Win32 實作 RS232 c/c++－喜歡亂搞的世界

這次上課老師說要做一個 RS232 的傳輸

想說如果大家都用 BCB C# (BCB 手上有書了，C# 有元件了)

作起來好像有點簡單

所以這次就直接用 Dev - C++ 用 Win32 所用的 API下去寫

可傳可接不過 overlapped 的地方好像有點問題 ~"~

要期中了改天想到再改把 XD

寫了四、五天 Good

對 VC++ 越來越有興趣 Good

#include <cstring>
#include <iostream>
#include <windows.h>
#include <conio.h>

using namespace std;

void ReadFun();
//Create File RS232
HANDLE   hComm;
DCB       Commdcb;
//Event
long EvWait;
// Overlap
OVERLAPPED OverLap;

int main()
{
   OverLap.hEvent = CreateEvent(NULL, true, false, NULL);
   //Read Use Thread
   HANDLE   hThread;
   DWORD   dwThread;

   hComm = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);

   if (hComm == INVALID_HANDLE_VALUE)
   {
       cout << "Create File Error" << endl;
       return 0;
   }
   GetCommState(hComm, &Commdcb);
   Commdcb.BaudRate = CBR_115200;
   Commdcb.ByteSize = 8;
   Commdcb.Parity = NOPARITY;
   Commdcb.StopBits = ONESTOPBIT;



   if (!SetCommState(hComm, &Commdcb))
   {
       cout << "Set Comm Error" << endl;
       CloseHandle(hComm);
       return 0;
   }

//   EvWait = EV_CTS | EV_DSR | EV_RING | EV_RLSD | EV_BREAK | EV_RXCHAR | EV_RXFLAG | EV_TXEMPTY | EV_ERR;
   EvWait = EV_RXCHAR | EV_TXEMPTY;
   if (!SetCommMask(hComm,EvWait))
   {
       cout << "Event Set Error" << endl;
       return 0;
   }
   // setup device buffer
   SetupComm(hComm, 10240, 10240);
   // purge any information in buffer
   PurgeComm(hComm, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR);

   COMMTIMEOUTS CommTimeOuts;
   CommTimeOuts.ReadIntervalTimeout = MAXDWORD;
   CommTimeOuts.ReadTotalTimeoutMultiplier = 0 ;
    CommTimeOuts.ReadTotalTimeoutConstant = 0;
    CommTimeOuts.WriteTotalTimeoutMultiplier = 1;
    CommTimeOuts.WriteTotalTimeoutConstant = 0 ;
    SetCommTimeouts(hComm, &CommTimeOuts);

   hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ReadFun, NULL, 0, &dwThread);
   if (OverLap.hEvent == NULL)
   {
       cout << "Error Create OverLap" << endl;
       return 0;
   }

   while (1)
   {
       char output;
       DWORD dwWrite;
       dwWrite = 1;
       fflush(stdin);
       output = getch();
       if (!WriteFile(hComm, &output, 1, &dwWrite, &OverLap))
       {
           //cout << "Write Error" << endl;
           //break;
       }
   }
   CloseHandle(hThread);
   CloseHandle(hComm);
   system("pause");
   return 0;
}

void ReadFun()
{
   DWORD   dwEv;
   DWORD   dwRead;
   char   input;
   dwRead = 1;
   while (1)
   {
       WaitCommEvent(hComm, &dwEv, NULL);
       if (dwEv == EV_RXCHAR)
       {
           if (!ReadFile(hComm, &input, dwRead, &dwRead, &OverLap))
           {
               //cout << "Read Error" << endl;
               //break;
           }
           printf("%c",input);
       }
   }
}