原版是dht11的例程,稍加修改,可正常读取,dht22精度较高,使用液晶屏显示
单片机源程序如下:
- #include "led.h"
- #include "delay.h"
- #include "key.h"
- #include "sys.h"
- #include "lcd.h"
- #include "usart.h"
- #include "dht11.h"
-
-
- int main(void)
- {
- u16 t=0;
- u16 temperature,temperature2;
- u16 humidity,humidity2;
- delay_init(); //延时函数初始化
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置中断优先级分组为组2:2位抢占优先级,2位响应优先级
- uart_init(115200); //串口初始化为115200
- LED_Init(); //初始化与LED连接的硬件接口
- LCD_Init(); //初始化LCD
- POINT_COLOR=RED; //设置字体为红色
- LCD_ShowString(30,50,200,16,16,"SHI");
- LCD_ShowString(30,70,200,16,16,"DHT22 TEST");
- LCD_ShowString(30,90,200,16,16,"2020/2/4");
- while(DHT11_Init()) //DHT11初始化
- {
- LCD_ShowString(30,130,200,16,16,"DHT22 Error");
- delay_ms(200);
- LCD_Fill(30,130,239,130+16,WHITE);
- delay_ms(200);
- }
- LCD_ShowString(30,130,200,16,16,"DHT22 OK");
- POINT_COLOR=BLUE;//设置字体为蓝色
- LCD_ShowString(30,150,200,16,16,"Temp: . C");
- LCD_ShowString(30,170,200,16,16,"Humi: . %");
- // delay_ms(1700);
- while(1)
- {
- if(t%200==0) //每100ms读取一次
- {
- DHT11_Read_Data(&temperature,&temperature2,&humidity,&humidity2); //读取温湿度值
- LCD_ShowNum(30+40,150,temperature / 10,2,16); //显示温度
- LCD_ShowNum(30+60,150,temperature % 10,2,16);
- LCD_ShowNum(30+40,170,humidity/10,2,16); //显示湿度
- LCD_ShowNum(30+60,170,humidity%10,2,16); //显示湿度
- }
- delay_ms(1);
- t++;
- if(t==200)
- {
- t=0;
- LED0=!LED0;
- }
- }
- }
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所有资料51hei提供下载:
dht11.7z
(221.97 KB, 下载次数: 204)
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