[APM32F1] STM32F103硬件II2C存储EEPROM在极海同系列板子上的实现

#define             EEPROM_I2Cx                       I2C1

#define             EEPROM_ADDRESS                    0xA0

void MYI2C_Init(void)

{

   GPIO_InitTypeDef GPIO_InitStructure;

        I2C_InitTypeDef I2C_InitStruct;

        RCC_APB2PeriphClockCmd(        RCC_APB2Periph_GPIOB, ENABLE );        //使能GPIOB时钟

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE); //使能I2C1时钟

        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;

        GPIO_InitStructure.GPIO_Mode =GPIO_Mode_AF_OD;   

        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

        GPIO_Init(GPIOB, &GPIO_InitStructure);

   I2C_DeInit(I2C1);

   I2C_InitStruct.I2C_Ack =I2C_Ack_Enable;

        I2C_InitStruct.I2C_AcknowledgedAddress =I2C_AcknowledgedAddress_7bit ;

        I2C_InitStruct.I2C_ClockSpeed =400000;

        I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2  ;

        I2C_InitStruct.I2C_Mode =I2C_Mode_I2C;

        I2C_InitStruct.I2C_OwnAddress1 =0x00;

        I2C_Init(I2C1,&I2C_InitStruct);

        I2C_Cmd(I2C1,ENABLE);//DISABLE ENABLE

        

}

void I2C_WriteOneByte(u8 RegAddr,u8 date)

{                                  

        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));

        I2C_GenerateSTART(I2C1,ENABLE);  

        while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));//EV5

        I2C_Send7bitAddress(I2C1,EEPROM_ADDRESS,I2C_Direction_Transmitter);

   while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));//EV6

        I2C_SendData(I2C1,RegAddr);

        while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING ));//EV8

        I2C_SendData(I2C1,date);

        while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED ));//EV8—2

        I2C_GenerateSTOP(I2C1,ENABLE);

   I2C_EE_WaitEepromStandbyState();

}

void I2C_WriteLenByte(u8 RegAddr,u8* sbufdate,u8 Len)

{

        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));

        I2C_GenerateSTART(I2C1,ENABLE);  

        while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));//EV5

        I2C_Send7bitAddress(I2C1,EEPROM_ADDRESS,I2C_Direction_Transmitter);

   while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));//EV6发送

        I2C_SendData(I2C1,RegAddr);

        while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED ));//EV8

        while(Len--)

        {

        I2C_SendData(I2C1,*sbufdate);

        while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED ));//EV8

        sbufdate++;

        }

        I2C_GenerateSTOP(I2C1,ENABLE);

        I2C_EE_WaitEepromStandbyState();

}

void I2C_ReadOneByte(u8 RegAddr,u8 *da)

{

           

           while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));

        

                I2C_GenerateSTART(I2C1,ENABLE);

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));//EV5        



                I2C_Send7bitAddress(I2C1,EEPROM_ADDRESS,I2C_Direction_Transmitter);

      while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));//EV6





           I2C_SendData(I2C1,RegAddr);

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED ));//EV8



           I2C_GenerateSTART(I2C1,ENABLE);

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));//EV5



                I2C_Send7bitAddress(I2C1,EEPROM_ADDRESS,I2C_Direction_Receiver );

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));//EV6 接收



           I2C_AcknowledgeConfig(I2C1,DISABLE);//最后有一个数据时关闭应答位

           I2C_GenerateSTOP(I2C1,ENABLE);

                while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED));//

           *da=I2C_ReceiveData(I2C1);

                

//                delay_ms(10);

//                I2C_AcknowledgeConfig(I2C1,ENABLE);



}

 void I2C_ReadLenByte(u8 RegAddr,u8* sbufdate,u8 len)

{

      while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));



                I2C_GenerateSTART(I2C1,ENABLE);

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));//EV5        



                I2C_Send7bitAddress(I2C1,EEPROM_ADDRESS,I2C_Direction_Transmitter);

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));//EV6发送



           I2C_SendData(I2C1,RegAddr);

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED ));//EV8



           I2C_GenerateSTART(I2C1,ENABLE);

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));//EV5

        

                I2C_Send7bitAddress(I2C1,EEPROM_ADDRESS,I2C_Direction_Receiver );

           while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));//EV6 接收



        while(len)

        {

        if(len==1)

         {

         I2C_AcknowledgeConfig(I2C1,DISABLE);//最后有一个数据时关闭应答位

          I2C_GenerateSTOP(I2C1,ENABLE);

         }

        *sbufdate=I2C_ReceiveData(I2C1);

        while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED));

        sbufdate++;         

         len--;

        }



         I2C_AcknowledgeConfig(I2C1,ENABLE);

        

}



void I2C_EE_WaitEepromStandbyState(void)      

{

  vu16 SR1_Tmp = 0;



  do

  {

   

    I2C_GenerateSTART(EEPROM_I2Cx, ENABLE);

  

    SR1_Tmp = I2C_ReadRegister(EEPROM_I2Cx, I2C_Register_SR1);

  

    I2C_Send7bitAddress(EEPROM_I2Cx, EEPROM_ADDRESS, I2C_Direction_Transmitter);

  }while(!(I2C_ReadRegister(EEPROM_I2Cx, I2C_Register_SR1) & 0x0002));

  



  I2C_ClearFlag(EEPROM_I2Cx, I2C_FLAG_AF);



 

    I2C_GenerateSTOP(EEPROM_I2Cx, ENABLE); 

}

u8 sbuf[9];

u8 buf[9]={3,1,2,8,4,4,5,6,6};        

int main (void)

{

u8 i;

u8 *dat;

MYI2C_Init();

Usart_Init();

        dat=sbuf;

        for(i=0;i<9;i++)

        {

                I2C_WriteOneByte(i,buf[i]);

                I2C_ReadOneByte(i,dat++);

                printf("%d \r\n",sbuf[i]);

        }



        

while(1)

{



}



}