STR9好冷清呀，版主。。。（附I2c源码)

只看该作者 · 2009-4-16 14:39

玩这个片子一年啦，可没找到战友呀！我的qq是8814405，有搞这个加我，最近有其他项目，暂时没搞，逛到这里，str9还是冷冷清清，悲哀呀。。。。看到有人问I2C问题，贴上我以前的代码，看能不能借鉴？算是推广一下了！

/*******************************************************************************
* Function Name  : SendI2C1Data
* Description    : 发送I2c1的数据
* Input1         : I2c1地址
* Input2         : I2c1数据指针
* Input3         : I2c1数据长度
* Output         : None
* Return         : 1：成功  0: 失败
*******************************************************************************/
unsigned char SendI2C1Data(unsigned char I2cAddress, unsigned char *p, unsigned char len)
{
  unsigned char i=0;
  unsigned long j=0,timeup=500;

    //I2C_Cmd (I2C0, ENABLE);
  I2C_GenerateStart (I2C1, ENABLE);
  /* Test on EV5 and clear it */
  do
  {
    j++;
    if( I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) ) break;  // EV5
  }while(j<timeup);
  if(j==timeup) return 0;

  /* Send I2C1 Address for write */
    I2C_Send7bitAddress (I2C1, I2cAddress, I2C_MODE_TRANSMITTER);
  /* Test on EV6 and clear it */

  j=0;
  do
  {
    j++;
    if( I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECTED) ) break;  // EV6
  }while(j<timeup);
  if(j==timeup) return 0;

// while(!I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); //EV8
  /* Clear EV6 by set again the PE bit */
  I2C_Cmd (I2C1, ENABLE);
  /* Send Data to write on I2C1 slave */
  while (i < len)
  {
    /* Send Master data */
    I2C_SendData(I2C1, p[i++]);
    /* Test on EV8 and clear it */
    j=0;
    do
    {
      j++;
      if(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) break; //EV8
    }while(j<timeup);
    if(j==timeup) return 0;
  }

  /* Generate STOP condition to close communication */
  I2C_GenerateSTOP (I2C1, ENABLE);

  //I2C_Cmd(I2C0, DISABLE);

  return 1;
}

/*******************************************************************************
* Function Name  : ReadI2C1Data
* Description    : 接收I2c1的数据
* Input1         : I2c1地址
* Input2         : I2c1数据指针
* Input3         : I2c1数据长度
* Output         : None
* Return         : 1：成功  0: 失败
*******************************************************************************/
unsigned char ReadI2C1Data(unsigned char I2cAddress, unsigned char *p, unsigned char len)
{
  unsigned char i=0;
   unsigned long j=0,timeup=500;
  //I2C_Cmd (I2C0, ENABLE);

  I2C_GenerateStart (I2C1, ENABLE);
  do
  {
    j++;
    if( I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) ) break;  // EV5
  }while(j<timeup);
  if(j==timeup) return 0;

  I2C_Send7bitAddress (I2C1, I2cAddress, I2C_MODE_RECEIVER);

  j=0;
  do
  {
    j++;
    if( I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECTED) ) break;  // EV6
  }while(j<timeup);
  if(j==timeup) return 0;

  I2C_Cmd (I2C1, ENABLE);

  I2C_AcknowledgeConfig (I2C1, ENABLE);

  if(len==1)
  {
       I2C_AcknowledgeConfig (I2C1, DISABLE);
       I2C_GenerateSTOP (I2C1, ENABLE);
  }

  for(i=0;i<len;i++)
  {

    j=0;
    do
    {
      j++;
      if( I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED) ) break;  // EV6
    }while(j<timeup);
    if(j==timeup) return 0;

     p = I2C_ReceiveData(I2C1);
     if(i==len-2)
     {
       I2C_AcknowledgeConfig (I2C1, DISABLE);
       I2C_GenerateSTOP (I2C1, ENABLE);
     }
  }

  //I2C_Cmd(I2C0, DISABLE);
  return 1;
}