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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/****************************************************************************
* apps/nshlib/nsh_usbdev.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <assert.h>
#include <debug.h>
#ifdef CONFIG_CDCACM
# include <nuttx/usb/cdcacm.h>
#endif
#ifdef CONFIG_CDCACM
# include <nuttx/usb/pl2303.h>
#endif
#include "nsh.h"
#ifdef CONFIG_USBDEV
/****************************************************************************
* Definitions
****************************************************************************/
#if defined(CONFIG_DEBUG) || defined(CONFIG_NSH_USBCONSOLE)
# define trmessage lib_lowprintf
#else
# define trmessage printf
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_tracecallback
****************************************************************************/
#ifdef CONFIG_USBDEV_TRACE
static int nsh_tracecallback(struct usbtrace_s *trace, void *arg)
{
usbtrace_trprintf((trprintf_t)trmessage, trace->event, trace->value);
return 0;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_usbconsole
****************************************************************************/
#ifdef HAVE_USB_CONSOLE
int nsh_usbconsole(void)
{
char inch;
ssize_t nbytes;
int nlc;
int fd;
int ret;
/* Initialize any USB tracing options that were requested */
#ifdef CONFIG_USBDEV_TRACE
usbtrace_enable(TRACE_BITSET);
#endif
/* Don't start the NSH console until the console device is ready. Chances
* are, we get here with no functional console. The USB console will not
* be available until the device is connected to the host and until the
* host-side application opens the connection.
*/
/* Initialize the USB serial driver */
#if defined(CONFIG_PL2303) || defined(CONFIG_CDCACM)
#ifdef CONFIG_CDCACM
ret = cdcacm_initialize(CONFIG_NSH_UBSDEV_MINOR, NULL);
#else
ret = usbdev_serialinitialize(CONFIG_NSH_UBSDEV_MINOR);
#endif
DEBUGASSERT(ret == OK);
#endif
/* Open the USB serial device for read/write access */
do
{
/* Try to open the console */
fd = open(CONFIG_NSH_USBCONDEV, O_RDWR);
if (fd < 0)
{
/* ENOTCONN means that the USB device is not yet connected. Anything
* else is bad.
*/
DEBUGASSERT(errno == ENOTCONN);
/* Sleep a bit and try again */
sleep(2);
}
}
while (fd < 0);
/* Now waiting until we successfully read a carriage return a few times.
* That is a sure way of know that there is something at the other end of
* the USB serial connection that is ready to talk with us. The user needs
* to hit ENTER a few times to get things started.
*/
nlc = 0;
do
{
/* Read one byte */
inch = 0;
nbytes = read(fd, &inch, 1);
/* Is it a carriage return (or maybe a newline)? */
if (nbytes == 1 && (inch == '\n' || inch == '\r'))
{
/* Yes.. increment the count */
nlc++;
}
else
{
/* No.. Reset the count. We need to see 3 in a row to continue. */
nlc = 0;
}
}
while (nlc < 3);
/* Make sure the stdin, stdout, and stderr are closed */
(void)fclose(stdin);
(void)fclose(stdout);
(void)fclose(stderr);
/* Dup the fd to create standard fd 0-2 */
(void)dup2(fd, 0);
(void)dup2(fd, 1);
(void)dup2(fd, 2);
/* We can close the original file descriptor now (unless it was one of 0-2) */
if (fd > 2)
{
close(fd);
}
/* fdopen to get the stdin, stdout and stderr streams. The following logic depends
* on the fact that the library layer will allocate FILEs in order. And since
* we closed stdin, stdout, and stderr above, that is what we should get.
*
* fd = 0 is stdin (read-only)
* fd = 1 is stdout (write-only, append)
* fd = 2 is stderr (write-only, append)
*/
(void)fdopen(0, "r");
(void)fdopen(1, "a");
(void)fdopen(2, "a");
return OK;
}
#endif /* HAVE_USB_CONSOLE */
/****************************************************************************
* Name: nsh_usbtrace
****************************************************************************/
#if defined(CONFIG_USBDEV_TRACE) && defined(HAVE_USB_CONSOLE)
void nsh_usbtrace(void)
{
(void)usbtrace_enumerate(nsh_tracecallback, NULL);
}
#endif
#endif /* CONFIG_USBDEV */
|
