STM32 例程-6 STM32CubeMx 读取SHT20 温湿度

技术杂谈74

1、使用STMF32F407ZGTx MCU
RCC
STM32 例程-6 STM32CubeMx 读取SHT20 温湿度
SYS
STM32 例程-6 STM32CubeMx 读取SHT20 温湿度
2、生成项目，并打开
3、在主代码里添加如下代码

#define SHT20_WriteAddr 0x80
#define SHT20_ReadAddr  0x81

#define SHT20_Trig_T 0xE3
#define SHT20_Trig_RH 0xE5

float TemValue,RhValue;

void SHT20_ReadValues(void)
{
 uint8_t tem[3],rh[3];
 uint16_t Tdata=0,RHdata=0;

 //第一种方法：分步操作
// uint8_t cmd;
//
// cmd=SHT20_Trig_T;
// HAL_I2C_Master_Transmit(&hi2c1,SHT20_WriteAddr,&cmd,1,0xffff);
// HAL_Delay(100);
// HAL_I2C_Master_Receive(&hi2c1,SHT20_ReadAddr,tem,3,0x3ffff);
//
// cmd=SHT20_Trig_RH;
// HAL_I2C_Master_Transmit(&hi2c1,SHT20_WriteAddr,&cmd,1,0xffff);
// HAL_Delay(100);
// HAL_I2C_Master_Receive(&hi2c1,SHT20_ReadAddr,rh,3,0x3ffff);

 //第二种方法：复合操作
 HAL_I2C_Mem_Read(&hi2c2,SHT20_ReadAddr,SHT20_Trig_T,I2C_MEMADD_SIZE_8BIT,tem,3,0xffff);
 HAL_I2C_Mem_Read(&hi2c2,SHT20_ReadAddr,SHT20_Trig_RH,I2C_MEMADD_SIZE_8BIT,rh,3,0xffff);

 Tdata = tem[0];
 Tdata <<= 65536 8; tdata +="tem[1]" & 0xfe; rhdata="rh[0];" <<="8;" temvalue="Tdata" * 175.72f - 46.85f; rhvalue="RHdata" 125.0f 6.0f; } void sht20_softreset(void) { uint8_t cmd="0xfe;" hal_i2c_master_transmit(&hi2c2,sht20_writeaddr,&cmd,1,0xffff); hal_delay(100); < code></=>

 while (1)
  {
    /* USER CODE END WHILE */
        SHT20_SoftReset();
        SHT20_ReadValues();
    /* USER CODE BEGIN 3 */
  }

4、下载代码执行
STM32 例程-6 STM32CubeMx 读取SHT20 温湿度

*[En]*

**

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Original: https://www.cnblogs.com/zhaogaojian/p/16089177.html
Author: zhaogaojian
Title: STM32 例程-6 STM32CubeMx 读取SHT20 温湿度