#include "StdAfx.h"
#include "SerialPortControl.h"

HANDLE hCom; //全局變量，串口句柄
HANDLE hCommThread; //全局變量，串口線程

BOOL OpenSerialPort1()

{
//打開并設置COM1
hCom=CreateFile("COM1", GENERIC_READ|GENERIC_WRITE, 0,NULL , OPEN_EXISTING, 0, NULL);
if (hCom==(HANDLE)-1)
{
   AfxMessageBox("打開COM1失敗");
    return false;
}
else
{
DCB wdcb;
GetCommState (hCom, &wdcb); 
//波特率：9600，其他：不變
wdcb.BaudRate=9600;            
SetCommState (hCom, &wdcb);
PurgeComm(hCom, PURGE_TXCLEAR);
}
return true;
}


//以一個線程不同監控串口行接收的數據
DWORD WINAPI SerialPort1ThreadProcess( HWND hWnd)  //主窗口句柄
{
   char str[101];
//讀取的字節數
   DWORD wCount; 
   while(1)
   {
  ReadFile(hCom,str, 100, &wCount, NULL);
              //收到數據
    if(wCount > 0) 
	{
     str[wCount] = '\0';
      ::PostMessage(hWnd, COM_RECVDATA, (unsigned int) str, wCount); //發送消息給對話框主窗口，以進行接收內容的顯示
	}
   }
return TRUE;
}