写一段STC89C52驱动SHT30代码
时间: 2023-12-01 10:35:41 浏览: 48
当然,这是一个STC89C52驱动SHT30温湿度传感器的代码示例:
```c
#include <reg52.h>
#include <intrins.h>
#define SHT30_SCL P2_0
#define SHT30_SDA P2_1
sbit SHT30_SCL = P2^0;
sbit SHT30_SDA = P2^1;
void delay_us(unsigned int us) {
while (us--) {
_nop_();
_nop_();
_nop_();
_nop_();
}
}
void I2C_start() {
SHT30_SCL = 1;
SHT30_SDA = 1;
delay_us(4);
SHT30_SDA = 0;
delay_us(4);
SHT30_SCL = 0;
}
void I2C_stop() {
SHT30_SCL = 0;
SHT30_SDA = 0;
delay_us(4);
SHT30_SCL = 1;
delay_us(4);
SHT30_SDA = 1;
delay_us(4);
}
bit I2C_write_byte(unsigned char dat) {
unsigned char i;
bit ack;
for (i = 0; i < 8; i++) {
SHT30_SCL = 0;
delay_us(2);
SHT30_SDA = dat & 0x80;
dat <<= 1;
delay_us(2);
SHT30_SCL = 1;
delay_us(2);
}
SHT30_SCL = 0;
delay_us(2);
SHT30_SDA = 1;
delay_us(2);
SHT30_SCL = 1;
delay_us(2);
ack = !SHT30_SDA;
SHT30_SCL = 0;
delay_us(2);
return ack;
}
unsigned char I2C_read_byte() {
unsigned char i, dat = 0;
SHT30_SDA = 1;
for (i = 0; i < 8; i++) {
dat <<= 1;
SHT30_SCL = 0;
delay_us(2);
SHT30_SCL = 1;
delay_us(2);
if (SHT30_SDA) {
dat |= 0x01;
}
delay_us(2);
}
SHT30_SCL = 0;
delay_us(2);
return dat;
}
void SHT30_reset() {
I2C_start();
I2C_write_byte(0x80);
I2C_stop();
}
void SHT30_measure(float *temperature, float *humidity) {
unsigned char buf[6];
I2C_start();
I2C_write_byte(0x80);
if (!I2C_write_byte(0x2C)) { // Measure command
I2C_stop();
return;
}
delay_us(500);
I2C_start();
I2C_write_byte(0x81);
buf[0] = I2C_read_byte();
buf[1] = I2C_read_byte();
buf[2] = I2C_read_byte();
buf[3] = I2C_read_byte();
buf[4] = I2C_read_byte();
buf[5] = I2C_read_byte();
I2C_stop();
*temperature = ((buf[0] << 8) | buf[1]) * 175.0 / 65535.0 - 45.0;
*humidity = ((buf[3] << 8) | buf[4]) * 100.0 / 65535.0;
}
void main() {
float temperature, humidity;
SHT30_reset();
while (1) {
SHT30_measure(&temperature, &humidity);
// 在这里可以进行温湿度的处理和使用
// 延时一段时间后再次测量
delay_ms(1000);
}
}
```
这段代码使用STC89C52单片机通过I2C协议与SHT30温湿度传感器进行通信,并实现了复位和测量温湿度的功能。你可以根据需要在测量后进行温湿度数据的处理和使用。请确保你已经正确连接了STC89C52和SHT30,并将SCL和SDA引脚分别连接到STC89C52的P2.0和P2.1引脚上。