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serialport-win32.cpp
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serialport-win32.cpp
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/*
* serialport-win32.cpp
*
* Copyright 2015 Joseph Zatarski
* Copyright 2016, 2017 TheMontezuma
*
* This file is copyrighted by either Fatih Aygun, Ray Ataergin, or both.
* However, the years for these copyrights are unfortunately unknown. If you
* know the specific year(s) please let the current maintainer know.
*/
#include "serialport.h"
#include <windows.h>
#include <string.h>
#include "sioworker.h"
#include "respeqtsettings.h"
#include <QTime>
#include <QtDebug>
/*********/
AbstractSerialPortBackend::AbstractSerialPortBackend(QObject *parent)
: QObject(parent)
{
}
AbstractSerialPortBackend::~AbstractSerialPortBackend()
{
}
StandardSerialPortBackend::StandardSerialPortBackend(QObject *parent)
: AbstractSerialPortBackend(parent)
{
mHandle = INVALID_HANDLE_VALUE;
}
StandardSerialPortBackend::~StandardSerialPortBackend()
{
if (isOpen()) {
close();
}
}
QString StandardSerialPortBackend::defaultPortName()
{
return QString("COM1");
}
bool StandardSerialPortBackend::open()
{
Sleep(250); //
if (isOpen()) {
close();
}
// qDebug() << "!d" << tr("DBG -- Serial Port Open...");
QString name(SERIAL_PORT_LOCATION);
name.append(respeqtSettings->serialPortName());
mMethod = respeqtSettings->serialPortHandshakingMethod();
mWriteDelay = SLEEP_FACTOR * respeqtSettings->serialPortWriteDelay();
mCompErrDelay = respeqtSettings->serialPortCompErrDelay();
if(mMethod==HANDSHAKE_SOFTWARE)
{
mHandle = (CreateFile(
(WCHAR*)name.utf16(),
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
0,
0
));
if (mHandle == INVALID_HANDLE_VALUE) {
qCritical() << "!e" << tr("Cannot open serial port '%1': %2").arg(respeqtSettings->serialPortName(), lastErrorMessage());
return false;
}
}
else
{
mHandle = (CreateFile(
(WCHAR*)name.utf16(),
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
0
));
if (mHandle == INVALID_HANDLE_VALUE) {
qCritical() << "!e" << tr("Cannot open serial port '%1': %2").arg(respeqtSettings->serialPortName(), lastErrorMessage());
return false;
}
if (!EscapeCommFunction(mHandle, SETDTR)) {
qCritical() << "!e" << tr("Cannot set DTR line in serial port '%1': %2").arg(respeqtSettings->serialPortName(), lastErrorMessage());
return false;
}
if (!EscapeCommFunction(mHandle, SETRTS)) {
qCritical() << "!e" << tr("Cannot set RTS line in serial port '%1': %2").arg(respeqtSettings->serialPortName(), lastErrorMessage());
return false;
}
}
mCanceled = false;
mCancelHandle = CreateEvent(0, true, false, 0);
if (!setNormalSpeed()) {
close();
return false;
}
QString m;
switch (mMethod) {
case HANDSHAKE_RI:
m = "RI";
break;
case HANDSHAKE_DSR:
m = "DSR";
break;
case HANDSHAKE_CTS:
m = "CTS";
break;
case HANDSHAKE_NO_HANDSHAKE:
m = "NO";
break;
case HANDSHAKE_SOFTWARE:
default:
m = "SOFTWARE (SIO2BT)";
break;
}
/* Notify the user that emulation is started */
qWarning() << "!i" << tr("Emulation started through standard serial port backend on '%1' with %2 handshaking")
.arg(respeqtSettings->serialPortName())
.arg(m);
return true;
}
bool StandardSerialPortBackend::isOpen()
{
return mHandle != INVALID_HANDLE_VALUE;
}
void StandardSerialPortBackend::close()
{
// qDebug() << "!d" << tr("DBG -- Serial Port Close...");
cancel();
if (!CloseHandle(mHandle)) {
qCritical() << "!e" << tr("Cannot close serial port: %1").arg(lastErrorMessage());
}
CloseHandle(mCancelHandle);
mCancelHandle = mHandle = INVALID_HANDLE_VALUE;
}
void StandardSerialPortBackend::cancel()
{
mCanceled = true;
SetEvent(mCancelHandle);
}
int StandardSerialPortBackend::speedByte()
{
// qDebug() << "!d" << tr("DBG -- Serial Port speedByte...");
if (respeqtSettings->serialPortHandshakingMethod()==HANDSHAKE_SOFTWARE) {
return 0x28; // standard speed (19200)
} else if (respeqtSettings->serialPortUsePokeyDivisors()) {
return respeqtSettings->serialPortPokeyDivisor();
} else {
int speed = 0x08;
switch (respeqtSettings->serialPortMaximumSpeed()) {
case 0:
speed = 0x28;
break;
case 1:
speed = 0x10;
break;
case 2:
speed = 0x08;
break;
}
return speed;
}
}
bool StandardSerialPortBackend::setNormalSpeed()
{
mHighSpeed = false;
return setSpeed(19200);
}
bool StandardSerialPortBackend::setHighSpeed()
{
mHighSpeed = true;
if (respeqtSettings->serialPortUsePokeyDivisors()) {
return setSpeed(divisorToBaud(respeqtSettings->serialPortPokeyDivisor()));
} else {
int speed = 57600;
switch (respeqtSettings->serialPortMaximumSpeed()) {
case 0:
speed = 19200;
break;
case 1:
speed = 38400;
break;
case 2:
speed = 57600;
break;
}
return setSpeed(speed);
}
}
bool StandardSerialPortBackend::setSpeed(int speed)
{
// qDebug() << "!d" << tr("DBG -- Serial Port setSpeed...");
DCB dcb;
COMMTIMEOUTS to;
/* Adjust parameters */
dcb.DCBlength = sizeof dcb;
dcb.BaudRate = speed;
dcb.fBinary = TRUE;
dcb.fParity = FALSE;
dcb.fOutxCtsFlow = FALSE;
dcb.fOutxDsrFlow = FALSE;
dcb.fDtrControl = DTR_CONTROL_ENABLE;
dcb.fDsrSensitivity = FALSE;
dcb.fTXContinueOnXoff = FALSE;
dcb.fOutX = FALSE;
dcb.fInX = FALSE;
dcb.fErrorChar = FALSE;
dcb.fNull = FALSE;
dcb.fRtsControl = RTS_CONTROL_ENABLE;
dcb.fAbortOnError = FALSE;
dcb.fDummy2 = 0;
dcb.wReserved = 0;
dcb.XonLim = 0;
dcb.XoffLim = 0;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
/* if (speed > 100000) {
dcb.StopBits = TWOSTOPBITS;
} else*/ {
dcb.StopBits = ONESTOPBIT;
}
dcb.XonChar = 0;
dcb.XoffChar = 0;
dcb.ErrorChar = 0;
dcb.EofChar = 0;
dcb.EvtChar = 0;
dcb.wReserved1 = 0;
/* Set serial port state */
if (!SetCommState(mHandle, &dcb)) {
qCritical() << "!e" << tr("Cannot set serial port speed to %1: %2")
.arg(speed)
.arg(lastErrorMessage());
return false;
}
/* Adjust serial port timeouts */
to.ReadIntervalTimeout = 0;
if(mMethod==HANDSHAKE_SOFTWARE)
{
to.ReadTotalTimeoutConstant = 300;
to.WriteTotalTimeoutConstant = 300;
to.ReadTotalTimeoutMultiplier = 200;
to.WriteTotalTimeoutMultiplier = 200;
}
else
{
to.ReadTotalTimeoutConstant = 0;
to.WriteTotalTimeoutConstant = 0;
to.ReadTotalTimeoutMultiplier = 100;
to.WriteTotalTimeoutMultiplier = 100;
}
/* Set serial port timeouts */
if (!SetCommTimeouts(mHandle, &to)) {
qCritical() << "!e" << tr("Cannot set serial port timeouts: %1").arg(lastErrorMessage());
return false;
}
emit statusChanged(tr("%1 bits/sec").arg(speed));
qWarning() << "!i" << tr("Serial port speed set to %1.").arg(speed);
mSpeed = speed;
return true;
}
int StandardSerialPortBackend::speed()
{
return mSpeed;
}
QByteArray StandardSerialPortBackend::readCommandFrame()
{
// qDebug() << "!d" << tr("DBG -- Serial Port readCommandFrame...");
QByteArray data;
if(mMethod==HANDSHAKE_SOFTWARE)
{
if (!PurgeComm(mHandle, PURGE_RXCLEAR)) {
qCritical() << "!e" << tr("Cannot clear serial port read buffer: %1").arg(lastErrorMessage());
return data;
}
const int size = 4;
quint8 expected = 0;
quint8 got = 1;
do
{
DWORD result;
char c;
if(ReadFile(mHandle, &c, 1, &result, NULL) && result == 1)
{
data.append(c);
if(data.size()==size+2)
{
data.remove(0,1);
}
if(data.size()==size+1)
{
for(int i=0 ; i<mSioDevices.size() ; i++)
{
if(data.at(0)==mSioDevices[i])
{
expected = (quint8)data.at(size);
got = sioChecksum(data, size);
break;
}
}
}
}
} while(got!=expected && !mCanceled);
if(got==expected)
{
data.resize(size);
// After sending the last byte of the command frame
// ATARI does not drop the command line immediately.
// Within this small time window ATARI is not able to process the ACK byte.
// For the "software handshake" approach, we need to wait here a little bit.
QThread::usleep(500);
}
else
{
data.clear();
}
}
else
{
DWORD MASK;
DWORD MODEM_STAT;
DWORD tmp;
switch (mMethod) {
case HANDSHAKE_RI:
MASK = EV_RING;
MODEM_STAT = MS_RING_ON;
break;
case HANDSHAKE_DSR:
MASK = EV_DSR;
MODEM_STAT = MS_DSR_ON;
break;
case HANDSHAKE_CTS:
MASK = EV_CTS;
MODEM_STAT = MS_CTS_ON;
break;
case HANDSHAKE_NO_HANDSHAKE:
default:
MASK = EV_RXCHAR;
MODEM_STAT = 0;
break;
}
if (!SetCommMask(mHandle, MASK)) {
qCritical() << "!e" << tr("Cannot set serial port event mask: %1").arg(lastErrorMessage());
return data;
}
int retries = 0, totalRetries = 0;
do {
data.clear();
OVERLAPPED ov;
memset(&ov, 0, sizeof(ov));
ov.hEvent = CreateEvent(0, true, false, 0);
HANDLE events[2];
events[0] = ov.hEvent;
events[1] = mCancelHandle;
if (!WaitCommEvent(mHandle, &tmp, &ov)) {
if (GetLastError() == ERROR_IO_PENDING) {
DWORD x = WaitForMultipleObjects(2, events, false, INFINITE);
CloseHandle(ov.hEvent);
if (x == WAIT_OBJECT_0 + 1) {
data.clear();
return data;
}
if (x == WAIT_FAILED) {
qCritical() << "!e" << tr("Cannot wait for serial port event: %1").arg(lastErrorMessage());
data.clear();
return data;
}
} else {
CloseHandle(ov.hEvent);
qCritical() << "!e" << tr("Cannot wait for serial port event: %1").arg(lastErrorMessage());
return data;
}
}
// if we use hardware handshake and the command line status was succesfully retrieved
if( (MODEM_STAT != 0) && GetCommModemStatus(mHandle, &tmp) )
{
if(respeqtSettings->serialPortTriggerOnFallingEdge())
{
// ignore the trigger is the command line status is ON (we're waiting for a falling edge)
if( tmp & MODEM_STAT )continue;
}
else
{
// ignore the trigger is the command line status is OFF (we're waiting for a rising edge)
if( !(tmp & MODEM_STAT) )continue;
}
}
if(MASK != EV_RXCHAR)
{
if (!PurgeComm(mHandle, PURGE_RXCLEAR)) {
qCritical() << "!e" << tr("Cannot clear serial port read buffer: %1").arg(lastErrorMessage());
return data;
}
}
// qDebug() << "!d" << tr("DBG -- Serial Port, just about to readDataFrame...");
data = readDataFrame(4, false);
if (!data.isEmpty()) {
// qDebug() << "!d" << tr("DBG -- Serial Port, data not empty: [%1]").arg(data.data());
if(MASK != EV_RXCHAR) { //
do {
GetCommModemStatus(mHandle, &tmp);
} while ((tmp & MODEM_STAT) && !mCanceled);
}
else
{
// After sending the last byte of the command frame
// ATARI does not drop the command line immediately.
// Within this small time window ATARI is not able to process the ACK byte.
// For the "software handshake" approach, we need to wait here a little bit.
QThread::usleep(500);
}
break;
} else {
retries++;
totalRetries++;
if (retries == 2) {
retries = 0;
if (mHighSpeed) {
setNormalSpeed();
} else {
setHighSpeed();
}
}
}
// } while (totalRetries < 100);
} while (1);
}
return data;
}
QByteArray StandardSerialPortBackend::readDataFrame(uint size, bool verbose)
{
// qDebug() << "!d" << tr("DBG -- Serial Port readDataFrame...");
QByteArray data = readRawFrame(size + 1, verbose);
if (data.isEmpty()) {
return data;
}
quint8 expected = (quint8)data.at(size);
quint8 got = sioChecksum(data, size);
if (expected == got) {
data.resize(size);
return data;
} else {
if (verbose) {
qWarning() << "!w" << tr("Data frame checksum error, expected: %1, got: %2. (%3)")
.arg(expected)
.arg(got)
.arg(QString(data.toHex()));
}
data.clear();
return data;
}
}
bool StandardSerialPortBackend::writeDataFrame(const QByteArray &data)
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeDataFrame...");
QByteArray copy(data);
copy.resize(copy.size() + 1);
copy[copy.size() - 1] = sioChecksum(copy, copy.size() - 1);
if(mMethod==HANDSHAKE_SOFTWARE)SioWorker::usleep(mWriteDelay);
SioWorker::usleep(50);
return writeRawFrame(copy);
}
bool StandardSerialPortBackend::writeCommandAck()
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeCommandAck...");
return writeRawFrame(QByteArray(1, SIO_ACK));
}
bool StandardSerialPortBackend::writeCommandNak()
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeCommandNak...");
return writeRawFrame(QByteArray(1, SIO_NACK));
}
bool StandardSerialPortBackend::writeDataAck()
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeDataAck...");
return writeRawFrame(QByteArray(1, SIO_ACK));
}
bool StandardSerialPortBackend::writeDataNak()
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeDataNak...");
return writeRawFrame(QByteArray(1, SIO_NACK));
}
bool StandardSerialPortBackend::writeComplete()
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeComplete...");
if(mMethod==HANDSHAKE_SOFTWARE)SioWorker::usleep(mWriteDelay);
else SioWorker::usleep(mCompErrDelay);
return writeRawFrame(QByteArray(1, SIO_COMPLETE));
}
bool StandardSerialPortBackend::writeError()
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeError...");
if(mMethod==HANDSHAKE_SOFTWARE)SioWorker::usleep(mWriteDelay);
else SioWorker::usleep(mCompErrDelay);
return writeRawFrame(QByteArray(1, SIO_ERROR));
}
quint8 StandardSerialPortBackend::sioChecksum(const QByteArray &data, uint size)
{
// qDebug() << "!d" << tr("DBG -- Serial Port sioChecksum...");
uint i;
uint sum = 0;
for (i=0; i < size; i++) {
sum += (quint8)data.at(i);
if (sum > 255) {
sum -= 255;
}
}
return sum;
}
QByteArray StandardSerialPortBackend::readRawFrame(uint size, bool verbose)
{
// qDebug() << "!d" << tr("DBG -- Serial Port readRawFrame...");
QByteArray data;
DWORD result;
if(mMethod==HANDSHAKE_SOFTWARE)
{
data.resize(size);
if (!ReadFile(mHandle, data.data(), size, &result, NULL) || (result != (DWORD)size))
{
data.clear();
}
}
else
{
OVERLAPPED ov;
memset(&ov, 0, sizeof(ov));
ov.hEvent = CreateEvent(0, true, false, 0);
if (ov.hEvent == INVALID_HANDLE_VALUE) {
qCritical() << "!e" << tr("Cannot create event: %1").arg(lastErrorMessage());
return data;
}
data.resize(size);
if (!ReadFile(mHandle, data.data(), size, &result, &ov)) {
if (GetLastError() == ERROR_IO_PENDING) {
if (!GetOverlappedResult(mHandle, &ov, &result, true)) {
qCritical() << "!e" << tr("Cannot read from serial port: %1").arg(lastErrorMessage());
data.clear();
CloseHandle(ov.hEvent);
return data;
}
} else {
qCritical() << "!e" << tr("Cannot read from serial port: %1").arg(lastErrorMessage());
data.clear();
CloseHandle(ov.hEvent);
return data;
}
}
CloseHandle(ov.hEvent);
if (result != (DWORD)size)
{
if(verbose)
{
qCritical() << "!e" << tr("Serial port read timeout.");
}
data.clear();
return data;
}
}
return data;
}
bool StandardSerialPortBackend::writeRawFrame(const QByteArray &data)
{
// qDebug() << "!d" << tr("DBG -- Serial Port writeRawFrame...");
DWORD result;
if (!PurgeComm(mHandle, PURGE_TXCLEAR)) {
qCritical() << "!e" << tr("Cannot clear serial port write buffer: %1").arg(lastErrorMessage());
return false;
}
if(mMethod==HANDSHAKE_SOFTWARE)
{
return WriteFile(mHandle, data.constData(), data.size(), &result, NULL);
}
else
{
OVERLAPPED ov;
memset(&ov, 0, sizeof(ov));
ov.hEvent = CreateEvent(0, true, false, 0);
if (!WriteFile(mHandle, data.constData(), data.size(), &result, &ov)) {
if (GetLastError() == ERROR_IO_PENDING) {
if (!GetOverlappedResult(mHandle, &ov, &result, true)) {
qCritical() << "!e" << tr("Cannot write to serial port: %1").arg(lastErrorMessage());
CloseHandle(ov.hEvent);
return false;
}
} else {
qCritical() << "!e" << tr("Cannot write to serial port: %1").arg(lastErrorMessage());
return false;
}
}
CloseHandle(ov.hEvent);
}
if (result != (DWORD)data.size()) {
qCritical() << "!e" << tr("Serial port write timeout.");
return false;
}
return true;
}
QString StandardSerialPortBackend::lastErrorMessage()
{
// qDebug() << "!d" << tr("DBG -- Serial Port lastErrorMessage...");
QString result;
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
result.setUtf16((ushort *)lpMsgBuf, wcslen((wchar_t*)lpMsgBuf) - 2);
LocalFree(lpMsgBuf);
return result;
}
void StandardSerialPortBackend::setActiveSioDevices(const QByteArray &data)
{
mSioDevices = data;
}
/* Dummy AtariSIO backend */
bool AtariSioBackend::open()
{
qCritical() << "!e" << tr("AtariSIO is only available under Linux.");
return false;
}
QString AtariSioBackend::defaultPortName()
{
return QString();
}
AtariSioBackend::AtariSioBackend(QObject *) {}
AtariSioBackend::~AtariSioBackend() {}
bool AtariSioBackend::isOpen() {return false;}
void AtariSioBackend::close() {}
void AtariSioBackend::cancel() {}
int AtariSioBackend::speedByte() {return 0;}
QByteArray AtariSioBackend::readCommandFrame() {return QByteArray();}
QByteArray AtariSioBackend::readDataFrame(uint, bool) {return QByteArray();}
bool AtariSioBackend::writeDataFrame(const QByteArray &) {return false;}
bool AtariSioBackend::writeCommandAck() {return false;}
bool AtariSioBackend::writeCommandNak() {return false;}
bool AtariSioBackend::writeDataAck() {return false;}
bool AtariSioBackend::writeDataNak() {return false;}
bool AtariSioBackend::writeComplete() {return false;}
bool AtariSioBackend::writeError() {return false;}
bool AtariSioBackend::setSpeed(int ) {return false;}
bool AtariSioBackend::writeRawFrame(const QByteArray &) {return false;}
void AtariSioBackend::setActiveSioDevices(const QByteArray &){}