前言

项目的配置可以参考我的最后一篇文章。两个不同地址的传感器可以挂在一条总线上，也可以像我一样挂在两条总线上。配置方法相同。这里有代码供参考。【STM32】I2C练习，HAL库读取MPU6050角度陀螺仪

sht3x.c

#include "sht3x.h"  static int16_t Sht3xAddr = 0x44 << 1; // 读写位0x88 SHT3XDATATYPE Sht3x_Data;  int8_t Sensor_I2C1_Read(uint16_t DevAddr, uint8_t *oData, uint16_t DataLen) { 
          return HAL_I2C_Master_Receive(&hi2c1,DevAddr,oData,DataLen,1000); }  int8_t Sensor_I2C1_Write(uint16_t DevAddr, uint8_t *iData, uint16_t DataLen) { 
          return HAL_I2C_Master_Transmit(&hi2c1,DevAddr,iData,DataLen,1000); }  void Sht3x_Read_Data(void) { 
          uint8_t Read_Buf[6];    Read_Buf[0] = 0x24;  Read_Buf[1] = 0x0b;  Sensor_I2C1_Write(Sht3xAddr, Read_Buf, 2);  Sensor_I2C1_Read(Sht3xAddr,Read_Buf, 6);    Sht3x_Data.Temperature = (uint16_t)((Read_Buf[0]<<8) | Read_Buf[1]);		//温度拼接
	Sht3x_Data.Humidity = (uint16_t)((Read_Buf[3]<<8) | Read_Buf[4]);			//湿度拼接

	Sht3x_Data.Temperature = (175.0f * (Sht3x_Data.Temperature / 65535.0f) - 45.0f);    // T = -45 + 175 * tem / (2^16-1)
	Sht3x_Data.Humidity = (100.0f * Sht3x_Data.Humidity / 65535.0f);           		    // RH = hum*100 / (2^16-1)
}

sht3x.h

#ifndef __SHT3X_H
#define __SHT3X_H

#include "main.h"

typedef struct{ 
        
	float Temperature;
	float Humidity;
}SHT3XDATATYPE;

extern SHT3XDATATYPE Sht3x_Data;
extern I2C_HandleTypeDef hi2c1;

int8_t Sensor_I2C1_Read(uint16_t DevAddr, uint8_t *oData, uint16_t DataLen);
int8_t Sensor_I2C1_Write(uint16_t DevAddr, uint8_t *iData, uint16_t DataLen);

void Sht3x_Read_Data(void);

#endif