windows串口写的问题

[legendhui]

我想直接按十六进制发送数据，就把值直接赋给字符型数组，别的值都还好说，接收到的都正确，可是为什么发送0就不好使，请大家指教。我的程序如下：
Sport.InitPort(this,1,9600,'n',8,1);
Sport.StartMonitoring();
char buf[100];
memset(&buf, 0, sizeof(buf));
buf[0]=0xa5;
buf[1]=0xc4;
buf[2]=0xa1;
buf[3]=0x40;
buf[4]=0x00;
buf[5]=0x00;
buf[6]=0x00;
buf[7]=0xf5;
Sport.WriteToPort(buf);

[auly403]

你所说他的是谁,如何是BUf, 就认为是.
串口就不认为.

[nuaawenlin]

0x00是结束符

[wujian53]

我有自己写的串口类库， 可以发16进制， 类似(Com1.Write(p, 8);), 比较简单；
blog.csdn.net/wujian53

[hjunxu]

他认为0x00是结束符吧

[legendhui]

怎么知道0x00是结束符啊？！
我在程序中怎么找不到？

[onestation]

Sport.WriteToPort(buf);
这个函数连buf的长度都不知道，肯定不对啊！

[一条晚起的虫]

他的WriteToPort（）大概是发送以‘\0’结尾的字符串的，猜的
因为他没有发送长度

[legendhui]

void CSerialPort::WriteChar(CSerialPort* port)
{
BOOL bWrite = TRUE;
BOOL bResult = TRUE;

DWORD BytesSent = 0;

ResetEvent(port->m_hWriteEvent);

// Gain ownership of the critical section
EnterCriticalSection(&port->m_csCommunicationSync);

if (bWrite)
{
// Initailize variables
port->m_ov.Offset = 0;
port->m_ov.OffsetHigh = 0;

// Clear buffer
PurgeComm(port->m_hComm, PURGE_RXCLEAR | PURGE_TXCLEAR | PURGE_RXABORT | PURGE_TXABORT);

bResult = WriteFile(port->m_hComm, // Handle to COMM Port
port->m_szWriteBuffer, // Pointer to message buffer in calling finction
strlen((char*)port->m_szWriteBuffer), // Length of message to send
&BytesSent, // Where to store the number of bytes sent
&port->m_ov); // Overlapped structure

// deal with any error codes
if (!bResult)
{
DWORD dwError = GetLastError();
switch (dwError)
{
case ERROR_IO_PENDING:
{
// continue to GetOverlappedResults()
BytesSent = 0;
bWrite = FALSE;
break;
}
default:
{
// all other error codes
port->ProcessErrorMessage("WriteFile()");
}
}
}
else
{
LeaveCriticalSection(&port->m_csCommunicationSync);
}
} // end if(bWrite)

if (!bWrite)
{
bWrite = TRUE;

bResult = GetOverlappedResult(port->m_hComm, // Handle to COMM port
&port->m_ov, // Overlapped structure
&BytesSent, // Stores number of bytes sent
TRUE); // Wait flag

LeaveCriticalSection(&port->m_csCommunicationSync);

// deal with the error code
if (!bResult)
{
port->ProcessErrorMessage("GetOverlappedResults() in WriteFile()");
}
} // end if (!bWrite)

// Verify that the data size send equals what we tried to send
if (BytesSent != strlen((char*)port->m_szWriteBuffer))
{
TRACE("WARNING: WriteFile() error.. Bytes Sent: %d; Message Length: %d\n", BytesSent, strlen((char*)port->m_szWriteBuffer));
}
}