2410 winCE驱动在发送的同时,接收数据有所丢失---解决方法

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[ 2007-09-11 20:47:13 | Author: Admin ]

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问题现象: 在发书决的时候,接收"123",只接收到23,丢失数据概率很大
测试方法: 1、将uart的2、3pin短接
2、发送数据“123”
测试结果: 1、只接收到“23”

解决方法: 1、经过多次修改代码，并测试得到结论
代码按照以下修改，可以成功接收28个字符
（发送40个字符，第29个字符丢失，其余接收正确）

Quote

// Routine to clear any pending interrupts. Called from Init and PostInit
// to make sure we atart out in a known state.
VOID
ClearPendingInts(
PVOID pHead // @parm PVOID returned by HWinit.
)
{
  PS2410_UART_INFO pHWHead = (PS2410_UART_INFO)pHead;
  UINT32 tmpReg;

  EnterCriticalSection(&(pHWHead->RegCritSec));

  RETAILMSG(DEBUGMODE,(TEXT("ClearPendingInts /r/n")));
  try {
  //SETREG(pHWHead,rUFCON,0x6); // tx, rx fifo reset
//修改为
SETREG(pHWHead,rUFCON,0x4); // txfifo reset

    //ClearSubINTPnd(pHWHead, pHWHead->bTxINT | pHWHead->bRxINT | pHWHead->bErrINT);
//修改为
    ClearSubINTPnd(pHWHead, pHWHead->bTxINT| pHWHead->bErrINT);

    ClearINTPnd(pHWHead, pHWHead->bINT);
    tmpReg = INREG(pHWHead,rUERSTAT);
  }
  except (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION ?
    EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) {
    RETAILMSG(1,(TEXT("SL_PostInit, 0x%X - ERROR/r/n"), pHWHead));
    // Just fall through & release CritSec
  }

  LeaveCriticalSection(&(pHWHead->RegCritSec));
}

注：1、这个问题需要得到完整解决，有时间一定要深究一下