SHTC3 C语言代码
时间: 2023-07-09 16:52:44 浏览: 98
以下是一个使用SHTC3传感器的C语言示例代码:
```
#include <stdio.h>
#include <wiringPi.h>
#include <wiringPiI2C.h>
#define SHTC3_ADDR 0x70
float temperature = 0.0;
float humidity = 0.0;
int main() {
int fd = wiringPiI2CSetup(SHTC3_ADDR);
if (fd == -1) {
printf("Failed to init I2C\n");
return -1;
}
wiringPiI2CWriteReg16(fd, 0x35, 0x17);
delay(10);
uint8_t buf[6];
int count = wiringPiI2CRead(fd, buf, 6);
if (count != 6) {
printf("Failed to read data\n");
return -1;
}
uint16_t st = (buf[0] << 8) | buf[1];
uint16_t srh = (buf[3] << 8) | buf[4];
uint8_t crc = buf[5];
if (crc == ((st >> 8) + st + (srh >> 8) + srh)) {
temperature = ((175.0 * st) / 65535.0) - 45.0;
humidity = ((100.0 * srh) / 65535.0);
printf("Temperature: %.2f °C, Humidity: %.2f %%\n", temperature, humidity);
} else {
printf("CRC error!\n");
return -1;
}
return 0;
}
```
此示例使用wiringPi库与SHTC3通信,并从传感器读取温度和湿度数据。请注意,SHTC3的I2C地址为0x70,读取数据的命令为0x3517。返回的数据格式是16位温度和湿度值以及一个8位的循环冗余校验(CRC)。最后,通过计算和转换,将温度和湿度转换为浮点数,并通过printf函数输出。
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