scbc_repos/SATHelper/SATHelper/SynSerial.cpp

#include "StdAfx.h"
#include "SynSerial.h"

CSynSerial::CSynSerial(void) :m_hSerialPort(NULL)
, m_dwInQueue(1024)
, m_dwOutQueue(1024)
{
	memset(&m_dcb, 0, sizeof(DCB));
	memset(&m_cts, 0, sizeof(COMMTIMEOUTS));
	memset(&m_szSerialPort, 0, sizeof(TCHAR) * MAX_PORT_LEN);

	// 初始化重叠对象;
	ZeroMemory(&m_wrOverlapped, sizeof(m_wrOverlapped));
	if (m_wrOverlapped.hEvent != NULL) {
		ResetEvent(m_wrOverlapped.hEvent);
		m_wrOverlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
	}
}

CSynSerial::~CSynSerial(void)
{
	CloseSerialPort();
}

BOOL CSynSerial::OpenSerialPort(IN CONST BYTE& byCommPort, IN CONST DWORD& dwBaudRate, IN CONST BYTE& bySize, IN CONST BYTE& byParity, IN CONST BYTE& byStopBits, IN CONST BYTE& byStartAddr, IN CONST INT& nInterval)
{
	ASSERT(byCommPort);
	CloseSerialPort();

	_stprintf_s(m_szSerialPort, _T("\\\\.\\com%d"), (int)byCommPort);
	m_hSerialPort = CreateFile(m_szSerialPort, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
	if (m_hSerialPort == INVALID_HANDLE_VALUE) {
		// 打开串口失败;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	BOOL bResult = FALSE;
	// SetupComm设置缓冲区大小;
	bResult = SetupComm(m_hSerialPort, m_dwInQueue, m_dwOutQueue);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// 在串口读写之前,清除缓冲区;
	bResult = PurgeComm(m_hSerialPort, PURGE_TXCLEAR | PURGE_RXCLEAR);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// GetCommState获取设备控制块状态;
	memset(&m_dcb, 0, sizeof(DCB));
	bResult = GetCommState(m_hSerialPort, &m_dcb);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	m_dcb.Parity = byParity;
	if (m_dcb.Parity == NOPARITY)
		m_dcb.fParity = FALSE;
	else
		m_dcb.fParity = TRUE;

	m_dcb.BaudRate = dwBaudRate;
	m_dcb.ByteSize = bySize;
	m_dcb.StopBits = byStopBits;
	if (m_dcb.ByteSize == 8)
		m_dcb.StopBits = ONESTOPBIT;

	// SetCommState设置设备的控制块状态;
	memset(&m_cts, 0, sizeof(COMMTIMEOUTS));
	bResult = SetCommState(m_hSerialPort, &m_dcb);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// 获取设备的超时值;
	bResult = GetCommTimeouts(m_hSerialPort, &m_cts);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// 两字符之间最大的延时,设置0表示参数不起作用;
	m_cts.ReadIntervalTimeout = 50;
	m_cts.ReadTotalTimeoutMultiplier = 100;
	m_cts.ReadTotalTimeoutConstant = 8000;
	m_cts.WriteTotalTimeoutMultiplier = 100;
	m_cts.WriteTotalTimeoutConstant = 5000;

	// 设置设备的超时值;
	bResult = SetCommTimeouts(m_hSerialPort, &m_cts);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	return TRUE;
}

BOOL CSynSerial::ReOpenSerialPort()
{
	ASSERT(_tcslen(m_szSerialPort));
	CloseSerialPort();

	m_hSerialPort = CreateFile(m_szSerialPort, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
	if (m_hSerialPort == INVALID_HANDLE_VALUE) {
		// 打开串口失败;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	BOOL bResult = FALSE;
	// SetupComm设置缓冲区大小;
	bResult = SetupComm(m_hSerialPort, m_dwInQueue, m_dwOutQueue);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// 在串口读写之前,清除缓冲区;
	bResult = PurgeComm(m_hSerialPort, PURGE_TXCLEAR | PURGE_RXCLEAR);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// SetCommState设置设备的控制块状态;
	memset(&m_cts, 0, sizeof(COMMTIMEOUTS));
	bResult = SetCommState(m_hSerialPort, &m_dcb);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// 设置设备的超时值;
	bResult = SetCommTimeouts(m_hSerialPort, &m_cts);
	if (!bResult) {
		CloseHandle(m_hSerialPort);
		m_hSerialPort = INVALID_HANDLE_VALUE;
		DWORD dwError = GetLastError();
		return FALSE;
	}

	return TRUE;
}

void CSynSerial::CloseSerialPort()
{
	if (m_hSerialPort != NULL && m_hSerialPort != INVALID_HANDLE_VALUE)
		CloseHandle(m_hSerialPort);
	m_hSerialPort = INVALID_HANDLE_VALUE;
}

BOOL CSynSerial::SetSerialPort(IN CONST DWORD& dwBaudRate, IN CONST BYTE& byByteSize, IN CONST BYTE& byParity, IN CONST BYTE& byStopBits, IN CONST BYTE& byStartAddr, IN CONST DWORD& dwInQueue, IN CONST DWORD& dwOutQueue)
{
	if (!IsOpen())
		return FALSE;

	BOOL bResult = FALSE;
	// GetCommState获取设备控制块状态;
	memset(&m_dcb, 0, sizeof(DCB));
	bResult = GetCommState(m_hSerialPort, &m_dcb);
	if (!bResult) {
		DWORD dwError = GetLastError();
		return FALSE;
	}

	m_dcb.Parity = byParity;
	if (m_dcb.Parity == NOPARITY)
		m_dcb.fParity = FALSE;
	else
		m_dcb.fParity = TRUE;

	m_dcb.BaudRate = dwBaudRate;
	m_dcb.ByteSize = byByteSize;
	m_dcb.StopBits = byStopBits;
	if (m_dcb.ByteSize == 8)
		m_dcb.StopBits = ONESTOPBIT;

	// SetCommState设置设备的控制块状态;
	memset(&m_cts, 0, sizeof(COMMTIMEOUTS));
	bResult = SetCommState(m_hSerialPort, &m_dcb);
	if (!bResult) {
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// 获取设备的超时值;
	bResult = GetCommTimeouts(m_hSerialPort, &m_cts);
	if (!bResult) {
		DWORD dwError = GetLastError();
		return FALSE;
	}

	// 两字符之间最大的延时,设置0表示参数不起作用;
	m_cts.ReadIntervalTimeout = 50;
	m_cts.ReadTotalTimeoutMultiplier = 100;
	m_cts.ReadTotalTimeoutConstant = 8000;
	m_cts.WriteTotalTimeoutMultiplier = 100;
	m_cts.WriteTotalTimeoutConstant = 3000;

	// 设置设备的超时值;
	bResult = SetCommTimeouts(m_hSerialPort, &m_cts);
	if (!bResult) {
		DWORD dwError = GetLastError();
		return FALSE;
	}

	return TRUE;
}

void CSynSerial::SetSerialDCB(IN CONST DCB& dcb)
{
}

void CSynSerial::SetSerialCommTimeouts(IN CONST COMMTIMEOUTS& commTimeouts)
{
}

DWORD CSynSerial::WriteComm(IN BYTE* pWirteBuf, IN CONST INT32 nWriteSize)
{
	if (!IsOpen())
		return 0;

	if (pWirteBuf == NULL || !::AfxIsValidAddress(pWirteBuf, nWriteSize, FALSE))
	{
		return 0;
	}

	DWORD dwErrorFlags;
	DWORD dwBytesWritten = 0;	// 实际写入的字节数;
	// 写前, 清除错误;
	COMSTAT ComStat;
	ClearCommError(m_hSerialPort, &dwErrorFlags, &ComStat);
	// 写前,清空缓存区;
	PurgeComm(m_hSerialPort, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR);
	if (!WriteFile(m_hSerialPort, pWirteBuf, nWriteSize, &dwBytesWritten, &m_wrOverlapped)) {
		DWORD dwError = GetLastError();
		if (ERROR_IO_PENDING == GetLastError()) {
			while (!GetOverlappedResult(m_hSerialPort, &m_wrOverlapped, &dwBytesWritten, FALSE)) {
				dwError = GetLastError();
				if (ERROR_IO_PENDING == dwError || dwError == ERROR_IO_INCOMPLETE) {
					continue;
				}
				else {
					ClearCommError(m_hSerialPort, &dwError, NULL);
					break;
				}
			}
		}
	}

	// 返回写入字节数;
	return dwBytesWritten;
}

DWORD CSynSerial::ReadComm(IN BYTE* pReadBuf, IN CONST DWORD& dwReadSize, WORD timeout /* = 300 */)
{
	if (!IsOpen())
		return 0;

	if (pReadBuf == NULL || !::AfxIsValidAddress(pReadBuf, dwReadSize, FALSE))
	{
		return 0;
	}

	DWORD dwError = 0;
	DWORD dwRealRead;
	if (!ClearCommError(m_hSerialPort, &dwError, NULL)) {
		PurgeComm(m_hSerialPort, PURGE_TXABORT | PURGE_TXCLEAR);
	}

	if (!ReadFile(m_hSerialPort, pReadBuf, dwReadSize, &dwRealRead, &m_wrOverlapped)) {
		if (GetLastError() == ERROR_IO_PENDING) {
			while (!GetOverlappedResult(m_hSerialPort, &m_wrOverlapped, &dwRealRead, FALSE)) {
				dwError = GetLastError();
				printf("\t 码值=%d, 长度=%d, 内容=%s \n\n", dwError, dwRealRead, pReadBuf);
			}
		}
	}

	return dwRealRead;
}