hyperion.ng/libsrc/leddevice/LedRs232Device.cpp

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// STL includes
#include <cstring>
#include <iostream>
// Qt includes
#include <QTimer>
// Local Hyperion includes
#include "LedRs232Device.h"
LedRs232Device::LedRs232Device(const std::string& outputDevice, const unsigned baudrate, int delayAfterConnect_ms)
: _deviceName(outputDevice)
, _baudRate_Hz(baudrate)
, _delayAfterConnect_ms(delayAfterConnect_ms)
, _rs232Port(this)
, _blockedForDelay(false)
, _stateChanged(true)
{
connect(&_rs232Port, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(error(QSerialPort::SerialPortError)));
}
void LedRs232Device::error(QSerialPort::SerialPortError error)
{
if ( error != QSerialPort::NoError )
{
switch (error)
{
case QSerialPort::DeviceNotFoundError:
Error(_log, "An error occurred while attempting to open an non-existing device."); break;
case QSerialPort::PermissionError:
Error(_log, "An error occurred while attempting to open an already opened device by another process or a user not having enough permission and credentials to open."); break;
case QSerialPort::OpenError:
Error(_log, "An error occurred while attempting to open an already opened device in this object."); break;
case QSerialPort::NotOpenError:
Error(_log, "This error occurs when an operation is executed that can only be successfully performed if the device is open."); break;
case QSerialPort::ParityError:
Error(_log, "Parity error detected by the hardware while reading data. This value is obsolete. We strongly advise against using it in new code."); break;
case QSerialPort::FramingError:
Error(_log, "Framing error detected by the hardware while reading data. This value is obsolete. We strongly advise against using it in new code."); break;
case QSerialPort::BreakConditionError:
Error(_log, "Break condition detected by the hardware on the input line. This value is obsolete. We strongly advise against using it in new code."); break;
case QSerialPort::WriteError:
Error(_log, "An I/O error occurred while writing the data."); break;
case QSerialPort::ReadError:
Error(_log, "An I/O error occurred while reading the data."); break;
case QSerialPort::ResourceError:
Error(_log, "An I/O error occurred when a resource becomes unavailable, e.g. when the device is unexpectedly removed from the system."); break;
case QSerialPort::UnsupportedOperationError:
Error(_log, "The requested device operation is not supported or prohibited by the running operating system."); break;
case QSerialPort::TimeoutError:
Error(_log, "A timeout error occurred."); break;
default: Error(_log,"An unidentified error occurred. (%d)", error);
}
_rs232Port.clearError();
}
}
LedRs232Device::~LedRs232Device()
{
disconnect(&_rs232Port, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(error(QSerialPort::SerialPortError)));
if (_rs232Port.isOpen())
{
_rs232Port.close();
Debug(_log,"Close UART: %s", _deviceName.c_str());
}
}
int LedRs232Device::open()
{
Info(_log, "Opening UART: %s", _deviceName.c_str());
_rs232Port.setPortName(_deviceName.c_str());
return tryOpen() ? 0 : -1;
}
bool LedRs232Device::tryOpen()
{
if ( ! _rs232Port.isOpen() )
{
if ( ! _rs232Port.open(QIODevice::WriteOnly) )
{
if ( _stateChanged )
{
Error(_log, "Unable to open RS232 device (%s)", _deviceName.c_str());
_stateChanged = false;
}
return false;
}
_rs232Port.setBaudRate(_baudRate_Hz);
_stateChanged = true;
}
if (_delayAfterConnect_ms > 0)
{
_blockedForDelay = true;
QTimer::singleShot(_delayAfterConnect_ms, this, SLOT(unblockAfterDelay()));
Debug(_log, "Device blocked for %d ms", _delayAfterConnect_ms);
}
return _rs232Port.isOpen();
}
int LedRs232Device::writeBytes(const unsigned size, const uint8_t * data)
{
if (_blockedForDelay)
{
return 0;
}
if (!_rs232Port.isOpen())
{
_delayAfterConnect_ms = 3000;
return tryOpen() ? 0 : -1;
}
_rs232Port.flush();
qint64 result = _rs232Port.write(reinterpret_cast<const char*>(data), size);
if ( result < 0 || result != size)
{
return -1;
}
Debug(_log, "write %d ", result);
_rs232Port.flush();
return 0;
}
void LedRs232Device::unblockAfterDelay()
{
Debug(_log, "Device unblocked");
_blockedForDelay = false;
}