中科昊芯DSC28034湖人版OLED屏上显示温湿度值

 

/****************************************************************** 编  译  器：Haawking IDE V0.1.2   D  S  P：dsc28034湖人板 电 脑 配 置：Windows10 专业版; 64 位操作系统 仿  真  器：HX100v2 使  用  库：无 作         用：在OLED屏上显示温湿度值 说         明：Debug as程序后在oled屏上显示温湿度数值 版         本：V0.0.1 ******************************************************************/

第一步：创建工程

上篇文章中有具体流程，这里不做过多赘述

第二步：编程

根据官方提供的DHT11使用手册。流程如下：

DHT11链接：https://pan.baidu.com/s/1DxBY9vMtx5BlxtpIx6okKQ 

提取码：8034

       将GPIO0设为普通IO口，并设置为输出状态，拉高主机，拉低主机18-20ms，拉高主机20-40us；设置为输入状态，等待从机响应；响应过后判断输入的高电平，在高电平段延时40us后仍为高电平则输入1，为低电平则输入0。

程序如下：

 

DHT11.c

 

//初始化GPIO0

void gpio0_init(void)

{

EALLOW;

GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0;

GpioCtrlRegs.GPAMUX1.bit.GPIO0 =0;

GpioCtrlRegs.GPAQSEL1.bit.GPIO0 = 0;

EDIS;

}

//主机输出设置

void DHT11_Rst(void)

{

uchar i;

EALLOW;

DAT_DIR=1;

EDIS;

// // test

// while(1) {

// DAT= 0;

// DELAY_US(10);

// DAT = 1;

// DELAY_US(10);

// }

DAT= 0;

DELAY_US(300000);

DAT = 1;

DELAY_US(350);

}

（注：程序中的test目的是测试延时函数DELAY_US（）的真实值）

 

//等待DHT11的响应

Uint8 Dht11_Check(void){

Uint8 retry=0;

EALLOW;

DAT_DIR=0;

EDIS;

    while (DAT&&retry<100){

        retry++;

        DELAY_US(1);

    }

    if(retry>=100)return 1; else retry=0;

    while (!DAT&&retry<100){

        retry++;

        DELAY_US(1);

    }

    if(retry>=100)return 1;else return 0;

}

 

//初始化DHT11

Uint8 DHT11_Init (void){

DHT11_Rst();

return Dht11_Check();

}

//从DHT11读取一个位

uchar Dht11_ReadBit(void){

    uchar retry=0;

    while (DAT&&retry<100){

           retry++;

            DELAY_US(1);

        }

       retry=0;

    while(!DAT&&retry<100){

      retry++;

      DELAY_US(1);

    }

    DELAY_US(400);

    if(DAT)return 1; else return 0;

}

 

//从DHT11读取一个字节

uchar Dht11_ReadByte(void){

    uchar i,dat;

    dat=0;

    for (i=0;i<8;i++){

        dat<<=1;

        dat|=Dht11_ReadBit();

    }

    return dat;

}

 

//读取一次数据

Uint8 DHT11_ReadData(Uint8 *temp,u8 *humi){

uchar buf[5];

uchar i;

DHT11_Rst();

    if(Dht11_Check()==0){

        for(i=0;i<5;i++){

            buf[i]=Dht11_ReadByte();

        }

        if((buf[0]+buf[1]+buf[2]+buf[3])==buf[4]){

        *humi=buf[0];

        *temp=buf[2];

        }

    }

}

 

DHT11.h

 

#define uchar                  unsigned char

#define DAT_DIR GpioCtrlRegs.GPADIR.bit.GPIO0 

#define DAT GpioDataRegs.GPADAT.bit.GPIO0

 

extern char temp[4];

 

void gpio0_init(void);

void DHT11_Rst(void);

Uint8 Dht11_Check(void);

Uint8 DHT11_Init (void);

uchar Dht11_ReadBit(void);

uchar Dht11_ReadByte(void);

Uint8 DHT11_ReadData(Uint8 *temp,u8 *humi);

 

这里给出OLED屏.h取字模板，OLED模块例程主页有，还请自行参考

 

static int Hzk[][32]=

{

{0x10,0x60,0x02,0x8C,0x00,0x00,0xFE,0x92,0x92,0x92,0x92,0x92,0xFE,0x00,0x00,0x00},

{0x04,0x04,0x7E,0x01,0x40,0x7E,0x42,0x42,0x7E,0x42,0x7E,0x42,0x42,0x7E,0x40,0x00},/*"温",0*/

 

{0x10,0x60,0x02,0x8C,0x00,0xFE,0x92,0x92,0x92,0x92,0x92,0x92,0xFE,0x00,0x00,0x00},

{0x04,0x04,0x7E,0x01,0x44,0x48,0x50,0x7F,0x40,0x40,0x7F,0x50,0x48,0x44,0x40,0x00},/*"湿",1*/

 

{0x00,0x00,0xFC,0x24,0x24,0x24,0xFC,0x25,0x26,0x24,0xFC,0x24,0x24,0x24,0x04,0x00},

{0x40,0x30,0x8F,0x80,0x84,0x4C,0x55,0x25,0x25,0x25,0x55,0x4C,0x80,0x80,0x80,0x00},/*"度",2*/

};

static int F8X16[]=

{

0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,/*"0",0*/

0x00,0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,/*"1",1*/

0x00,0x70,0x08,0x08,0x08,0x08,0xF0,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,/*"2",2*/

0x00,0x30,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x18,0x20,0x21,0x21,0x22,0x1C,0x00,/*"3",3*/

0x00,0x00,0x80,0x40,0x30,0xF8,0x00,0x00,0x00,0x06,0x05,0x24,0x24,0x3F,0x24,0x24,/*"4",4*/

0x00,0xF8,0x88,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x20,0x20,0x20,0x11,0x0E,0x00,/*"5",5*/

0x00,0xE0,0x10,0x88,0x88,0x90,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x20,0x1F,0x00,/*"6",6*/

0x00,0x18,0x08,0x08,0x88,0x68,0x18,0x00,0x00,0x00,0x00,0x3E,0x01,0x00,0x00,0x00,/*"7",7*/

0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,/*"8",8*/

0x00,0xF0,0x08,0x08,0x08,0x10,0xE0,0x00,0x00,0x01,0x12,0x22,0x22,0x11,0x0F,0x00,/*"9",9*/

0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,/*"C",10*/

0xF0,0x08,0xF0,0x80,0x60,0x18,0x00,0x00,0x00,0x31,0x0C,0x03,0x1E,0x21,0x1E,0x00,/*"%",11*/

0x00,0x00,0x04,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*"^",12*/

0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,/*"R",13*/

0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,/*"H",14*/

};

 

main.c

 

void delay();

Uint8 temperature;

Uint8 humidity;

void main(void)

{

InitSysCtrl();

DINT;

InitPieCtrl();

IER_DISABLE(0xFFFF);

IFR_DISABLE(0xFFFF);

InitPieVectTable();

InitCpuTimers();

    gpio0_init();

    I2C_GPIO_Config_OLED();

    OLED_Init();

OLED_Clear();

OLED_ShowCHinese(0,0,0);

OLED_ShowCHinese(16,0,2);

OLED_ShowCHinese(0,4,1);

OLED_ShowCHinese(16,4,2);

    while(1)

    {

          DHT11_ReadData(&temperature,&humidity);

      OLED_ShowNum(40,0,temperature,2,16);

      OLED_ShowNum(40,4,humidity,2,16);

OLED_ShowChar(56,0,12,16);

OLED_ShowChar(64,0,10,16);

OLED_ShowChar(56,4,11,16);

OLED_ShowChar(64,4,13,16);

OLED_ShowChar(72,4,14,16);

      delay();

   }

}

void delay(void)

{

for(int i=0;i<50000;i++);

}

第三步：调试与显示温湿度

调试无错后，全速状态下显示的温湿度值会因环境温湿度的变化而变化，显示效果如下：

特别鸣谢 原创作者 博主「晟逸轩」