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基于I2CSPI总线的温湿度采集与OLED显示

nf • 2022-12-15 • 随笔 • 阅读 6

基于I2CSPI总线的温湿度采集与OLED显示,第1张

基于I2C/SPI总线的温湿度采集与OLED显示

目录
  • 一、STM32之基于I2C的温湿度采集（AHT20）
    • 1.I2C协议
    • 2.AHT20温湿度采集
      • 程序
      • 接线烧录
      • 效果视频
  • 二、STM32在oled上显示文字滚动
    • 1.了解SPI（串行外设接口）
    • 2.字模
    • 3.代码
    • 4.接线烧录
    • 5.演示
  • 三、STM32之基于I2C的温湿度采集（AHT20）oled显示
    • 1.代码
    • 2.接线烧录演示
  • 四、滚送演示
    • 1.点阵字图
    • 2.接线烧录演示
  • 五、总结
  • 六、参考文献

一、STM32之基于I2C的温湿度采集（AHT20） 1.I2C协议

详情参考：I2C协议

2.AHT20温湿度采集 程序

主函数：

#include "delay.h"
#include "usart.h"
#include "bsp_i2c.h"


int main(void)
{	
	delay_init();     
	uart_init(115200);	//串口通信波特率115200
	IIC_Init();
		while(1)
	{
		printf("温度湿度显示");
		read_AHT20_once();
		delay_ms(1500);
  }
}

模块读取函数：

void  read_AHT20_once(void)
{
	delay_ms(10);

	reset_AHT20();//重置AHT20芯片
	delay_ms(10);

	init_AHT20();//初始化AHT20芯片
	delay_ms(10);

	startMeasure_AHT20();//开始测试AHT20芯片
	delay_ms(80);

	read_AHT20();//读取AHT20采集的到的数据
	delay_ms(5);
}

I2C读取及输出温湿度的函数：

void read_AHT20(void)
{
	uint8_t   i;

	for(i=0; i<6; i++)
	{
		readByte[i]=0;
	}
	I2C_Start();//I2C启动

	I2C_WriteByte(0x71);//I2C写数据
	ack_status = Receive_ACK();//收到的应答信息
	readByte[0]= I2C_ReadByte();//I2C读取数据
	Send_ACK();//发送应答信息

	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();
	//Send_ACK();

	I2C_Stop();//I2C停止函数
	//如果读取过程没有问题，就对读到的数据进行相应的处理
	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("读取失败");

	}
	printf("rn");
	//根据温度和湿度的计算公式，计算后输出结果，通过串口发送到上位机显示
	printf("温度:%d%d.%d",T1/100,(T1/10)%10,T1%10);
	printf("湿度:%d%d.%d",H1/100,(H1/10)%10,H1%10);
	printf("rn");
}
接线烧录

（芯片在实验时未拍照）

效果视频

AH20

二、STM32在oled上显示文字滚动 1.了解SPI（串行外设接口）

参考：《【野火®】零死角玩转STM32—F103-MINI》

2.字模

3.代码

百度网盘，提取码bphx
修改部分代码：

4.接线烧录

// OLED模块 STM32单片机
// VCC 接 DC 5V/3.3V //OLED屏电源正
// GND 接 GND //OLED屏电源地
//=液晶屏数据线接线====//
//本模块默认数据总线类型为4线制SPI
// OLED模块 STM32单片机
// D1 接 PB15 //OLED屏SPI写信号
//=液晶屏控制线接线====//
// OLED模块 STM32单片机
// CS 接 PB11 //OLED屏片选控制信号
// RES 接 PB12 //OLED屏复位控制信号
// DC 接 PB10 //OLED屏数据/命令选择控制信号
// D0 接 PB13 //OLED屏SPI时钟信号

5.演示

三、STM32之基于I2C的温湿度采集（AHT20）oled显示 1.代码

完整代码
温度显示代码：

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();
	//Send_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);   //调用Sprintf函数把DHT11的温度数据格式化到字符串数组变量strTemp中  
    sprintf(strHumi,"%.1f",b);    //调用Sprintf函数把DHT11的湿度数据格式化到字符串数组变量strHumi中  
	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);
}

点阵汉字：
`
0x00,0x00,0x23,0xF8,0x12,0x08,0x12,0x08,0x83,0xF8,0x42,0x08,0x42,0x08,0x13,0xF8,
0x10,0x00,0x27,0xFC,0xE4,0xA4,0x24,0xA4,0x24,0xA4,0x24,0xA4,0x2F,0xFE,0x00,0x00,/“温”,0/
0x00,0x00,0x27,0xF8,0x14,0x08,0x14,0x08,0x87,0xF8,0x44,0x08,0x44,0x08,0x17,0xF8,
0x11,0x20,0x21,0x20,0xE9,0x24,0x25,0x28,0x23,0x30,0x21,0x20,0x2F,0xFE,0x00,0x00,/“湿”,1/
0x01,0x00,0x00,0x80,0x3F,0xFE,0x22,0x20,0x22,0x20,0x3F,0xFC,0x22,0x20,0x22,0x20,
0x23,0xE0,0x20,0x00,0x2F,0xF0,0x24,0x10,0x42,0x20,0x41,0xC0,0x86,0x30,0x38,0x0E,/“度”,2/
0x00,0x00,0x1F,0xF0,0x10,0x10,0x10,0x10,0x1F,0xF0,0x10,0x10,0x10,0x10,0x1F,0xF0,
0x04,0x40,0x44,0x44,0x24,0x44,0x14,0x48,0x14,0x50,0x04,0x40,0xFF,0xFE,0x00,0x00,/“显”,3/
0x00,0x00,0x3F,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFE,0x01,0x00,
0x01,0x00,0x11,0x10,0x11,0x08,0x21,0x04,0x41,0x02,0x81,0x02,0x05,0x00,0x02,0x00,/“示”,4/

`
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();	    	       //延时函数初始化    	  
	uart_init(115200);	 
	IIC_Init();
		  
	NVIC_Configuration(); 	   //设置NVIC中断分组2:2位抢占优先级，2位响应优先级 	
	OLED_Init();			         //初始化OLED  
	OLED_Clear(0); 
	while(1)
	{
		//printf("温度湿度显示");
		read_AHT20_once();
		OLED_Clear(0); 
		delay_ms(1500);
  }
}
2.接线烧录演示

温度显示oled

四、滚送演示 1.点阵字图

`
0x00,0x80,0x00,0x80,0xFC,0x80,0x04,0xFC,0x05,0x04,0x49,0x08,0x2A,0x40,0x14,0x40,
0x10,0x40,0x28,0xA0,0x24,0xA0,0x45,0x10,0x81,0x10,0x02,0x08,0x04,0x04,0x08,0x02,/“欢”,0/
0x00,0x00,0x20,0x80,0x13,0x3C,0x12,0x24,0x02,0x24,0x02,0x24,0xF2,0x24,0x12,0x24,
0x12,0x24,0x12,0xB4,0x13,0x28,0x12,0x20,0x10,0x20,0x28,0x20,0x47,0xFE,0x00,0x00,/“迎”,1/
0x01,0x00,0x01,0x00,0x01,0x00,0x7F,0xFC,0x01,0x00,0x11,0x10,0x09,0x10,0x09,0x20,
0xFF,0xFE,0x03,0x80,0x05,0x40,0x09,0x20,0x31,0x18,0xC1,0x06,0x01,0x00,0x01,0x00,/“来”,2/
0x00,0x04,0xFF,0x84,0x08,0x04,0x10,0x24,0x22,0x24,0x41,0x24,0xFF,0xA4,0x08,0xA4,
0x08,0x24,0x08,0x24,0x7F,0x24,0x08,0x24,0x08,0x04,0x0F,0x84,0xF8,0x14,0x40,0x08,/“到”,3/
0x20,0x50,0x20,0x48,0x2F,0xFE,0x20,0x40,0x27,0xFC,0xFC,0x44,0x27,0xFC,0x24,0x44,
0x27,0xFC,0x24,0x44,0x20,0x08,0x2F,0xFE,0x22,0x08,0x21,0x08,0x21,0x28,0x20,0x10,/“博”,4/
0x02,0x00,0x01,0x00,0x7F,0xFE,0x40,0x02,0x88,0x04,0x0F,0xF0,0x10,0x20,0x2C,0x40,
0x03,0x80,0x1C,0x70,0xE0,0x0E,0x1F,0xF0,0x10,0x10,0x10,0x10,0x1F,0xF0,0x10,0x10,/“客”,5/

`
完整代码

2.接线烧录演示

五、总结

通过本次实验，增强了我的动手能力

六、参考文献

温湿度模块实验

欢迎分享，转载请注明来源：内存溢出

原文地址: http://outofmemory.cn/zaji/5611113.html

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