C / C++ / MFC

dk-info wrote:

Problem:I have a project where I need to interface an embedded controller to a windows application. Ultimately I need to translate input from windows controls into a stream of serial characters. This stream is interpreted by the embedded controller to do "stuff". The serial interface here may be a "real" serial port, or through a USB-Serial converter cable.

#include <iostream>
#include <windows.h>
#include "serialPlay.h"
using namespace std;

int main(void)
{
    HANDLE hCom;
    DWORD dwRet;

    // try to open a serial port
    hCom = ::CreateFile(
       TEXT("\\\\.\\COM1"),	      // filename
       GENERIC_READ | GENERIC_WRITE,  // desired access
       0,                             // exclusive
       NULL,                          // security irrelevant
       OPEN_EXISTING,                 // it has to be there
       FILE_FLAG_OVERLAPPED,          // open asynchronous
     NULL);                           // template file

     if(hCom == INVALID_HANDLE_VALUE) {
	cout << "Cannot open serial port COM1\n";
        return PROGRAM_FAILURE;
     } else {
	// it seems to be open, try to write to it
        WriteFile( hCom, "This is testfile", 16, &dwRet, NULL );
     } // end if no handle creation failure

     return PROGRAM_SUCCESS;
} // end main()

dk-info wrote:

what is the "_T" macro?