c builder如何利用rs232與pc做串列傳輸有人可以告訴我嘛?有範例程式可以參考嘛/

提供你幾個方案,
1.自己call win api,dos的function好像也可以,不過我沒試過,請其他大大提供吧
2.利用現有元件,搜尋Async Professional,
http://www.cppfans.com/ Victor串口控件,
Mscomm,
Sourceforge上也有一些小巧的lib:http://sourceforge.net/projects/comport/
3.書:C Builder與RS-232

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=.=???

以下是一個簡單的範例,可以在BCB中編譯:
這個程式用來開啟COM2 PORT,
傳送"f001000001"字元給連接在COM2上的設備,
及一個自定的結束字元"0x0D"告知此設備此次命令已結束.
// GLOBAL VARIABLES
HANDLE hComm = NULL;
COMMTIMEOUTS ctmoNew = {0}, ctmoOld;
//---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{
DCB dcbCommPort;
// OPEN THE COMM PORT.
hComm = CreateFile("COM2",
GENERIC_READ | GENERIC_WRITE,
0,
0,
OPEN_EXISTING,
0,
0);
// IF THE PORT CANNOT BE OPENED, BAIL OUT.
if(hComm == INVALID_HANDLE_VALUE)
Application->Terminate();
// SET THE COMM TIMEOUTS.
GetCommTimeouts(hComm,&ctmoOld);
ctmoNew.ReadTotalTimeoutConstant = 100;
ctmoNew.ReadTotalTimeoutMultiplier = 0;
ctmoNew.WriteTotalTimeoutMultiplier = 0;
ctmoNew.WriteTotalTimeoutConstant = 0;
SetCommTimeouts(hComm, &ctmoNew);
// SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
// THERE ARE OTHER WAYS OF DOING SETTING THESE BUT THIS IS THE EASIEST.
// IF YOU WANT TO LATER ADD CODE FOR OTHER BAUD RATES, REMEMBER
// THAT THE ARGUMENT FOR BuildCommDCB MUST BE A POINTER TO A STRING.
// ALSO NOTE THAT BuildCommDCB() DEFAULTS TO NO HANDSHAKING.
dcbCommPort.DCBlength = sizeof(DCB);
GetCommState(hComm, &dcbCommPort);
BuildCommDCB("38400,N,8,1", &dcbCommPort);
SetCommState(hComm, &dcbCommPort);
//Send your command to COM2 PORT
TransmitCommChar(hComm, 'f');
TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '1');
TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '0');
TransmitCommChar(hComm, '1');
TransmitCommChar(hComm, 0x0D);

}
//---------------------------------------------------------------------------