1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/* -*- 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 2, 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));
}
|
