serialportcontrol.cpp

一个串口编程的例程

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

HANDLE hCom;//全局变量，串口句柄
HANDLE hCommThread;//全局变量，串口线程
SerialPortData comData;//全局变量，串口数据

BOOL OpenSerialPort1()
{
	//打开并设置COM1
	hCom=CreateFile("COM1", GENERIC_READ|GENERIC_WRITE, 0, NULL ,OPEN_EXISTING, 0,NULL);
	if (hCom==(HANDLE)-1)
	{
		AfxMessageBox("打开COM1失败");
		return false;
	}
	else
	{
		DCB wdcb;
		GetCommState (hCom,&wdcb);
		wdcb.BaudRate=9600;
		SetCommState (hCom,&wdcb);
		PurgeComm(hCom,PURGE_TXCLEAR);
	}

	return true;
}

//以一个线程不同监控串口行接收的数据
DWORD WINAPI SerialPort1ThreadProcess( HWND hWnd//主窗口句柄
									  )
{
	
	char str[101];
	DWORD wCount; //读取的字节数
	while(1)
	{
		ReadFile(hCom,str, 100, &wCount, NULL);
		if(wCount > 0)//收到数据
		{
			str[wCount] = '\0';
			::PostMessage(hWnd, COM_RECVDATA, (unsigned int)str, wCount);	
		}
	}
	return TRUE;
}