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// HamFax -- an application for sending and receiving amateur radio facsimiles
// Copyright (C) 2001 Christof Schmitt, DH1CS <cschmitt@users.sourceforge.net>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "PTC.hpp"
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <qtimer.h>
#include "Error.hpp"
PTC::PTC(QObject* parent)
: QObject(parent), deviceName("/dev/ttyS0"),
device(-1), fm(true), speed(38400), deviation(0), notifier(0)
{
}
PTC::~PTC(void)
{
if(device!=-1) {
write(device,"\377",1); // return from fax mode
::close(device);
}
}
void PTC::setDeviceName(const QString& s)
{
deviceName=s;
}
void PTC::open(void)
{
try {
device=::open(deviceName,O_RDWR|O_NOCTTY|O_NONBLOCK);
if(device==-1) {
throw Error("could not open serial device");
}
struct termios options;
tcgetattr(device,&options);
switch(speed) {
case 38400:
cfsetispeed(&options,B38400);
cfsetospeed(&options,B38400);
break;
case 57600:
cfsetispeed(&options,B57600);
cfsetospeed(&options,B57600);
break;
case 115200:
cfsetispeed(&options,B115200);
cfsetospeed(&options,B115200);
break;
}
options.c_cflag|=CRTSCTS;
options.c_cc[VMIN]=0;
options.c_cc[VTIME]=0;
cfmakeraw(&options);
if(tcsetattr(device,TCSAFLUSH,&options)==-1) {
throw Error("could not set serial parameters");
}
write(device,"\r\r",2);
QString s=QString("FAX MBAUD %1\r").arg(speed);
write(device,s,s.length());
s=QString("FAX DEVIATION %1\r").arg(deviation);
write(device,s,s.length());
s=QString("FAX %1\r").arg(fm ? "JVCOMM :HamFax FM":"AMFAX");
write(device,s,s.length());
usleep(300000);
tcflush(device,TCIOFLUSH);
} catch(Error) {
close();
throw;
}
}
void PTC::startInput(void)
{
open();
notifier=new QSocketNotifier(device,QSocketNotifier::Read);
connect(notifier,SIGNAL(activated(int)),this,SLOT(read(int)));
emit newSampleRate(speed/10);
}
void PTC::startOutput(void)
{
open();
notifier=new QSocketNotifier(device,QSocketNotifier::Write);
connect(notifier,SIGNAL(activated(int)),this,SLOT(checkSpace(int)));
emit newSampleRate(speed/20);
}
void PTC::end(void)
{
if(device!=-1) {
notifier->setEnabled(false);
if(notifier->type()==QSocketNotifier::Read) {
disconnect(notifier,SIGNAL(activated(int)),
this,SLOT(read(int)));
close();
} else {
disconnect(notifier,SIGNAL(activated(int)),
this,SLOT(checkSpace(int)));
int i;
ioctl(device,TIOCOUTQ,&i);
QTimer::singleShot(1000*(i+8000)*20/speed,
this,SLOT(close()));
}
delete notifier;
}
}
void PTC::close(void)
{
if(device!=-1) {
write(device,"\377",1); // return from fax mode
::close(device);
device=-1;
emit deviceClosed();
}
}
void PTC::transmit(double* samples, int count)
{
try {
notifier->setEnabled(false);
unsigned char buf[count];
for(int i=0; i<count; i++) {
buf[i]=static_cast<unsigned char>
(samples[i]*(fm?240.0:63.0));
}
tcflush(device,TCIFLUSH);
if(write(device,buf,count)!=count) {
throw Error();
}
notifier->setEnabled(true);
} catch(Error) {
close();
}
}
void PTC::setDeviation(int dev)
{
deviation=dev;
}
void PTC::setFM(bool fm)
{
this->fm=fm;
}
void PTC::setSpeed(int s)
{
speed=s;
}
void PTC::read(int fd)
{
int n=512;
unsigned char charbuffer[n];
n=::read(device,charbuffer,n);
int intbuffer[n];
for(int i=0; i<n; i++) {
intbuffer[i]=charbuffer[i];
}
emit data(intbuffer,n);
}
void PTC::checkSpace(int fd)
{
emit spaceLeft(512);
}
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