一、实现AHT20温湿度传感器的数据采集
参考上一次实验博客:https://blog.csdn.net/Liang55_55/article/details/121474894
二、主要代码
main函数
#include "delay.h"
#include "usart.h"
#include "bsp_i2c.h"
#include "sys.h"
#include "oled.h"
#include "gui.h"
#include "test.h"
int main(void)
{
delay_init();
uart_init(115200);
IIC_Init();
NVIC_Configuration();
OLED_Init();
OLED_Clear(0);
while(1)
{
read_AHT20_once();
OLED_Clear(0);
delay_ms(1500);
}
}
读取并显示温湿度代码
void read_AHT20(void)
{
uint8_t i;
for(i=0; i<6; i++)
{
readByte[i]=0;
}
I2C_Start();
I2C_WriteByte(0x71);
ack_status = Receive_ACK();
readByte[0]= I2C_ReadByte();
Send_ACK();
readByte[1]= I2C_ReadByte();
Send_ACK();
readByte[2]= I2C_ReadByte();
Send_ACK();
readByte[3]= I2C_ReadByte();
Send_ACK();
readByte[4]= I2C_ReadByte();
Send_ACK();
readByte[5]= I2C_ReadByte();
SendNot_Ack();
I2C_Stop();
if( (readByte[0] & 0x68) == 0x08 )
{
H1 = readByte[1];
H1 = (H1<<8) | readByte[2];
H1 = (H1<<8) | readByte[3];
H1 = H1>>4;
H1 = (H1*1000)/1024/1024;
T1 = readByte[3];
T1 = T1 & 0x0000000F;
T1 = (T1<<8) | readByte[4];
T1 = (T1<<8) | readByte[5];
T1 = (T1*2000)/1024/1024 - 500;
AHT20_OutData[0] = (H1>>8) & 0x000000FF;
AHT20_OutData[1] = H1 & 0x000000FF;
AHT20_OutData[2] = (T1>>8) & 0x000000FF;
AHT20_OutData[3] = T1 & 0x000000FF;
}
else
{
AHT20_OutData[0] = 0xFF;
AHT20_OutData[1] = 0xFF;
AHT20_OutData[2] = 0xFF;
AHT20_OutData[3] = 0xFF;
printf("lyy");
}
t=T1/10;
t1=T1%10;
a=(float)(t+t1*0.1);
h=H1/10;
h1=H1%10;
b=(float)(h+h1*0.1);
sprintf(strTemp,"%.1f",a);
sprintf(strHumi,"%.1f",b);
GUI_ShowCHinese(16,00,16,"温湿度显示",1);
GUI_ShowCHinese(16,20,16,"温度",1);
GUI_ShowString(53,20,strTemp,16,1);
GUI_ShowCHinese(16,38,16,"湿度",1);
GUI_ShowString(53,38,strHumi,16,1);
delay_ms(1500);
delay_ms(1500);
}
三、硬件连接及实现效果
实现效果 将手放在温度传感器上,温度发生改变
四、总结
这次的实验过程并不难,主要将之前做过的采集温湿度数据添加一个显示模块。
五、参考
https://blog.csdn.net/m0_58414679/article/details/121417333?spm=1001.2014.3001.5501 https://blog.csdn.net/qq_43279579/article/details/111678857
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