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/* -*- c++ -*- */
/*
* Copyright 2001,2003,2004 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <ppio_ppdev.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <iostream>
#include <errno.h>
#include <stdio.h>
#include <stdexcept>
#ifdef HAVE_LINUX_PPDEV_H
#include <sys/ioctl.h>
#include <linux/ppdev.h>
#include <linux/parport.h>
#include <sstream>
#else
// #warn "ppio_ppdev is not functional on this platform"
#endif
// These control port bits are active low.
// We toggle them so that this weirdness doesn't get get propagated
// through our interface.
static int CP_ACTIVE_LOW_BITS = 0x0B;
// These status port bits are active low.
// We toggle them so that this weirdness doesn't get get propagated
// through our interface.
static int SP_ACTIVE_LOW_BITS = 0x80;
#ifndef HAVE_LINUX_PPDEV_H // use stubs
ppio_ppdev::ppio_ppdev (int which)
{
std::cerr << "ppio_ppdev: Not implemented on this platform\n";
throw std::runtime_error ("not implmeneted");
}
ppio_ppdev::~ppio_ppdev ()
{
}
void
ppio_ppdev::write_data (unsigned char v)
{
}
unsigned char
ppio_ppdev::read_data ()
{
return 0;
}
void
ppio_ppdev::write_control (unsigned char v)
{
}
unsigned char
ppio_ppdev::read_control ()
{
return 0;
}
unsigned char
ppio_ppdev::read_status ()
{
return 0;
}
void
ppio_ppdev::lock ()
{
}
void
ppio_ppdev::unlock ()
{
}
#else
// The real code...
ppio_ppdev::ppio_ppdev (int which)
{
std::ostringstream filename;
filename << "/dev/parport" << which;
const char *c_filename = filename.str().c_str();
if ((d_fd = open (c_filename, O_RDWR)) < 0){
int my_errno = errno;
perror (c_filename);
if (my_errno == ENOENT){
std::cerr << "Does the device file " << c_filename << " exist?\n";
std::cerr << "If not, as root execute: \n";
std::cerr << " # mknod " << c_filename << " c 99 0\n";
std::cerr << " # chmod 666 " << c_filename << std::endl;
}
throw std::runtime_error ("open");
}
int mode = IEEE1284_MODE_COMPAT;
if (ioctl (d_fd, PPSETMODE, &mode) != 0){
perror ("ppio_ppdev: PPSETMODE");
close (d_fd);
throw std::runtime_error ("PPSETMODE");
}
}
ppio_ppdev::~ppio_ppdev ()
{
close (d_fd);
}
void
ppio_ppdev::write_data (unsigned char v)
{
if (ioctl (d_fd, PPWDATA, &v) != 0){
perror ("ppio_ppdev: PPWDATA");
throw std::runtime_error ("PPWDATA");
}
}
unsigned char
ppio_ppdev::read_data ()
{
unsigned char v;
if (ioctl (d_fd, PPRDATA, &v) != 0){
perror ("ppio_ppdev: PPRDATA");
throw std::runtime_error ("PPRDATA");
}
return v;
}
void
ppio_ppdev::write_control (unsigned char v)
{
unsigned char ctrl = v ^ CP_ACTIVE_LOW_BITS;
if (ioctl (d_fd, PPWCONTROL, &ctrl) != 0){
perror ("ppio_ppdev: PPWCONTROL");
throw std::runtime_error ("PPWCONTROL");
}
}
unsigned char
ppio_ppdev::read_control ()
{
unsigned char ctrl;
if (ioctl (d_fd, PPRCONTROL, &ctrl) != 0){
perror ("ppio_ppdev: PPRCONTROL");
throw std::runtime_error ("PPRCONTROL");
}
return ctrl ^ CP_ACTIVE_LOW_BITS;
}
unsigned char
ppio_ppdev::read_status ()
{
unsigned char status;
if (ioctl (d_fd, PPRSTATUS, &status) != 0){
perror ("ppio_ppdev: PPRSTATUS");
throw std::runtime_error ("PPRSTATUS");
}
return status ^ SP_ACTIVE_LOW_BITS;
}
void
ppio_ppdev::lock ()
{
if (ioctl (d_fd, PPCLAIM) != 0){
perror ("ppio_ppdev: PPCLAIM");
throw std::runtime_error ("PPCLAIM");
}
}
void
ppio_ppdev::unlock ()
{
if (ioctl (d_fd, PPRELEASE) != 0){
perror ("ppio_ppdev: PPRELEASE");
throw std::runtime_error ("PPRELEASE");
}
}
#endif
ppio_ppdev_sptr
make_ppio_ppdev (int which)
{
return ppio_ppdev_sptr (new ppio_ppdev (which));
}
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