value << 11) | 0x0000;
/* 写入检测到的驱动电流 */
status = ldc1612_write_register(LDC1612_DRIVE_CURRENT_CH0 + channel, drive_current);
if (status != I2C_STATUS_SUCCESS) return LDC1612_STATUS_ERROR;
return LDC1612_STATUS_SUCCESS;
}
/*!
\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* ldc1612_get_status_string(ldc1612_status_t status) {
switch (status) {
case LDC1612_STATUS_SUCCESS:
return "SUCCESS";
case LDC1612_STATUS_ERROR:
return "ERROR";
case LDC1612_STATUS_TIMEOUT:
return "TIMEOUT";
case LDC1612_STATUS_INVALID_PARAM:
return "INVALID_PARAM";
case LDC1612_STATUS_NO_COIL:
return "NO_COIL";
case LDC1612_STATUS_UNDER_RANGE:
return "UNDER_RANGE";
case LDC1612_STATUS_OVER_RANGE:
return "OVER_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_status_t
*/
static i2c_status_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 i2c_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_status_t ldc1612_read_register(uint8_t reg_addr, uint16_t *value) {
uint8_t data[2];
i2c_status_t status;
if (value == NULL) {
return I2C_STATUS_INVALID_PARAM;
}
status = i2c_read_16bits(LDC1612_ADDR, reg_addr, data);
if (status == I2C_STATUS_SUCCESS) {
*value = ((uint16_t)data[0] << 8) | data[1];
}
return status;
}
/*!
\brief 计算时钟分频值
\param[in] channel: 通道号
\param[out] none
\retval uint16_t 分频值
*/
static uint16_t ldc1612_calculate_clock_dividers(uint8_t channel) {
uint16_t fin_div, fref_div;
float sensor_freq;
/* 计算传感器频率 (MHz) */
sensor_freq = 1.0f / (2.0f * 3.14159f * sqrtf(LDC1612_COIL_L_UH * LDC1612_COIL_C_PF * 1e-18f)) * 1e-6f;
/* 计算FIN分频 */
fin_div = (uint16_t)(sensor_freq / 8.75f + 1);
/* 计算FREF分频 */
if (fin_div * 4 < 40) {
fref_div = 2;
} else {
fref_div = 4;
}
return (fin_div << 12) | fref_div;
}
/*!
\brief 解析原始结果
\param[in] raw_result: 原始数据
\param[out] none
\retval uint32_t 解析后的数据
*/
static uint32_t ldc1612_parse_raw_result(uint32_t raw_result) {
uint32_t calibration_value;
uint8_t error_code;
calibration_value = raw_result & 0x0FFFFFFF;
/* 检查无线圈错误 */
if (calibration_value == 0x0FFFFFFF) {
return LDC1612_ERROR_NO_COIL;
}
error_code = (raw_result >> 24) & 0xFF;
/* 检查各种错误 */
if (error_code & 0x80) {
return LDC1612_ERROR_UNDER_RANGE;
}
if (error_code & 0x40) {
return LDC1612_ERROR_OVER_RANGE;
}
if (error_code & 0x20) {
return LDC1612_ERROR_WATCHDOG;
}
if (error_code & 0x10) {
return LDC1612_ERROR_AMPLITUDE;
}
return calibration_value;
}

5
Src/main.c
View File

@@ -40,6 +40,7 @@ OF SUCH DAMAGE.
#include <stdio.h> #include <stdio.h>
#include "i2c.h" #include "i2c.h"
#include "board_config.h" #include "board_config.h"
#include "sensor_example.h"
bool g_status_switch = false; bool g_status_switch = false;
@@ -79,6 +80,10 @@ int main(void)
#ifdef DEBUG_VERBOSE #ifdef DEBUG_VERBOSE
i2c_scan(); i2c_scan();
#endif #endif
sensors_init_example();
sensors_read_example();
while(1){ while(1){

224
Src/sensor_example.c Normal file
View File

@@ -0,0 +1,224 @@
//
// Sensor Usage Example
// 传感器使用示例代码
//
#include "ldc1612.h"
// #include "tmp112.h"
#include "i2c.h"
/*!
\brief 传感器初始化示例
\param[in] none
\param[out] none
\retval none
*/
void sensors_init_example(void) {
ldc1612_status_t ldc_status;
// tmp112a_status_t tmp_status;
/* 初始化I2C总线 */
i2c_status_t i2c_status = i2c_config();
if (i2c_status != I2C_STATUS_SUCCESS) {
// 使用串口发送错误信息
const char* error_msg = "I2C init failed\r\n";
for (uint8_t i = 0; error_msg[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, error_msg[i]);
}
while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
return;
}
/* 扫描I2C总线 */
// i2c_scan();
/* 初始化LDC1612 */
ldc_status = ldc1612_init();
if (ldc_status == LDC1612_STATUS_SUCCESS) {
const char* msg = "LDC1612 init success\r\n";
for (uint8_t i = 0; msg[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, msg[i]);
}
while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
/* 配置通道0 */
ldc_status = ldc1612_config_single_channel(LDC1612_CHANNEL_0);
if (ldc_status != LDC1612_STATUS_SUCCESS) {
const char* error = "LDC1612 config failed\r\n";
for (uint8_t i = 0; error[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, error[i]);
}
while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
}
} else {
const char* error = "LDC1612 init failed: ";
for (uint8_t i = 0; error[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, error[i]);
}
const char* status_str = ldc1612_get_status_string(ldc_status);
for (uint8_t i = 0; status_str[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, status_str[i]);
}
const char* newline = "\r\n";
for (uint8_t i = 0; newline[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, newline[i]);
}
while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
}
/* 初始化TMP112A */
// tmp_status = tmp112a_init();
// if (tmp_status == TMP112A_STATUS_SUCCESS) {
// const char* msg = "TMP112A init success\r\n";
// for (uint8_t i = 0; msg[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, msg[i]);
// }
// while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
// /* 设置温度阈值 */
// tmp_status = tmp112a_set_thresholds(-10.0f, 50.0f);
// if (tmp_status != TMP112A_STATUS_SUCCESS) {
// const char* error = "TMP112A threshold config failed\r\n";
// for (uint8_t i = 0; error[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, error[i]);
// }
// while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
// }
// } else {
// const char* error = "TMP112A init failed: ";
// for (uint8_t i = 0; error[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, error[i]);
// }
// const char* status_str = tmp112a_get_status_string(tmp_status);
// for (uint8_t i = 0; status_str[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, status_str[i]);
// }
// const char* newline = "\r\n";
// for (uint8_t i = 0; newline[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, newline[i]);
// }
// while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
// }
}
/*!
\brief 传感器读取示例
\param[in] none
\param[out] none
\retval none
*/
void sensors_read_example(void) {
ldc1612_result_t ldc_result;
// tmp112a_result_t tmp_result;
ldc1612_status_t ldc_status;
// tmp112a_status_t tmp_status;
/* 读取LDC1612数据 */
ldc_status = ldc1612_read_channel(LDC1612_CHANNEL_0, &ldc_result);
if (ldc_status == LDC1612_STATUS_SUCCESS) {
if (!ldc_result.error_flag) {
const char* msg = "LDC1612 Data: 0x";
for (uint8_t i = 0; msg[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, msg[i]);
}
/* 发送32位十六进制数据 */
uint8_t hex_chars[] = "0123456789ABCDEF";
for (int8_t i = 7; i >= 0; i--) {
uint8_t nibble = (ldc_result.frequency >> (i * 4)) & 0x0F;
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, hex_chars[nibble]);
}
const char* newline = "\r\n";
for (uint8_t i = 0; newline[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, newline[i]);
}
while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
} else {
const char* error = "LDC1612 Error Code: 0x";
for (uint8_t i = 0; error[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, error[i]);
}
uint8_t hex_chars[] = "0123456789ABCDEF";
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, hex_chars[(ldc_result.error_code >> 4) & 0x0F]);
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, hex_chars[ldc_result.error_code & 0x0F]);
const char* newline = "\r\n";
for (uint8_t i = 0; newline[i] != '\0'; i++) {
while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(RS485_PHY, newline[i]);
}
while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
}
}
/* 读取TMP112A数据 */
// tmp_status = tmp112a_read_temperature(&tmp_result);
// if (tmp_status == TMP112A_STATUS_SUCCESS) {
// const char* msg = "Temperature: ";
// for (uint8_t i = 0; msg[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, msg[i]);
// }
// /* 简单的温度显示（整数部分） */
// int16_t temp_int = (int16_t)tmp_result.temperature_c;
// if (temp_int < 0) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, '-');
// temp_int = -temp_int;
// }
// if (temp_int >= 100) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, '0' + (temp_int / 100));
// temp_int %= 100;
// }
// if (temp_int >= 10) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, '0' + (temp_int / 10));
// temp_int %= 10;
// }
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, '0' + temp_int);
// const char* unit = " C";
// for (uint8_t i = 0; unit[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, unit[i]);
// }
// if (tmp_result.alert_flag) {
// const char* alert = " [ALERT]";
// for (uint8_t i = 0; alert[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, alert[i]);
// }
// }
// const char* newline = "\r\n";
// for (uint8_t i = 0; newline[i] != '\0'; i++) {
// while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(RS485_PHY, newline[i]);
// }
// while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
// }
}

49
Src/soft_i2c.c
View File

@@ -59,13 +59,13 @@ void soft_i2c_start(void) {
\retval none \retval none
*/ */
void soft_i2c_stop(void) { void soft_i2c_stop(void) {
// sda_out(); I2C_SCL_LOW(); // 确保时钟为低
I2C_SCL_LOW(); I2C_SDA_LOW(); // 拉低数据线
I2C_SDA_LOW();
soft_i2c_delay(); soft_i2c_delay();
I2C_SCL_HIGH(); I2C_SCL_HIGH(); // 拉高时钟
soft_i2c_delay(); soft_i2c_delay();
I2C_SDA_HIGH(); 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
} }
/*! /*!
@@ -108,12 +108,13 @@ void soft_i2c_send_nack(void) {
\retval 0: ACK received, 1: ACK not received \retval 0: ACK received, 1: ACK not received
*/ */
uint8_t soft_i2c_wait_ack(void) { uint8_t soft_i2c_wait_ack(void) {
I2C_SDA_HIGH(); I2C_SDA_HIGH(); // 释放SDA线，让从设备控制
soft_i2c_delay(); soft_i2c_delay();
I2C_SCL_HIGH(); I2C_SCL_HIGH(); // 拉高时钟
soft_i2c_delay(); soft_i2c_delay();
uint8_t ack = !I2C_SDA_READ(); uint8_t ack = !I2C_SDA_READ(); // 读取ACK信号（低电平为ACK）
I2C_SCL_LOW(); I2C_SCL_LOW(); // 拉低时钟
soft_i2c_delay(); // 添加缺失的延时
return ack; return ack;
} }
@@ -168,8 +169,13 @@ 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_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_start();
soft_i2c_send_byte(slave_addr); soft_i2c_send_byte(slave_addr << 1); // 修复：左移1位，添加写位
if (!soft_i2c_wait_ack()) { if (!soft_i2c_wait_ack()) {
soft_i2c_stop(); soft_i2c_stop();
return SOFT_I2C_FAIL; return SOFT_I2C_FAIL;
@@ -185,15 +191,24 @@ uint8_t soft_i2c_write_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t data
return SOFT_I2C_FAIL; return SOFT_I2C_FAIL;
} }
soft_i2c_send_byte(data[1]); soft_i2c_send_byte(data[1]);
if (soft_i2c_wait_ack()){} if (!soft_i2c_wait_ack()) { // 修复：添加错误处理
soft_i2c_stop();
return SOFT_I2C_FAIL;
}
soft_i2c_stop(); soft_i2c_stop();
return SOFT_I2C_OK; return SOFT_I2C_OK;
} }
uint8_t soft_i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data) 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_start();
soft_i2c_send_byte(slave_addr); soft_i2c_send_byte(slave_addr << 1); // 修复：左移1位，写操作
if (!soft_i2c_wait_ack()) { if (!soft_i2c_wait_ack()) {
soft_i2c_stop(); soft_i2c_stop();
return SOFT_I2C_FAIL; return SOFT_I2C_FAIL;
@@ -203,15 +218,17 @@ uint8_t soft_i2c_read_16bits(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data
soft_i2c_stop(); soft_i2c_stop();
return SOFT_I2C_FAIL; return SOFT_I2C_FAIL;
} }
soft_i2c_start();
soft_i2c_send_byte(slave_addr | 0x01); /* 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()) { if (!soft_i2c_wait_ack()) {
soft_i2c_stop(); soft_i2c_stop();
return SOFT_I2C_FAIL; return SOFT_I2C_FAIL;
} }
soft_i2c_delay(); soft_i2c_delay();
data[0] = soft_i2c_receive_byte(1); data[0] = soft_i2c_receive_byte(1); // 第一个字节发送ACK
data[1] = soft_i2c_receive_byte(0); data[1] = soft_i2c_receive_byte(0); // 最后一个字节发送NACK
soft_i2c_stop(); soft_i2c_stop();
return SOFT_I2C_OK; return SOFT_I2C_OK;
} }

323
Src/tmp112.c Normal file
View File

@@ -0,0 +1,323 @@
//
// Created by dell on 24-12-20.
// TMP112A Temperature Sensor Driver Implementation
//
#include "tmp112.h"
/* Private function prototypes */
static i2c_status_t tmp112a_write_register(uint8_t reg_addr, uint16_t value);
static i2c_status_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_status_t i2c_status;
/* 配置传感器为默认设置 */
i2c_status = tmp112a_config(TMP112A_CONFIG_DEFAULT);
if (i2c_status != I2C_STATUS_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_status_t status = tmp112a_write_register(TMP112A_CONFIG_REG, config);
return (status == I2C_STATUS_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_status_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_STATUS_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_STATUS_SUCCESS) {
result->alert_flag = (config_reg & TMP112A_CONFIG_AL) ? true : false;
} else {
result->alert_flag = false;
}
return TMP112A_STATUS_SUCCESS;
}
/*!
\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_status_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_STATUS_SUCCESS) {
return TMP112A_STATUS_ERROR;
}
/* 写入高温阈值 */
status = tmp112a_write_register(TMP112A_THIGH_REG, high_raw);
if (status != I2C_STATUS_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_status_t status;
/* 读取当前配置 */
status = tmp112a_read_register(TMP112A_CONFIG_REG, &config_reg);
if (status != I2C_STATUS_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_STATUS_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_status_t status;
/* 读取当前配置 */
status = tmp112a_read_register(TMP112A_CONFIG_REG, &config_reg);
if (status != I2C_STATUS_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_STATUS_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_status_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_STATUS_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_STATUS_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_STATUS_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_status_t
*/
static i2c_status_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_status_t
*/
static i2c_status_t tmp112a_read_register(uint8_t reg_addr, uint16_t *value) {
uint8_t data[2];
i2c_status_t status;
if (value == NULL) {
return I2C_STATUS_INVALID_PARAM;
}
status = i2c_read_16bits(TMP112A_ADDR, reg_addr, data);
if (status == I2C_STATUS_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);
}