sht40驱动代码
时间: 2023-08-05 19:04:52 浏览: 160
下面是一份基于STM32 HAL库的SHT40温湿度传感器的驱动代码,仅供参考:
```c
#include "sht40.h"
#define SHT40_ADDRESS 0x44
I2C_HandleTypeDef hi2c1;
void SHT40_Init(I2C_HandleTypeDef *hi2c)
{
hi2c1 = *hi2c;
}
float SHT40_GetTemperature(void)
{
uint8_t txBuffer[2];
uint8_t rxBuffer[6];
txBuffer[0] = 0x24;
txBuffer[1] = 0x00;
HAL_I2C_Master_Transmit(&hi2c1, SHT40_ADDRESS << 1, txBuffer, 2, 1000);
HAL_Delay(10);
HAL_I2C_Master_Receive(&hi2c1, SHT40_ADDRESS << 1, rxBuffer, 6, 1000);
uint16_t rawTemp = (rxBuffer[0] << 8) | rxBuffer[1];
float temp = -45 + 175 * ((float)rawTemp / (float)0xFFFF);
return temp;
}
float SHT40_GetHumidity(void)
{
uint8_t txBuffer[2];
uint8_t rxBuffer[6];
txBuffer[0] = 0x24;
txBuffer[1] = 0x00;
HAL_I2C_Master_Transmit(&hi2c1, SHT40_ADDRESS << 1, txBuffer, 2, 1000);
HAL_Delay(10);
HAL_I2C_Master_Receive(&hi2c1, SHT40_ADDRESS << 1, rxBuffer, 6, 1000);
uint16_t rawHumidity = (rxBuffer[3] << 8) | rxBuffer[4];
float humidity = 100 * ((float)rawHumidity / (float)0xFFFF);
return humidity;
}
```
以上代码中,SHT40_Init函数用于初始化I2C接口,SHT40_GetTemperature函数用于获取温度值,SHT40_GetHumidity函数用于获取湿度值。注意在使用之前需要先调用SHT40_Init函数初始化I2C接口。