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/**
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* This
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*
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*
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* @file
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* Copyright © Audi Electronics Venture GmbH. All rights reserved.
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*
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* $Author: ELAMIHA $
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* $Date: 2014-11-21 11:30:22 +0100 (Fri, 21 Nov 2014) $
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* $Revision: 1180 $
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*
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* @remarks
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*
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*/
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#include "stdafx.h"
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#ifdef NO_GLOBAL_WINDOWS_SDK_FROM_STDAFX
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#include "../library_includes_windows.h"
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#endif
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#ifndef WIN32
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#include <poll.h>
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#include <termios.h>
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#endif
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#include "a_utils_comm.h"
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#ifdef WIN32
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/*
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//open COM1 for read and write
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hPort=CreateFile( "COM1",
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GENERIC_READ | GENERIC_WRITE, //bidirectional
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0,
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NULL, //no security
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OPEN_EXISTING, //this must be set; the ports are already created
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FILE_ATTRIBUTE_NORMAL, // maybe with | FILE_FLAG_OVERLAPPED
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NULL );
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Standard ReadFile() and WriteFile() functions can then be used to read or write to the port.
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To set the port up reliably, COM port specific functions need to be used, so look up the online
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help for details on the following functions:
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GetCommModemStatus(), SetCommState(), SetCommMask(), SetupComm(),
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PurgeComm(), ClearCommError(), SetCommTimeouts() and EscapeCommFunction()
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Tips:-
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Even on Win9x, you can use overlapped IO with a com port
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The Signalled state of a port seems to indicates it is ready for reading or writing, even if you only opened the port unidirectionally.
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WaitCommEvent() lets you block waiting for something interesting to happen, such as data arriving or various lines (e.g. RI -Ring Indicator) toggling.
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On win98/NT5, RequestDeviceWakeup() may even let the external port wake up your app -especially if RI is used as the signal.
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*/
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namespace A_UTILS_NS
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{
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/**************************************/
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/* This still needs to be implemented.*/
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/**************************************/
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A_UTILS_P_DECLARE_PRE(cSerialDevice);
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cSerialDevice::cSerialDevice()
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{
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m_hDevice = NULL;
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}
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cSerialDevice::~cSerialDevice()
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{
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Close();
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}
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tResult cSerialDevice::Open(const tChar* strDeviceName, tInt nBaudRate, tInt nParity, tInt nDataBits,
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tInt nStopBits, tInt nRxQueue, tInt nTxQueue, tTimeStamp nReadTimeout)
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{
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RETURN_IF_POINTER_NULL(strDeviceName);
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if (nBaudRate < 0 ||
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nParity < 0 ||
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nDataBits < 0 ||
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nStopBits < 0 ||
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nRxQueue < 0 ||
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nTxQueue < 0 ||
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nReadTimeout < 0)
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{
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RETURN_ERROR(ERR_INVALID_ARG);
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}
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Close();
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BOOL bStatus = TRUE;
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m_hDevice = ::CreateFile(strDeviceName,
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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if (m_hDevice == NULL || m_hDevice == INVALID_HANDLE_VALUE)
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{
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DWORD dwError = cSystem::GetLastSystemError();
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RETURN_ERROR(ERR_OPEN_FAILED);
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}
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// get current config
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DCB sDevCtrl;
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sDevCtrl.DCBlength = sizeof(sDevCtrl);
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bStatus = ::GetCommState(m_hDevice, &sDevCtrl);
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if (bStatus == FALSE)
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{
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RETURN_ERROR(ERR_DEVICE_NOT_READY);
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}
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sDevCtrl.BaudRate = nBaudRate;
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switch (nParity)
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{
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case SER_EVENPARITY:
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sDevCtrl.Parity = EVENPARITY;
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break;
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case SER_MARKPARITY:
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sDevCtrl.Parity = MARKPARITY;
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break;
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case SER_NOPARITY:
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sDevCtrl.Parity = NOPARITY;
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break;
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case SER_ODDPARITY:
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sDevCtrl.Parity = ODDPARITY;
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break;
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case SER_SPACEPARITY:
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sDevCtrl.Parity = SPACEPARITY;
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break;
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default:
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RETURN_ERROR(ERR_INVALID_ARG);
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}
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switch (nStopBits)
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{
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case SER_ONESTOPBIT:
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sDevCtrl.StopBits = ONESTOPBIT;
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break;
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case SER_ONE5STOPBITS:
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sDevCtrl.StopBits = ONE5STOPBITS;
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break;
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case SER_TWOSTOPBITS:
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sDevCtrl.StopBits = TWOSTOPBITS;
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break;
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default:
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RETURN_ERROR(ERR_INVALID_ARG);
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}
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sDevCtrl.ByteSize = nDataBits;
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bStatus = ::SetCommState(m_hDevice, &sDevCtrl);
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if (bStatus == FALSE)
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{
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DWORD dwError = cSystem::GetLastSystemError();
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RETURN_ERROR(ERR_DEVICE_NOT_READY);
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}
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bStatus = ::SetupComm(m_hDevice, nRxQueue, nTxQueue);
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if (bStatus == FALSE)
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{
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DWORD dwError = cSystem::GetLastSystemError();
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RETURN_ERROR(ERR_DEVICE_NOT_READY);
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}
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COMMTIMEOUTS sCommTimeOuts;
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sCommTimeOuts.ReadIntervalTimeout = MAXDWORD;
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sCommTimeOuts.ReadTotalTimeoutMultiplier = MAXDWORD;
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sCommTimeOuts.ReadTotalTimeoutConstant = (DWORD)(nReadTimeout / 1000);
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sCommTimeOuts.WriteTotalTimeoutMultiplier = 0;
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sCommTimeOuts.WriteTotalTimeoutConstant = 5000;
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::SetCommTimeouts(m_hDevice, &sCommTimeOuts);
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RETURN_NOERROR;
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}
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tResult cSerialDevice::Close()
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{
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if (m_hDevice != NULL)
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{
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::CloseHandle(m_hDevice);
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m_hDevice = NULL;
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}
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RETURN_NOERROR;
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}
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tResult cSerialDevice::CheckForDevice(const tChar* strDeviceName)
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{
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HANDLE hDevice = ::CreateFile(strDeviceName,
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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if (hDevice != NULL)
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{
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::CloseHandle(hDevice);
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}
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if (hDevice == NULL || hDevice == INVALID_HANDLE_VALUE)
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{
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RETURN_ERROR(ERR_NOT_FOUND);
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}
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RETURN_NOERROR;
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}
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tUInt32 cSerialDevice::GetDeviceMask()
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{
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tUInt32 nMask = 0x0;
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for (tInt nDevNr=0; nDevNr<32; nDevNr++)
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{
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if (IS_OK(CheckForDevice("\\\\.\\COM" + cString::Format("%d", nDevNr+1))))
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{
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nMask |= (1 << nDevNr);
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}
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}
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return nMask;
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}
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tUInt32 cSerialDevice::GetUnusedDeviceMask()
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{
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tUInt32 nMask = GetDeviceMask();
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tHandle hDevice;
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for (tInt nDevNr=0; nDevNr<32; nDevNr++)
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{
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if ((nMask & (1 << nDevNr)) != 0)
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{
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hDevice = ::CreateFile(cString::Format("COM%d", nDevNr+1),
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL );
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if (hDevice == NULL || hDevice == INVALID_HANDLE_VALUE)
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{
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nMask &= (~(1 << nDevNr));
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}
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else
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{
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::CloseHandle(hDevice);
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}
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}
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}
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return nMask;
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}
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tResult cSerialDevice::FindUnusedDevice(cString& strDeviceName)
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{
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tUInt32 nMask = GetUnusedDeviceMask();
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if (nMask == 0x0)
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{
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strDeviceName.Clear();
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RETURN_ERROR(ERR_BAD_DEVICE);
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}
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tInt nDevNr = 0;
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for (nDevNr = 0; nDevNr<32; nDevNr++)
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{
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270
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if ((nMask & (1 << nDevNr)) != 0)
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{
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break;
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}
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274
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}
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275
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strDeviceName = cString::Format("COM%d", nDevNr+1);
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277
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278
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RETURN_NOERROR;
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}
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280
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281
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tInt32 cSerialDevice::Read(tVoid* pBuffer, tInt32 nBufferSize)
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282
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{
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283
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if (pBuffer == NULL)
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284
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{
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285
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return -1;
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286
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}
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287
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|
288
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tInt32 nReadCount = 0;
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289
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|
290
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#ifdef WIN32
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291
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|
292
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DWORD dwReadCount = 0;
|
293
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BOOL bStatus = ::ReadFile(m_hDevice, (BYTE*) pBuffer, nBufferSize, &dwReadCount, NULL);
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294
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if (bStatus)
|
295
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{
|
296
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nReadCount = (tInt32) dwReadCount;
|
297
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}
|
298
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else
|
299
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{
|
300
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nReadCount = -1;
|
301
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}
|
302
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303
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#else // WIN32
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304
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305
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nReadCount = -1;
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307
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#endif // WIN32
|
308
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|
309
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return nReadCount;
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310
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}
|
311
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|
312
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tInt32 cSerialDevice::Write(const tVoid* pBuffer, tInt32 nBufferSize)
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313
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{
|
314
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if (pBuffer == NULL)
|
315
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{
|
316
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return -1;
|
317
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}
|
318
|
|
319
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#ifdef WIN32
|
320
|
|
321
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DWORD dwWriteCount = 0;
|
322
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BOOL bStatus = ::WriteFile(m_hDevice,
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323
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pBuffer,
|
324
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nBufferSize,
|
325
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&dwWriteCount,
|
326
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NULL);
|
327
|
|
328
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if (!bStatus || dwWriteCount != nBufferSize)
|
329
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{
|
330
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return -1;
|
331
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}
|
332
|
|
333
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return (tInt32) dwWriteCount;
|
334
|
|
335
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#else // WIN32
|
336
|
|
337
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return -1;
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338
|
|
339
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#endif // WIN32
|
340
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}
|
341
|
|
342
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tBool cSerialDevice::IsConnected()
|
343
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{
|
344
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return (m_hDevice != NULL);
|
345
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}
|
346
|
|
347
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} // namespace A_UTILS_NS
|
348
|
|
349
|
|
350
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#else // WIN32
|
351
|
|
352
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namespace A_UTILS_NS
|
353
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{
|
354
|
|
355
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A_UTILS_P_DECLARE(cSerialDevice)
|
356
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{
|
357
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friend class cSerialDevice;
|
358
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public:
|
359
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pollfd m_sPoll;
|
360
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tInt m_nTimeoutMilli;
|
361
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};
|
362
|
|
363
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cSerialDevice::cSerialDevice():
|
364
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m_nDev(-1)
|
365
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{
|
366
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A_UTILS_D_CREATE(cSerialDevice);
|
367
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}
|
368
|
|
369
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cSerialDevice::~ cSerialDevice()
|
370
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{
|
371
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Close();
|
372
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}
|
373
|
|
374
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#define BAUDCASE(rate) case rate: nBaudSetting = B##rate; break;
|
375
|
|
376
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tResult cSerialDevice::Open(const tChar * strDeviceName,
|
377
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tInt nBaudRate,
|
378
|
tInt nParity,
|
379
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tInt nDataBits,
|
380
|
tInt nStopBits,
|
381
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tInt nRxQueue,
|
382
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tInt nTxQueue,
|
383
|
tTimeStamp nReadTimeout)
|
384
|
{
|
385
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RETURN_IF_POINTER_NULL(strDeviceName);
|
386
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if (nBaudRate < 0 ||
|
387
|
nParity < 0 ||
|
388
|
nDataBits < 0 ||
|
389
|
nStopBits < 0 ||
|
390
|
nRxQueue < 0 ||
|
391
|
nTxQueue < 0 ||
|
392
|
nReadTimeout < 0)
|
393
|
{
|
394
|
RETURN_ERROR(ERR_INVALID_ARG);
|
395
|
}
|
396
|
|
397
|
m_nDev = open(strDeviceName, O_RDWR|O_NOCTTY);
|
398
|
if (m_nDev < 0)
|
399
|
{
|
400
|
RETURN_ERROR(ERR_OPEN_FAILED);
|
401
|
}
|
402
|
|
403
|
|
404
|
// please see http://www.easysw.com/~mike/serial/serial.html
|
405
|
// for an in-depth description of the following options.
|
406
|
struct termios sOptions;
|
407
|
|
408
|
if (tcgetattr(m_nDev, &sOptions) < 0)
|
409
|
{
|
410
|
Close();
|
411
|
LOG_ERROR(cString::Format("Unable to get serial device options: %s", strerror(errno)));
|
412
|
RETURN_ERROR(ERR_DEVICE_IO);
|
413
|
}
|
414
|
|
415
|
// set baud-rate
|
416
|
tInt nBaudSetting = 0;
|
417
|
switch (nBaudRate)
|
418
|
{
|
419
|
BAUDCASE(0)
|
420
|
BAUDCASE(50)
|
421
|
BAUDCASE(75)
|
422
|
BAUDCASE(110)
|
423
|
BAUDCASE(134)
|
424
|
BAUDCASE(150)
|
425
|
BAUDCASE(300)
|
426
|
BAUDCASE(600)
|
427
|
BAUDCASE(1200)
|
428
|
BAUDCASE(1800)
|
429
|
BAUDCASE(2400)
|
430
|
BAUDCASE(4800)
|
431
|
BAUDCASE(9600)
|
432
|
BAUDCASE(19200)
|
433
|
BAUDCASE(38400)
|
434
|
BAUDCASE(57600)
|
435
|
//BAUDCASE(76800)
|
436
|
BAUDCASE(115200)
|
437
|
BAUDCASE(230400 )
|
438
|
#ifndef __APPLE__
|
439
|
BAUDCASE(460800)
|
440
|
BAUDCASE(500000)
|
441
|
BAUDCASE(576000)
|
442
|
BAUDCASE(921600)
|
443
|
BAUDCASE(1000000)
|
444
|
BAUDCASE(1152000)
|
445
|
BAUDCASE(1500000)
|
446
|
BAUDCASE(2000000)
|
447
|
BAUDCASE(2500000)
|
448
|
BAUDCASE(3000000)
|
449
|
BAUDCASE(3500000)
|
450
|
BAUDCASE(4000000)
|
451
|
#endif //__APPLE__
|
452
|
default:
|
453
|
RETURN_ERROR(ERR_NOT_SUPPORTED);
|
454
|
}
|
455
|
|
456
|
cfsetispeed(&sOptions, nBaudSetting);
|
457
|
cfsetospeed(&sOptions, nBaudSetting);
|
458
|
|
459
|
sOptions.c_cflag |= (CLOCAL | CREAD);
|
460
|
|
461
|
// set parity
|
462
|
switch (nParity)
|
463
|
{
|
464
|
case SER_EVENPARITY:
|
465
|
sOptions.c_cflag |= PARENB;
|
466
|
sOptions.c_cflag &= ~PARODD;
|
467
|
sOptions.c_cflag &= ~CSTOPB;
|
468
|
sOptions.c_cflag &= ~CSIZE;
|
469
|
sOptions.c_cflag |= CS7;
|
470
|
break;
|
471
|
case SER_MARKPARITY:
|
472
|
RETURN_ERROR(ERR_NOT_SUPPORTED);
|
473
|
break;
|
474
|
case SER_NOPARITY:
|
475
|
sOptions.c_cflag &= ~PARENB;
|
476
|
sOptions.c_cflag &= ~CSTOPB;
|
477
|
sOptions.c_cflag &= ~CSIZE;
|
478
|
sOptions.c_cflag |= CS8;
|
479
|
break;
|
480
|
case SER_ODDPARITY:
|
481
|
sOptions.c_cflag |= PARENB;
|
482
|
sOptions.c_cflag |= PARODD;
|
483
|
sOptions.c_cflag &= ~CSTOPB;
|
484
|
sOptions.c_cflag &= ~CSIZE;
|
485
|
sOptions.c_cflag |= CS7;
|
486
|
break;
|
487
|
case SER_SPACEPARITY:
|
488
|
RETURN_ERROR(ERR_NOT_SUPPORTED);
|
489
|
default:
|
490
|
RETURN_ERROR(ERR_INVALID_ARG);
|
491
|
}
|
492
|
|
493
|
// set data size
|
494
|
sOptions.c_cflag &= ~CSIZE;
|
495
|
switch (nDataBits)
|
496
|
{
|
497
|
case 5:
|
498
|
sOptions.c_cflag |= CS5;
|
499
|
break;
|
500
|
case 6:
|
501
|
sOptions.c_cflag |= CS6;
|
502
|
break;
|
503
|
case 7:
|
504
|
sOptions.c_cflag |= CS7;
|
505
|
break;
|
506
|
case 8:
|
507
|
sOptions.c_cflag |= CS8;
|
508
|
break;
|
509
|
default:
|
510
|
RETURN_ERROR(ERR_INVALID_ARG);
|
511
|
}
|
512
|
|
513
|
// set stop bits
|
514
|
switch (nStopBits)
|
515
|
{
|
516
|
case SER_ONESTOPBIT:
|
517
|
sOptions.c_cflag &= ~CSTOPB;
|
518
|
break;
|
519
|
case SER_ONE5STOPBITS:
|
520
|
RETURN_ERROR(ERR_NOT_SUPPORTED);
|
521
|
break;
|
522
|
case SER_TWOSTOPBITS:
|
523
|
sOptions.c_cflag |= CSTOPB;
|
524
|
break;
|
525
|
default:
|
526
|
RETURN_ERROR(ERR_INVALID_ARG);
|
527
|
}
|
528
|
|
529
|
// use raw mode
|
530
|
sOptions.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
|
531
|
sOptions.c_oflag &= ~OPOST;
|
532
|
#ifdef IUCLC
|
533
|
sOptions.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
|
534
|
INLCR | IGNCR | ICRNL | IXON | IXOFF | IUCLC | IXANY |
|
535
|
IMAXBEL | ISIG);
|
536
|
#else
|
537
|
sOptions.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
|
538
|
INLCR | IGNCR | ICRNL | IXON | IXOFF | IXANY |
|
539
|
IMAXBEL | ISIG);
|
540
|
#endif //IUCLC
|
541
|
|
542
|
//set timeout
|
543
|
sOptions.c_cc[VMIN] = 0;
|
544
|
sOptions.c_cc[VTIME] = nReadTimeout / 100000;
|
545
|
|
546
|
//Set the new options for the port...
|
547
|
if (tcsetattr(m_nDev, TCSANOW, &sOptions) < 0)
|
548
|
{
|
549
|
Close();
|
550
|
LOG_ERROR(cString::Format("Unable to set serial device options: %s", strerror(errno)));
|
551
|
RETURN_ERROR(ERR_DEVICE_IO);
|
552
|
}
|
553
|
|
554
|
_d->m_sPoll.fd = m_nDev;
|
555
|
_d->m_sPoll.events = POLLIN;
|
556
|
_d->m_nTimeoutMilli = nReadTimeout / 1000;
|
557
|
|
558
|
RETURN_NOERROR;
|
559
|
}
|
560
|
|
561
|
tResult cSerialDevice::Close()
|
562
|
{
|
563
|
if (IsConnected())
|
564
|
{
|
565
|
close(m_nDev);
|
566
|
m_nDev = -1;
|
567
|
}
|
568
|
|
569
|
RETURN_NOERROR;
|
570
|
}
|
571
|
|
572
|
tInt32 cSerialDevice::Read(tVoid * pBuffer, tInt32 nBufferSize)
|
573
|
{
|
574
|
if (m_nDev == -1)
|
575
|
{
|
576
|
return -1;
|
577
|
}
|
578
|
|
579
|
if (_d->m_nTimeoutMilli)
|
580
|
{
|
581
|
if (0 == poll(&_d->m_sPoll, 1, _d->m_nTimeoutMilli))
|
582
|
{
|
583
|
// timeout
|
584
|
return 0;
|
585
|
}
|
586
|
}
|
587
|
|
588
|
return read(m_nDev, pBuffer, nBufferSize);;
|
589
|
}
|
590
|
|
591
|
tInt32 cSerialDevice::Write(const tVoid * pBuffer, tInt32 nBufferSize)
|
592
|
{
|
593
|
return write(m_nDev, pBuffer, nBufferSize);
|
594
|
}
|
595
|
|
596
|
tBool cSerialDevice::IsConnected()
|
597
|
{
|
598
|
return m_nDev != -1;
|
599
|
}
|
600
|
|
601
|
tResult cSerialDevice::CheckForDevice(const tChar* strDeviceName)
|
602
|
{
|
603
|
if (cFileSystem::Exists(strDeviceName))
|
604
|
{
|
605
|
RETURN_NOERROR;
|
606
|
}
|
607
|
|
608
|
RETURN_ERROR(ERR_NOT_FOUND);
|
609
|
}
|
610
|
|
611
|
tUInt32 cSerialDevice::GetDeviceMask()
|
612
|
{
|
613
|
return 0;
|
614
|
}
|
615
|
|
616
|
tUInt32 cSerialDevice::GetUnusedDeviceMask()
|
617
|
{
|
618
|
return 0;
|
619
|
}
|
620
|
|
621
|
|
622
|
tResult cSerialDevice::FindUnusedDevice(cString& strDeviceName)
|
623
|
{
|
624
|
RETURN_ERROR(ERR_NOT_SUPPORTED);
|
625
|
}
|
626
|
|
627
|
}
|
628
|
#endif
|
629
|
|
630
|
|
631
|
tResult A_UTILS_NS::cSerialDevice::WriteByteByByte(const cString &strCmd)
|
632
|
{
|
633
|
char acSign[1];
|
634
|
for (tInt32 nChar=0; nChar < strCmd.GetLength(); nChar++)
|
635
|
{
|
636
|
acSign[0] = strCmd.GetAt(nChar);
|
637
|
if (Write(acSign, 1) != 1)
|
638
|
{
|
639
|
RETURN_ERROR(ERR_FAILED);
|
640
|
}
|
641
|
cSystem::Sleep(50);
|
642
|
}
|
643
|
RETURN_NOERROR;
|
644
|
}
|