hyperion.ng/libsrc/leddevice/ProviderRs232.cpp

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// STL includes
#include <cstring>
#include <iostream>
// Qt includes
#include <QTimer>
// Local Hyperion includes
#include "ProviderRs232.h"
ProviderRs232::ProviderRs232()
: _rs232Port(this)
, _blockedForDelay(false)
, _stateChanged(true)
, _bytesToWrite(0)
, _bytesWritten(0)
, _frameDropCounter(0)
, _lastError(QSerialPort::NoError)
, _timer()
{
// setup timer
_timer.setSingleShot(false);
_timer.setInterval(1000);
connect(&_timer, SIGNAL(timeout()), this, SLOT(rewriteLeds()));
// start the timer
_timer.start();
connect(&_rs232Port, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(error(QSerialPort::SerialPortError)));
connect(&_rs232Port, SIGNAL(bytesWritten(qint64)), this, SLOT(bytesWritten(qint64)));
connect(&_rs232Port, SIGNAL(readyRead()), this, SLOT(readyRead()));
}
bool ProviderRs232::init(const Json::Value &deviceConfig)
{
closeDevice();
_deviceName = deviceConfig["output"].asString();
_baudRate_Hz = deviceConfig["rate"].asInt();
_delayAfterConnect_ms = deviceConfig.get("delayAfterConnect",250).asInt();
_timer.setInterval ( deviceConfig.get("rewriteTime",5000).asInt() );
return true;
}
void ProviderRs232::bytesWritten(qint64 bytes)
{
_bytesWritten += bytes;
if (_bytesWritten >= _bytesToWrite)
{
_bytesToWrite = 0;
_blockedForDelay = false;
}
}
void ProviderRs232::readyRead()
{
QByteArray data = _rs232Port.readAll();
Debug(_log, "received %d bytes data", data.size());
}
void ProviderRs232::error(QSerialPort::SerialPortError error)
{
if ( error != QSerialPort::NoError )
{
if (_lastError != error)
{
_lastError = error;
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."); break;
case QSerialPort::FramingError:
Error(_log, "Framing error detected by the hardware while reading data."); break;
case QSerialPort::BreakConditionError:
Error(_log, "Break condition detected by the hardware on the input line."); 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();
closeDevice();
}
}
}
ProviderRs232::~ProviderRs232()
{
disconnect(&_rs232Port, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(error(QSerialPort::SerialPortError)));
closeDevice();
}
void ProviderRs232::closeDevice()
{
if (_rs232Port.isOpen())
{
_rs232Port.close();
Debug(_log,"Close UART: %s", _deviceName.c_str());
}
}
int ProviderRs232::open()
{
Info(_log, "Opening UART: %s", _deviceName.c_str());
_rs232Port.setPortName(_deviceName.c_str());
return tryOpen(_delayAfterConnect_ms) ? 0 : -1;
}
bool ProviderRs232::tryOpen(const int delayAfterConnect_ms)
{
if ( ! _rs232Port.isOpen() )
{
if ( ! _rs232Port.open(QIODevice::ReadWrite) )
{
if ( _stateChanged )
{
Error(_log, "Unable to open RS232 device (%s)", _deviceName.c_str());
_stateChanged = false;
}
return false;
}
Debug(_log, "Setting baud rate to %d", _baudRate_Hz);
_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 ProviderRs232::writeBytes(const qint64 size, const uint8_t * data)
{
// restart the timer
_timer.start();
if (! _blockedForDelay)
{
if (!_rs232Port.isOpen())
{
return tryOpen(5000) ? 0 : -1;
}
if (_frameDropCounter > 0)
{
Debug(_log, "%d frames dropped", _frameDropCounter);
}
_frameDropCounter = 0;
_blockedForDelay = true;
_bytesToWrite = size;
qint64 bytesWritten = _rs232Port.write(reinterpret_cast<const char*>(data), size);
if (bytesWritten == -1 || bytesWritten != size)
{
Warning(_log,"failed writing data");
QTimer::singleShot(500, this, SLOT(unblockAfterDelay()));
return -1;
}
QTimer::singleShot(5000, this, SLOT(unblockAfterDelay()));
}
else
{
_frameDropCounter++;
}
return 0;
}
void ProviderRs232::unblockAfterDelay()
{
_blockedForDelay = false;
}
int ProviderRs232::rewriteLeds()
{
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}