?? cn_com.txt
字號:
/*
Comm Base Library(WIN98/NT/2000) ver 1.1
Compile by： BC++ 5; C++ BUILDER 4, 5, 6, X; VC++ 5, 6; VC.NET; GCC;
copyright(c) 2004.5 - 2005.8 llbird wushaojian@21cn.com
*/
#ifndef _CN_COMM_H_
#define _CN_COMM_H_
#pragma warning(disable: 4530)
#pragma warning(disable: 4786)
#pragma warning(disable: 4800)
#include <assert.h>
#include <stdio.h>
#include <windows.h>
//送到窗口的消息 WPARAM 端口號
#define ON_COM_RECEIVE WM_USER + 618
#define ON_COM_CTS WM_USER + 619 //LPARAM 1 valid
#define ON_COM_DSR WM_USER + 621 //LPARAM 1 valid
#define ON_COM_RING WM_USER + 623
#define ON_COM_RLSD WM_USER + 624
#define ON_COM_BREAK WM_USER + 625
#define ON_COM_TXEMPTY WM_USER + 626
#define ON_COM_ERROR WM_USER + 627 //LPARAM save Error ID
#define DEFAULT_COM_MASK_EVENT EV_RXCHAR | EV_ERR | EV_CTS | EV_DSR | EV_BREAK | EV_TXEMPTY | EV_RING | EV_RLSD
class cnComm
{
public:
//------------------------------Construction-----------------------------------
//第1個參數為是否在打開串口時啟動監視線程， 第2個參數為IO方式 阻塞方式（0）/ 異步重疊方式（默認）
cnComm(bool fAutoBeginThread = true, DWORD dwIOMode =
FILE_FLAG_OVERLAPPED): _dwIOMode(dwIOMode), _fAutoBeginThread(fAutoBeginThread)
{
Init();
}
virtual ~cnComm()
{
Close();
UnInit();
}
//----------------------------------Attributes----------------------------------
//判斷串口是否打開
inline bool IsOpen()
{
return _hCommHandle != INVALID_HANDLE_VALUE;
}
//判斷串口是否打開
operator bool()
{
return _hCommHandle != INVALID_HANDLE_VALUE;
}
//獲得串口句炳
inline HANDLE GetHandle()
{
return _hCommHandle;
}
//獲得串口句炳
operator HANDLE()
{
return _hCommHandle;
}
//獲得串口參數 DCB
DCB *GetState()
{
return IsOpen() && ::GetCommState(_hCommHandle, &_DCB) == TRUE ?
&_DCB: NULL;
}
//設置串口參數 DCB
bool SetState(DCB *pdcb = NULL)
{
return IsOpen() ? ::SetCommState(_hCommHandle, pdcb == NULL ? &_DCB:pdcb) == TRUE: false;
}
//設置串口參數：波特率，停止位，等 支持設置字符串 "9600, 8, n, 1"
bool SetState(char *szSetStr)
{
if (IsOpen())
{
if (::GetCommState(_hCommHandle, &_DCB) != TRUE)
return false;
if (::BuildCommDCB(szSetStr, &_DCB) != TRUE)
return false;
return ::SetCommState(_hCommHandle, &_DCB) == TRUE;
}
return false;
}
//設置串口參數：波特率，停止位，等
bool SetState(DWORD dwBaudRate, DWORD dwByteSize = 8, DWORD dwParity =
NOPARITY, DWORD dwStopBits = ONESTOPBIT)
{
if (IsOpen())
{
if (::GetCommState(_hCommHandle, &_DCB) != TRUE)
return false;
_DCB.BaudRate = dwBaudRate;
_DCB.ByteSize = (unsigned char)dwByteSize;
_DCB.Parity = (unsigned char)dwParity;
_DCB.StopBits = (unsigned char)dwStopBits;
return ::SetCommState(_hCommHandle, &_DCB) == TRUE;
}
return false;
}
//獲得超時結構
LPCOMMTIMEOUTS GetTimeouts(void)
{
return IsOpen() && ::GetCommTimeouts(_hCommHandle, &_CO) == TRUE ?
&_CO: NULL;
}
//設置超時
bool SetTimeouts(LPCOMMTIMEOUTS lpCO)
{
return IsOpen() ? ::SetCommTimeouts(_hCommHandle, lpCO) == TRUE:false;
}
//設置串口的I/O緩沖區大小
bool SetBufferSize(DWORD dwInputSize, DWORD dwOutputSize)
{
return IsOpen() ? ::SetupComm(_hCommHandle, dwInputSize, dwOutputSize)== TRUE: false;
}
//關聯消息的窗口句柄
inline void SetWnd(HWND hWnd)
{
assert(::IsWindow(hWnd));
_hNotifyWnd = hWnd;
}
//設定發送通知, 接受字符最小值
inline void SetNotifyNum(DWORD dwNum)
{
_dwNotifyNum = dwNum;
}
//線程是否運行
inline bool IsThreadRunning()
{
return _hThreadHandle != NULL;
}
//獲得線程句柄
inline HANDLE GetThread()
{
return _hThreadHandle;
}
//設置要監視的事件， 打開前設置有效
void SetMaskEvent(DWORD dwEvent = DEFAULT_COM_MASK_EVENT)
{
_dwMaskEvent = dwEvent;
}
//獲得讀緩沖區的字符數
int GetInputSize()
{
COMSTAT Stat;
DWORD dwError;
return ::ClearCommError(_hCommHandle, &dwError, &Stat) == TRUE ? Stat.cbInQue : (DWORD) - 1L;
}
//----------------------------------Operations----------------------------------
//打開串口 缺省 9600, 8, n, 1
bool Open(DWORD dwPort)
{
return Open(dwPort, 9600);
}
//打開串口 缺省 baud_rate, 8, n, 1
bool Open(DWORD dwPort, DWORD dwBaudRate)
{
if (dwPort < 1 || dwPort > 1024)
return false;
BindCommPort(dwPort);
if (!OpenCommPort())
return false;
if (!SetupPort())
return false;
return SetState(dwBaudRate);
}
//打開串口, 使用類似"9600, 8, n, 1"的設置字符串設置串口
bool Open(DWORD dwPort, char *szSetStr)
{
if (dwPort < 1 || dwPort > 1024)
return false;
BindCommPort(dwPort);
if (!OpenCommPort())
return false;
if (!SetupPort())
return false;
return SetState(szSetStr);
}
//讀取串口 dwBufferLength個字符到 Buffer 返回實際讀到的字符數 可讀任意數據
DWORD Read(LPVOID Buffer, DWORD dwBufferLength, DWORD dwWaitTime = 10)
{
if (!IsOpen())
return 0;
COMSTAT Stat;
DWORD dwError;
if (::ClearCommError(_hCommHandle, &dwError, &Stat) && dwError > 0)
{
::PurgeComm(_hCommHandle,PURGE_RXABORT | PURGE_RXCLEAR);
return 0;
}
if (!Stat.cbInQue)
// 緩沖區無數據
return 0;
unsigned long uReadLength = 0;
dwBufferLength = dwBufferLength > Stat.cbInQue ? Stat.cbInQue :dwBufferLength;
if (!::ReadFile(_hCommHandle, Buffer, dwBufferLength, &uReadLength,&_ReadOverlapped))
{
if (::GetLastError() == ERROR_IO_PENDING)
{
WaitForSingleObject(_ReadOverlapped.hEvent, dwWaitTime);
// 結束異步I/O
if (!::GetOverlappedResult(_hCommHandle, &_ReadOverlapped,&uReadLength, false))
{
if (::GetLastError() != ERROR_IO_INCOMPLETE)
uReadLength = 0;
}
}
else
uReadLength = 0;
}
return uReadLength;
}
//讀取串口 dwBufferLength - 1 個字符到 szBuffer 返回ANSI C 模式字符串指針 適合一般字符通訊
char *ReadString(char *szBuffer, DWORD dwBufferLength, DWORD dwWaitTime =20)
{
unsigned long uReadLength = Read(szBuffer, dwBufferLength - 1,dwWaitTime);
szBuffer[uReadLength] = '\0';
return szBuffer;
}
//寫串口 可寫任意數據 "abcd" or "\x0\x1\x2"
DWORD Write(LPVOID Buffer, DWORD dwBufferLength)
{
if (!IsOpen())
return 0;
DWORD dwError;
if (::ClearCommError(_hCommHandle, &dwError, NULL) && dwError > 0)
::PurgeComm(_hCommHandle, PURGE_TXABORT | PURGE_TXCLEAR);
unsigned long uWriteLength = 0;
if (!::WriteFile(_hCommHandle, Buffer, dwBufferLength, &uWriteLength,&_WriteOverlapped))
if (::GetLastError() != ERROR_IO_PENDING)
uWriteLength = 0;
return uWriteLength;
}
//寫串口 寫ANSI C 模式字符串指針
DWORD Write(const char *szBuffer)
{
assert(szBuffer);
return Write((void*)szBuffer, strlen(szBuffer));
}
//讀串口 同步應用
DWORD ReadSync(LPVOID Buffer, DWORD dwBufferLength)
{
if (!IsOpen())
return 0;
DWORD dwError;
if (::ClearCommError(_hCommHandle, &dwError, NULL) && dwError > 0)
{
::PurgeComm(_hCommHandle,PURGE_RXABORT | PURGE_RXCLEAR);
return 0;
}
DWORD uReadLength = 0;
::ReadFile(_hCommHandle, Buffer, dwBufferLength, &uReadLength, NULL);
return uReadLength;
}
//寫串口 同步應用
DWORD WriteSync(LPVOID Buffer, DWORD dwBufferLength)
{
if (!IsOpen())
return 0;
DWORD dwError;
if (::ClearCommError(_hCommHandle, &dwError, NULL) && dwError > 0)
::PurgeComm(_hCommHandle, PURGE_TXABORT | PURGE_TXCLEAR);
unsigned long uWriteLength = 0;
::WriteFile(_hCommHandle, Buffer, dwBufferLength, &uWriteLength, NULL);
return uWriteLength;
}
//寫串口 szBuffer 可以輸出格式字符串 包含緩沖區長度
DWORD Write(char *szBuffer, DWORD dwBufferLength, char *szFormat, ...)
{
if (!IsOpen())
return 0;
va_list va;
va_start(va, szFormat);
_vsnprintf(szBuffer, dwBufferLength, szFormat, va);
va_end(va);
return Write(szBuffer);
}
//寫串口 szBuffer 可以輸出格式字符串 不檢查緩沖區長度 小心溢出
DWORD Write(char *szBuffer, char *szFormat, ...)
{
if (!IsOpen())
return 0;
va_list va;
va_start(va, szFormat);
vsprintf(szBuffer, szFormat, va);
va_end(va);
return Write(szBuffer);
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