求助LPC1343的DEMO程序在多字节传输的时候校验不正确

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楼主 | 2011-3-7 13:16 | 只看该作者回帖奖励

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demo, LPC1343, I2c, TE, ST

LPC1343的DEMO程序在多字节传输的时候校验不正确，
请各位大虾看看
int main (void)
{
  uint32_t i;
  SystemInit();
  UARTInit(115200);
  printf("\n\r-- I2C Read/Write EEPROM test -- \n\r");

  if ( I2CInit( (uint32_t)I2CMASTER ) == FALSE )
  {
while ( 1 );
  }
  I2CWriteLength = 6;
  I2CReadLength = 0;
  I2CMasterBuffer[0] = PCF8594_ADDR;
  I2CMasterBuffer[1] = 0x00;  /* address */
  I2CMasterBuffer[2] = 0x55;  /* Data0 */
  I2CMasterBuffer[3] = 0xAA;  /* Data1 */
  I2CMasterBuffer[4] = 0x12;  /* Data0 */
  I2CMasterBuffer[5] = 0x34;  /* Data1 */
  I2CEngine();
  for ( i = 0; i < 0x20000; i++ ); /* Delay after write */
  for ( i = 0; i < I2C_BUFSIZE; i++ )
  {
I2CSlaveBuffer[i] = 0x00;
  }
  /* Write SLA(W), address, SLA(R), and read one byte back. */
  I2CWriteLength = 3;
  I2CReadLength = 4;
  I2CMasterBuffer[0] = PCF8594_ADDR;
  I2CMasterBuffer[1] = 0x00;  /* address */
  I2CMasterBuffer[2] = PCF8594_ADDR | RD_BIT;
  I2CEngine();
// for (i = 0; i < 3; i++ )
// {
  if (I2CSlaveBuffer[i] != I2CMasterBuffer[i+3])
{

ErrorCount++;
}

// }
  if (ErrorCount)
  {
printf("\n\r I2C EEPROM test failed! \n\r");
  }
  else
  {
printf("\n\r I2C EEPROM test success!\n\r");

  }
  return 0;
}

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