要求
设置温度湿度阈值，当温度过高时，打开风扇，蜂鸣器报警
当湿度比较高时，打开LED1灯，蜂鸣器报警
现象视频
IIC.mp4
代码实现
main.c
#include"si7006.h"
#include"led.h"
#include"fan.h"
#include"buzzer.h"//风扇 PE9
//蜂鸣器 PB6
int main()
{//i2c初始化i2c_init();//si7006初始化si7006_init();//风扇初始化fan_init();//蜂鸣器初始化buzzer_init();all_led_init();short tem;unsigned int short hum;while(1){//读取温度数据tem=si7006_read_tem();//读取湿度数据hum=si7006_read_hum();//计算温湿度数据hum=125*hum/65536-6;tem=175.72*tem/65536-46.85;if(hum>=50){LED1_ON();}else{LED1_OFF();}if(tem>=20){fan_on();buzzer_on();}else{fan_off();buzzer_off();}delay(1000);printf("hum:%d\n",hum);printf("tem:%d\n",tem);//串口打印delay(1000);}return 0;
}fan.c
#include "fan.h"//风扇 PE9
void fan_init()
{//GPIOE时钟使能RCC->MP_AHB4ENSETR |= (0x1<<4);//PE9设置为输出GPIOE->MODER &= (~(0X3<<18));GPIOE->MODER |= (0X1<<18);//PE9设置为推挽输出GPIOE->OTYPER &= (~(0X1<<9));//PE9设置为低速输出GPIOE->OSPEEDR &= (~(0X3<<9));//PE9无上拉下拉电阻GPIOE->PUPDR &= (~(0X3<<18));//默认输出低电平GPIOE->ODR &= (~(0X1<<9));
}void fan_on()
{GPIOE->ODR |= (0X1<<9);
}void fan_off()
{GPIOE->ODR &= (~(0X1<<9));
}
buzzer.c
#include "buzzer.h"//蜂鸣器 PB6
void buzzer_init()
{//GPIOB时钟使能RCC->MP_AHB4ENSETR |= (0x1<<1);//PB6设置为输出GPIOB->MODER &= (~(0X3<<12));GPIOB->MODER |= (0X1<<12);//PB6设置为推挽输出GPIOB->OTYPER &= (~(0X1<<6));//PB6设置为低速输出GPIOB->OSPEEDR &= (~(0X3<<12));//PB6无上拉下拉电阻GPIOB->PUPDR &= (~(0X3<<12));//默认输出低电平GPIOB->ODR &= (~(0X1<<6));
}void buzzer_on()
{GPIOB->ODR |= (0X1<<6);
}void buzzer_off()
{GPIOB->ODR &= (~(0X1<<6));
}
si7006.c
#include"si7006.h"
//封装延时函数
void delay(int ms)
{int i,j;for(i=0;i<ms;i++){for(j=0;j<2000;j++){}}
}
void si7006_init()
{//发起起始信号i2c_start();//发送从机地址+写标志i2c_write_byte(0X40<<1|0);//等待从机应答i2c_wait_ack();//发送寄存器地址 0XE6i2c_write_byte(0XE6);//等待从机应答i2c_wait_ack();//传输要写入的数据0X3A、i2c_write_byte(0X3A);//等待从机应答i2c_wait_ack();//发送终止信号i2c_stop();
}short si7006_read_tem()
{short tem;char tem_h,tem_l;//发起起始信号i2c_start();//发送从机地址+写标志i2c_write_byte(0x40<<1|0);//等待从机应答i2c_wait_ack();//发送寄存器地址 0XE3i2c_write_byte(0xe3);//等待从机应答i2c_wait_ack();//重复起始信号i2c_start();//发送从机地址+读标志i2c_write_byte(0x40<<1|1);//等待从机应答i2c_wait_ack();delay(100);//等待从机测量数据//接收数据高八位//发送应答信号tem_h=i2c_read_byte(0);//接收数据低八位//发送非应答信号tem_l=i2c_read_byte(1);//将高八位和低八位合成一个数据 高八位<<8|低8位tem=tem_h<<8|tem_l;return tem;
}unsigned short si7006_read_hum()
{unsigned short hum;unsigned char hum_h,hum_l;//发起起始信号i2c_start();//发送从机地址+写标志i2c_write_byte(0x40<<1|0);//等待从机应答i2c_wait_ack();//发送寄存器地址 0XE3i2c_write_byte(0xe5);//等待从机应答i2c_wait_ack();//重复起始信号i2c_start();//发送从机地址+读标志i2c_write_byte(0x40<<1|1);//等待从机应答i2c_wait_ack();delay(100);//等待从机测量数据//接收数据高八位//发送应答信号hum_h=i2c_read_byte(0);//接收数据低八位//发送非应答信号hum_l=i2c_read_byte(1);//将高八位和低八位合成一个数据 高八位<<8|低8位hum=hum_h<<8|hum_l;return hum;
}
)
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