STM32F103c8t6+AHT10+OLED源程序

ID:230600 · 发表于 2020-3-23 22:51

这是c8t6的原理图

、

从核心板我们可以看到 c8t6有两个IIC接口所以我们可以使用这两个IIC接口共同使用AHT10和OLED屏
AHT10的核心代码
下面是aht10.c
从.c文件里的IIC_Init函数并且结合我们的核心板原理图我们可以看出我们使用的是I2C_1
引脚连接PB6 —SCL  PB7—SDA
#include "bsp_i2c.h"
#include "delay.h"

uint8_t ack_status=0;
uint8_t readByte[6];
uint8_t aht10_status=0;

uint32_t  H1=0;  //Humility
uint32_t  T1=0;  //Temperature

uint8_t  AHT10_OutData[4];
uint8_t  AHT10sendOutData[10] = {0xFA, 0x06, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF};

void IIC_Init(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      RCC_APB2PeriphClockCmd(       RCC_APB2Periph_GPIOB, ENABLE );

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; //推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      IIC_SCL=1;
      IIC_SDA=1;

}
//产生IIC起始信号
void IIC_Start(void)
{
      SDA_OUT();    //sda线输出
      IIC_SDA=1;
      IIC_SCL=1;
      delay_us(4);
      IIC_SDA=0;//START:when CLK is high,DATA change form high to low
      delay_us(4);
      IIC_SCL=0;//钳住I2C总线，准备发送或接收数据
}
//产生IIC停止信号
void IIC_Stop(void)
{
      SDA_OUT();//sda线输出
      IIC_SCL=0;
      IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
      delay_us(4);
      IIC_SCL=1;
      IIC_SDA=1;//发送I2C总线结束信号
      delay_us(4);
}
//等待应答信号到来
//返回值：1，接收应答失败
//       0，接收应答成功
u8 IIC_Wait_Ack(void)
{
      u8 ucErrTime=0;
      SDA_IN();    //SDA设置为输入
      IIC_SDA=1;delay_us(1);
      IIC_SCL=1;delay_us(1);
      while(READ_SDA)
      {
            ucErrTime++;
            if(ucErrTime>250)
            {
                     IIC_Stop();
                     return 1;
            }
      }
      IIC_SCL=0;//时钟输出0
      return 0;
}
//产生ACK应答
void IIC_Ack(void)
{
      IIC_SCL=0;
      SDA_OUT();
      IIC_SDA=0;
      delay_us(2);
      IIC_SCL=1;
      delay_us(2);
      IIC_SCL=0;
}
//不产生ACK应答
void IIC_NAck(void)
{
      IIC_SCL=0;
      SDA_OUT();
      IIC_SDA=1;
      delay_us(2);
      IIC_SCL=1;
      delay_us(2);
      IIC_SCL=0;
}
//IIC发送一个字节
//返回从机有无应答
//1，有应答
//0，无应答
void IIC_Send_Byte(u8 txd)
{
u8 t;
            SDA_OUT();
IIC_SCL=0;//拉低时钟开始数据传输
for(t=0;t<8;t++)
{
      IIC_SDA=(txd&0x80)>>7;
      txd<<=1;
            delay_us(2); //对TEA5767这三个延时都是必须的
            IIC_SCL=1;
            delay_us(2);
            IIC_SCL=0;
            delay_us(2);
}
}
//读1个字节，ack=1时，发送ACK，ack=0，发送nACK
u8 IIC_Read_Byte(unsigned char ack)
{
      unsigned char i,receive=0;
      SDA_IN();//SDA设置为输入
  for(i=0;i<8;i++ )
      {
IIC_SCL=0;
delay_us(2);
            IIC_SCL=1;
receive<<=1;
if(READ_SDA)receive++;
            delay_us(1);
  }
      if (!ack)
                     IIC_NAck();//发送nACK
      else
                     IIC_Ack(); //发送ACK
      return receive;
}

void IIC_WriteByte(uint16_t addr,uint8_t data,uint8_t device_addr)
{
      IIC_Start();

      if(device_addr==0xA0) //eeprom地址大于1字节
            IIC_Send_Byte(0xA0 + ((addr/256)<<1));//发送高地址
      else
            IIC_Send_Byte(device_addr);          //发器件地址
      IIC_Wait_Ack();
      IIC_Send_Byte(addr&0xFF); //发送低地址
      IIC_Wait_Ack();
      IIC_Send_Byte(data);    //发送字节
      IIC_Wait_Ack();
  IIC_Stop();//产生一个停止条件
      if(device_addr==0xA0) //
            delay_ms(10);
      else
            delay_us(2);
}

uint16_t IIC_ReadByte(uint16_t addr,uint8_t device_addr,uint8_t ByteNumToRead)  //读寄存器或读数据
{
            uint16_t data;
            IIC_Start();
            if(device_addr==0xA0)
                     IIC_Send_Byte(0xA0 + ((addr/256)<<1));
            else
                     IIC_Send_Byte(device_addr);
            IIC_Wait_Ack();
            IIC_Send_Byte(addr&0xFF); //发送低地址
            IIC_Wait_Ack();

            IIC_Start();
            IIC_Send_Byte(device_addr+1);          //发器件地址
            IIC_Wait_Ack();
            if(ByteNumToRead == 1)//LM75温度数据为11bit
            {
                     data=IIC_Read_Byte(0);
            }
            else
                     {
                              data=IIC_Read_Byte(1);
                              data=(data<<8)+IIC_Read_Byte(0);
                     }
            IIC_Stop();//产生一个停止条件
            return data;
}

/**********
*上面部分为IO口模块I2C配置
*
*从这以下开始为AHT10的配置I2C
*函数名有IIC和I2C的区别，请注意！！！！！
*
*2020/2/23最后修改日期
*
***********/
void  read_AHT10_once(void)
{
      delay_ms(10);

      reset_AHT10();
      delay_ms(10);

      init_AHT10();
      delay_ms(10);

      startMeasure_AHT10();
      delay_ms(80);

      read_AHT10();
      delay_ms(5);
}

void  reset_AHT10(void)
{

      I2C_Start();

      I2C_WriteByte(0x70);
      ack_status = Receive_ACK();
      if(ack_status) printf("1");
      else printf("1-n-");
      I2C_WriteByte(0xBA);
      ack_status = Receive_ACK();
            if(ack_status) printf("2");
      else printf("2-n-");
      I2C_Stop();

      /*
      AHT10_OutData[0] = 0;
      AHT10_OutData[1] = 0;
      AHT10_OutData[2] = 0;
      AHT10_OutData[3] = 0;
      */
}

void  init_AHT10(void)
{
      I2C_Start();

      I2C_WriteByte(0x70);
      ack_status = Receive_ACK();
      if(ack_status) printf("3");
      else printf("3-n-");
      I2C_WriteByte(0xE1);
      ack_status = Receive_ACK();
      if(ack_status) printf("4");
      else printf("4-n-");
      I2C_WriteByte(0x08);
      ack_status = Receive_ACK();
      if(ack_status) printf("5");
      else printf("5-n-");
      I2C_WriteByte(0x00);
      ack_status = Receive_ACK();
      if(ack_status) printf("6");
      else printf("6-n-");
      I2C_Stop();
}

void  startMeasure_AHT10(void)
{
      //------------
      I2C_Start();

      I2C_WriteByte(0x70);
      ack_status = Receive_ACK();
      if(ack_status) printf("7");
      else printf("7-n-");
      I2C_WriteByte(0xAC);
      ack_status = Receive_ACK();
      if(ack_status) printf("8");
      else printf("8-n-");
      I2C_WriteByte(0x33);
      ack_status = Receive_ACK();
      if(ack_status) printf("9");
      else printf("9-n-");
      I2C_WriteByte(0x00);
      ack_status = Receive_ACK();
      if(ack_status) printf("10");
      else printf("10-n-");
      I2C_Stop();
}

void read_AHT10(void)
{
      uint8_t i;

      for(i=0; i<6; i++)
      {
            readByte[ i]=0;
      }

      //-------------
      I2C_Start();

      I2C_WriteByte(0x71);
      ack_status = Receive_ACK();
      if(ack_status) printf("11");
      else printf("11-n-");
      readByte[0]= I2C_ReadByte();
      printf("test0:%d",readByte[0]);
      Send_ACK();

      readByte[1]= I2C_ReadByte();
      printf("test1:%d",readByte[1]);
      Send_ACK();

      readByte[2]= I2C_ReadByte();
      printf("test2:%d",readByte[2]);
      Send_ACK();

      readByte[3]= I2C_ReadByte();
      printf("test3:%d",readByte[3]);
      Send_ACK();

      readByte[4]= I2C_ReadByte();
      printf("test4:%d",readByte[4]);
      Send_ACK();

      readByte[5]= I2C_ReadByte();
      printf("test5:%d",readByte[5]);
      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;

            AHT10_OutData[0] = (H1>>8) & 0x000000FF;
            AHT10_OutData[1] = H1 & 0x000000FF;

            AHT10_OutData[2] = (T1>>8) & 0x000000FF;
            AHT10_OutData[3] = T1 & 0x000000FF;
            printf("成功了");
      }
      else
      {
            AHT10_OutData[0] = 0xFF;
            AHT10_OutData[1] = 0xFF;

            AHT10_OutData[2] = 0xFF;
            AHT10_OutData[3] = 0xFF;
            printf("失败了");

      }
      printf("\r\n");
      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("\r\n");
}

uint8_t  Receive_ACK(void)
{
      uint8_t result=0;
      uint8_t cnt=0;

      IIC_SCL = 0;
      SDA_IN();
      delay_us(4);

      IIC_SCL = 1;
      delay_us(4);

      while(READ_SDA && (cnt<100))
      {
            cnt++;
      }

      IIC_SCL = 0;
      delay_us(4);

      if(cnt<100)
      {
            result=1;
      }
      return result;
}

void  Send_ACK(void)
{
      SDA_OUT();
      IIC_SCL = 0;
      delay_us(4);

      IIC_SDA = 0;
      delay_us(4);

      IIC_SCL = 1;
      delay_us(4);
      IIC_SCL = 0;
      delay_us(4);

      SDA_IN();
}

void  SendNot_Ack(void)
{
      SDA_OUT();
      IIC_SCL = 0;
      delay_us(4);

      IIC_SDA = 1;
      delay_us(4);

      IIC_SCL = 1;
      delay_us(4);

      IIC_SCL = 0;
      delay_us(4);

      IIC_SDA = 0;
      delay_us(4);
}

void I2C_WriteByte(uint8_t  input)
{
      uint8_t  i;
      SDA_OUT();
      for(i=0; i<8; i++)
      {
            IIC_SCL = 0;
            delay_ms(5);

            if(input & 0x80)
            {
                     IIC_SDA = 1;
                     //delaymm(10);
            }
            else
            {
                     IIC_SDA = 0;
                     //delaymm(10);
            }

            IIC_SCL = 1;
            delay_ms(5);

            input = (input<<1);
      }

      IIC_SCL = 0;
      delay_us(4);

      SDA_IN();
      delay_us(4);
}

uint8_t I2C_ReadByte(void)
{
      uint8_t  resultByte=0;
      uint8_t  i=0, a=0;

      IIC_SCL = 0;
      SDA_IN();
      delay_ms(4);

      for(i=0; i<8; i++)
      {
            IIC_SCL = 1;
            delay_ms(3);

            a=0;
            if(READ_SDA)
            {
                     a=1;
            }
            else
            {
                     a=0;
            }

            //resultByte = resultByte | a;
            resultByte = (resultByte << 1) | a;

            IIC_SCL = 0;
            delay_ms(3);
      }

      SDA_IN();
      delay_ms(10);

      return resultByte;
}

void  set_AHT10sendOutData(void)
{
      /* --------------------------
      * 0xFA 0x06 0x0A temperature(2 Bytes) humility(2Bytes) short Address(2 Bytes)
      * And Check (1 byte)
      * -------------------------*/
      AHT10sendOutData[3] = AHT10_OutData[0];
      AHT10sendOutData[4] = AHT10_OutData[1];
      AHT10sendOutData[5] = AHT10_OutData[2];
      AHT10sendOutData[6] = AHT10_OutData[3];

//       AHT10sendOutData[7] = (drf1609.shortAddress >> 8) & 0x00FF;
//       AHT10sendOutData[8] = drf1609.shortAddress  & 0x00FF;

//       AHT10sendOutData[9] = getXY(AHT10sendOutData,10);
}

void  I2C_Start(void)
{
      SDA_OUT();
      IIC_SCL = 1;
      delay_ms(4);

      IIC_SDA = 1;
      delay_ms(4);
      IIC_SDA = 0;
      delay_ms(4);

      IIC_SCL = 0;
      delay_ms(4);
}

void  I2C_Stop(void)
{
      SDA_OUT();
      IIC_SDA = 0;
      delay_ms(4);

      IIC_SCL = 1;
      delay_ms(4);

      IIC_SDA = 1;
      delay_ms(4);
}

下面是aht10.h
#ifndef __BSP_I2C_H
#define __BSP_I2C_H

#include "sys.h"
#include "delay.h"
#include "usart.h"
//使用IIC1 挂载M24C02,OLED,LM75AD,HT1382 PB6,PB7

#define SDA_IN()  {GPIOB->CRL&=0X0FFFFFFF;GPIOB->CRL|=(u32)8<<28;}
#define SDA_OUT() {GPIOB->CRL&=0X0FFFFFFF;GPIOB->CRL|=(u32)3<<28;}

//IO操作函数
#define IIC_SCL PBout(6) //SCL
#define IIC_SDA PBout(7) //SDA
#define READ_SDA PBin(7)  //输入SDA

//IIC所有操作函数
void IIC_Init(void);             //初始化IIC的IO口
void IIC_Start(void);                               //发送IIC开始信号
void IIC_Stop(void);                               //发送IIC停止信号
void IIC_Send_Byte(u8 txd);                      //IIC发送一个字节
u8 IIC_Read_Byte(unsigned char ack);//IIC读取一个字节
u8 IIC_Wait_Ack(void);                               //IIC等待ACK信号
void IIC_Ack(void);                                     //IIC发送ACK信号
void IIC_NAck(void);                               //IIC不发送ACK信号

void IIC_WriteByte(uint16_t addr,uint8_t data,uint8_t device_addr);
uint16_t IIC_ReadByte(uint16_t addr,uint8_t device_addr,uint8_t ByteNumToRead);//寄存器地址，器件地址，要读的字节数

void  read_AHT10_once(void);
void  reset_AHT10(void);
void  init_AHT10(void);
void  startMeasure_AHT10(void);
void  read_AHT10(void);
uint8_t  Receive_ACK(void);
void  Send_ACK(void);
void  SendNot_Ack(void);
void I2C_WriteByte(uint8_t  input);
uint8_t I2C_ReadByte(void);
void  set_AHT10sendOutData(void);
void  I2C_Start(void);
void  I2C_Stop(void);
#endif

主要代码我压缩成文件了
OLED的引脚连接是
PB10-SCL
PB11-SDA
可以直接使用
全部资料51hei下载地址：

AHT10+OLED.7z (197.08 KB, 下载次数: 141)

ID:328334 · 发表于 2020-4-1 21:49

请问你iic两根线有没有接上拉电阻

ID:660780 · 发表于 2020-4-10 12:25

感谢分享。。。。。。

ID:59363 · 发表于 2020-9-1 09:25

多谢分享，希望能成功读出

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STM32F103c8t6+AHT10+OLED源程序

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