//---------------------------------------------------------------------------
//定義串口控制類
//作者：馮華亮
//最后修改日期：2002年5月
#ifndef ComH
#define ComH
//---------------------------------------------------------------------------
#include "ComThread.h"
//---------------------------------------------------------------------------
class TSerialPort
{
public:
	TSerialPort();	//構(gòu)造函數(shù)
	~TSerialPort();	//析構(gòu)函數(shù)
	//串口初始化,缺省參數(shù)為:COM1,19200Baud,無奇偶校驗(yàn),8數(shù)據(jù)為,1停止位,監(jiān)控讀事件
	bool InitPort(HWND Parent,unsigned uPortNo=1,unsigned uBaud=19200,
		char cParity='N',unsigned uDataBits=8,unsigned uStopBits=1,
		DWORD dwCommEvents=EV_RXCHAR);
	void __fastcall StartMonitoring();		//啟動(dòng)串口監(jiān)控線程
	void __fastcall StopMonitoring();		//掛起口監(jiān)控線程
	bool WriteToPort(unsigned char ucTxChar);	//向串口寫一個(gè)字符
private:
	void __fastcall Clear();  	//清除占用的資源

	HANDLE hComm;     		//串口句柄
	OVERLAPPED ov_Write;		//異步寫串口時(shí)用到的重疊結(jié)構(gòu)
	TComThread *ComThread;   	//串口操作線程
	DCB ComDCB;          		//串口設(shè)備控制塊
	COMMTIMEOUTS CommTimeouts;	//超時(shí)參數(shù)
};
//---------------------------------------------------------------------------
//全局變量
extern int g_iSerialPort;                 //端口號(hào):COM1,COM2,COM3,COM4
//---------------------------------------------------------------------------
//顯示出錯(cuò)原因
void __fastcall ProcessErrorMessage(char* ErrorText);
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#endif