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标题: stm32硬件IIC读写温度与ADC程序 [打印本页]

作者: 张衍波 时间: 2015-9-18 10:44
标题: stm32硬件IIC读写温度与ADC程序

整理的ADS1110和adt7410的STM32 读写程序，使用IIC硬件操作，没有使用DMA

uint8_t buf[13],Pbuf[5];

void Iic_Init(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      I2C_InitTypeDef I2C_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
            RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);

      //PB6-I2C1_SCL PB7-I2C1_SDA PB10-I2C2_SCL PB11-I2C2_SDA
      /* Configure IO connected to IIC*********************/
      GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10 | GPIO_Pin_11;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
      I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
      I2C_InitStructure.I2C_OwnAddress1 = 0X010;
      I2C_InitStructure.I2C_Ack = I2C_Ack_Disable;
      I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
      I2C_InitStructure.I2C_ClockSpeed = 100000;

      I2C_Cmd(I2C2, ENABLE);

      I2C_Init(I2C2, &I2C_InitStructure);

      /*允许1字节1应答模式*/
      I2C_AcknowledgeConfig(I2C2, ENABLE);
}

/**********************************************************************/
/*IIC写一个字节                                                    */
/*                                                                                                                                        */
/**********************************************************************/
void I2C_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte,bool UseAddress)
{
      while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));

      I2C_GenerateSTART(I2C2,ENABLE);
      //产生起始条件
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
      //等待ACK

      I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter);
      //向设备发送设备地址
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
      //等待ACK
      if(FALSE != UseAddress){
/*********************************************************************************/
      I2C_SendData(I2C2, write_address);
      //寄存器地址
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/*********************************************************************************/
  }    //等待ACK
      I2C_SendData(I2C2, byte);
      //发送数据
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

      //发送完成
      I2C_GenerateSTOP(I2C2, ENABLE);
      //产生结束信号
      if(TRUE == UseAddress){
      do
      {
            /* Send START condition */
            I2C_GenerateSTART(I2C2, ENABLE);
            /* Read I2C1 SR1 register */
            /* Send EEPROM address for write */
            I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter);
      }while(!(I2C_ReadRegister(I2C2, I2C_Register_SR1) & 0x0002));

      /* Clear AF flag */
      I2C_ClearFlag(I2C2, I2C_FLAG_AF);
      /* STOP condition */
      I2C_GenerateSTOP(I2C2, ENABLE);
                     }
}

/**********************************************************************/
/*IIC读数据                                                          */
/*                                                                                                                                        */
/**********************************************************************/
unsigned char I2C_ReadByte(unsigned char  id,
                                                                                                            unsigned char read_address,
                                                                                                            unsigned char *pBuf,
                                                                                                            bool UseAddress)
{

      while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));
      //等待I2C
/**************************************************************************/
      if(TRUE==UseAddress)
      {
      I2C_GenerateSTART(I2C2, ENABLE);
      //产生起始信号
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));

      //EV5
      I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter);
      //发送地址
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

      //EV6
      I2C_Cmd(I2C1, ENABLE);
      //重新设置可以清楚EV6
      I2C_SendData(I2C2, read_address);
      //发送读得地址
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
      }
/**************************************************************************/
      //EV8
      I2C_GenerateSTART(I2C2, ENABLE);
      //重新发送
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));

      //EV5
      I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver);
      //发送读地址
      while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

      //EV6
            if(FALSE==UseAddress)
            {
      //关闭应答和停止条件产生
                                    while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));

                                    *pBuf++ = I2C_ReceiveData(I2C2);
            //关闭应答和停止条件产生
                                    while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));

                                    *pBuf++ = I2C_ReceiveData(I2C2);
   }

                                    I2C_AcknowledgeConfig(I2C2, DISABLE);
                                    I2C_GenerateSTOP(I2C2, ENABLE);

                                    while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));

                                    *pBuf = I2C_ReceiveData(I2C2);

      I2C_AcknowledgeConfig(I2C2, ENABLE);

      return 0;
}

void ADT7410_Read(uint8_t *pbuf,uint8_t Number,uint8_t StartAddress,bool UseAddress)
{
      uint8_t num=Number;
      uint8_t addr=StartAddress;
      while(num--)
            I2C_ReadByte(0x94,addr++,pbuf++,UseAddress);

}

void ADS1110_Read(uint8_t *pbuf,uint8_t Number,uint8_t StartAddress,bool UseAddress)
{

                     I2C_ReadByte(0x90,StartAddress,pbuf,UseAddress);

}
void ADT7410_Write(uint8_t StartAddress,uint8_t SetData,bool UseAddress)
{

                     I2C_WriteByte(0x94,StartAddress,SetData,UseAddress);

}
void ADS1110_Write(uint8_t StartAddress,uint8_t SetData,bool UseAddress)
{

                     I2C_WriteByte(0x90,StartAddress,SetData,UseAddress);

}

static void Delay( uint16_t nCount)
{
  for(; nCount != 0; nCount--);
}

int main(void)
{

  SystemInit();
  Iic_Init();
      ADT7410_Write(3,0X80,TRUE);
      ADS1110_Write(0,0x8c,FALSE);
  while (1){
               ADT7410_Read(buf,12,0,TRUE);
               Delay(5000);
               ADS1110_Read (Pbuf,0,0,FALSE);
               Delay(5000);

      }

}转载

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