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
|
/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* 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 "libaltos_private.h"
#include "libaltos_posix.h"
void
altos_set_last_posix_error(void)
{
altos_set_last_error(errno, strerror(errno));
}
PUBLIC struct altos_file *
altos_open(struct altos_device *device)
{
struct altos_file_posix *file = calloc (sizeof (struct altos_file_posix), 1);
int ret;
struct termios term;
if (!file) {
altos_set_last_posix_error();
return NULL;
}
// altos_set_last_error(12, "yeah yeah, failed again");
// free(file);
// return NULL;
file->fd = open(device->path, O_RDWR | O_NOCTTY);
if (file->fd < 0) {
altos_set_last_posix_error();
free(file);
return NULL;
}
#ifdef USE_POLL
pipe(file->pipe);
#else
file->out_fd = open(device->path, O_RDWR | O_NOCTTY);
if (file->out_fd < 0) {
altos_set_last_posix_error();
close(file->fd);
free(file);
return NULL;
}
#endif
ret = tcgetattr(file->fd, &term);
if (ret < 0) {
altos_set_last_posix_error();
close(file->fd);
#ifndef USE_POLL
close(file->out_fd);
#endif
free(file);
return NULL;
}
cfmakeraw(&term);
cfsetospeed(&term, B9600);
cfsetispeed(&term, B9600);
#ifdef USE_POLL
term.c_cc[VMIN] = 1;
term.c_cc[VTIME] = 0;
#else
term.c_cc[VMIN] = 0;
term.c_cc[VTIME] = 1;
#endif
ret = tcsetattr(file->fd, TCSAFLUSH, &term);
if (ret < 0) {
altos_set_last_posix_error();
close(file->fd);
#ifndef USE_POLL
close(file->out_fd);
#endif
free(file);
return NULL;
}
return &file->file;
}
PUBLIC void
altos_close(struct altos_file *file_common)
{
struct altos_file_posix *file = (struct altos_file_posix *) file_common;
if (file->fd != -1) {
int fd = file->fd;
file->fd = -1;
#ifdef USE_POLL
write(file->pipe[1], "\r", 1);
#else
close(file->out_fd);
file->out_fd = -1;
#endif
close(fd);
}
}
PUBLIC int
altos_flush(struct altos_file *file_common)
{
struct altos_file_posix *file = (struct altos_file_posix *) file_common;
if (file->file.out_used && 0) {
printf ("flush \"");
fwrite(file->file.out_data, 1, file->file.out_used, stdout);
printf ("\"\n");
}
while (file->file.out_used) {
int ret;
if (file->fd < 0)
return -EBADF;
#ifdef USE_POLL
ret = write (file->fd, file->file.out_data, file->file.out_used);
#else
ret = write (file->out_fd, file->file.out_data, file->file.out_used);
#endif
if (ret < 0) {
altos_set_last_posix_error();
return -altos_last_error.code;
}
if (ret) {
memmove(file->file.out_data, file->file.out_data + ret,
file->file.out_used - ret);
file->file.out_used -= ret;
}
}
return 0;
}
#ifdef USE_POLL
#include <poll.h>
#endif
int
altos_fill(struct altos_file *file_common, int timeout)
{
struct altos_file_posix *file = (struct altos_file_posix *) file_common;
int ret;
#ifdef USE_POLL
struct pollfd fd[2];
#endif
if (timeout == 0)
timeout = -1;
while (file->file.in_read == file->file.in_used) {
if (file->fd < 0)
return LIBALTOS_ERROR;
#ifdef USE_POLL
fd[0].fd = file->fd;
fd[0].events = POLLIN|POLLERR|POLLHUP|POLLNVAL;
fd[1].fd = file->pipe[0];
fd[1].events = POLLIN;
ret = poll(fd, 2, timeout);
if (ret < 0) {
altos_set_last_posix_error();
return LIBALTOS_ERROR;
}
if (ret == 0)
return LIBALTOS_TIMEOUT;
if (fd[0].revents & (POLLHUP|POLLERR|POLLNVAL))
return LIBALTOS_ERROR;
if (fd[0].revents & POLLIN)
#endif
{
ret = read(file->fd, file->file.in_data, USB_BUF_SIZE);
if (ret < 0) {
altos_set_last_posix_error();
return LIBALTOS_ERROR;
}
file->file.in_read = 0;
file->file.in_used = ret;
#ifndef USE_POLL
if (ret == 0 && timeout > 0)
return LIBALTOS_TIMEOUT;
#endif
}
}
if (file->file.in_used && 0) {
printf ("fill \"");
fwrite(file->file.in_data, 1, file->file.in_used, stdout);
printf ("\"\n");
}
return 0;
}
#include <time.h>
void
altos_pause_one_second(void)
{
struct timespec delay = { .tv_sec = 1, .tv_nsec = 0 };
nanosleep(&delay, NULL);
}
|