serial_lld.c
8.03 KB
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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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 of the License, or
(at your option) any later version.
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file Win32/serial_lld.c
* @brief Win32 low level simulated serial driver code.
* @addtogroup WIN32_SERIAL
* @{
*/
#include "ch.h"
#include "hal.h"
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/** @brief Serial driver 1 identifier.*/
#if USE_WIN32_SERIAL1 || defined(__DOXYGEN__)
SerialDriver SD1;
#endif
/** @brief Serial driver 2 identifier.*/
#if USE_WIN32_SERIAL2 || defined(__DOXYGEN__)
SerialDriver SD2;
#endif
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/** @brief Driver default configuration.*/
static const SerialConfig default_config = {
};
static u_long nb = 1;
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
static void init(SerialDriver *sdp, uint16_t port) {
struct sockaddr_in sad;
struct protoent *prtp;
if ((prtp = getprotobyname("tcp")) == NULL) {
printf("%s: Error mapping protocol name to protocol number\n", sdp->com_name);
goto abort;
}
sdp->com_listen = socket(PF_INET, SOCK_STREAM, prtp->p_proto);
if (sdp->com_listen == INVALID_SOCKET) {
printf("%s: Error creating simulator socket\n", sdp->com_name);
goto abort;
}
if (ioctlsocket(sdp->com_listen, FIONBIO, &nb) != 0) {
printf("%s: Unable to setup non blocking mode on socket\n", sdp->com_name);
goto abort;
}
memset(&sad, 0, sizeof(sad));
sad.sin_family = AF_INET;
sad.sin_addr.s_addr = INADDR_ANY;
sad.sin_port = htons(port);
if (bind(sdp->com_listen, (struct sockaddr *)&sad, sizeof(sad))) {
printf("%s: Error binding socket\n", sdp->com_name);
goto abort;
}
if (listen(sdp->com_listen, 1) != 0) {
printf("%s: Error listening socket\n", sdp->com_name);
goto abort;
}
printf("Full Duplex Channel %s listening on port %d\n", sdp->com_name, port);
return;
abort:
if (sdp->com_listen != INVALID_SOCKET)
closesocket(sdp->com_listen);
WSACleanup();
exit(1);
}
static bool_t connint(SerialDriver *sdp) {
if (sdp->com_data == INVALID_SOCKET) {
struct sockaddr addr;
int addrlen = sizeof(addr);
if ((sdp->com_data = accept(sdp->com_listen, &addr, &addrlen)) == INVALID_SOCKET)
return FALSE;
if (ioctlsocket(sdp->com_data, FIONBIO, &nb) != 0) {
printf("%s: Unable to setup non blocking mode on data socket\n", sdp->com_name);
goto abort;
}
chSysLockFromIsr();
chIOAddFlagsI(sdp, IO_CONNECTED);
chSysUnlockFromIsr();
return TRUE;
}
return FALSE;
abort:
if (sdp->com_listen != INVALID_SOCKET)
closesocket(sdp->com_listen);
if (sdp->com_data != INVALID_SOCKET)
closesocket(sdp->com_data);
WSACleanup();
exit(1);
}
static bool_t inint(SerialDriver *sdp) {
if (sdp->com_data != INVALID_SOCKET) {
int i;
uint8_t data[32];
/*
* Input.
*/
int n = recv(sdp->com_data, data, sizeof(data), 0);
switch (n) {
case 0:
closesocket(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
chSysLockFromIsr();
chIOAddFlagsI(sdp, IO_DISCONNECTED);
chSysUnlockFromIsr();
return FALSE;
case SOCKET_ERROR:
if (WSAGetLastError() == WSAEWOULDBLOCK)
return FALSE;
closesocket(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
return FALSE;
}
for (i = 0; i < n; i++) {
chSysLockFromIsr();
sdIncomingDataI(sdp, data[i]);
chSysUnlockFromIsr();
}
return TRUE;
}
return FALSE;
}
static bool_t outint(SerialDriver *sdp) {
if (sdp->com_data != INVALID_SOCKET) {
int n;
uint8_t data[1];
/*
* Input.
*/
chSysLockFromIsr();
n = sdRequestDataI(sdp);
chSysUnlockFromIsr();
if (n < 0)
return FALSE;
data[0] = (uint8_t)n;
n = send(sdp->com_data, data, sizeof(data), 0);
switch (n) {
case 0:
closesocket(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
chSysLockFromIsr();
chIOAddFlagsI(sdp, IO_DISCONNECTED);
chSysUnlockFromIsr();
return FALSE;
case SOCKET_ERROR:
if (WSAGetLastError() == WSAEWOULDBLOCK)
return FALSE;
closesocket(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
return FALSE;
}
return TRUE;
}
return FALSE;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* Low level serial driver initialization.
*/
void sd_lld_init(void) {
#if USE_WIN32_SERIAL1
sdObjectInit(&SD1, NULL, NULL);
SD1.com_listen = INVALID_SOCKET;
SD1.com_data = INVALID_SOCKET;
SD1.com_name = "SD1";
#endif
#if USE_WIN32_SERIAL1
sdObjectInit(&SD2, NULL, NULL);
SD2.com_listen = INVALID_SOCKET;
SD2.com_data = INVALID_SOCKET;
SD2.com_name = "SD2";
#endif
}
/**
* @brief Low level serial driver configuration and (re)start.
*
* @param[in] sdp pointer to a @p SerialDriver object
* @param[in] config the architecture-dependent serial driver configuration.
* If this parameter is set to @p NULL then a default
* configuration is used.
*/
void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
if (config == NULL)
config = &default_config;
#if USE_WIN32_SERIAL1
if (sdp == &SD1)
init(&SD1, SD1_PORT);
#endif
#if USE_WIN32_SERIAL1
if (sdp == &SD2)
init(&SD2, SD2_PORT);
#endif
}
/**
* @brief Low level serial driver stop.
* @details De-initializes the USART, stops the associated clock, resets the
* interrupt vector.
*
* @param[in] sdp pointer to a @p SerialDriver object
*/
void sd_lld_stop(SerialDriver *sdp) {
(void)sdp;
}
bool_t sd_lld_interrupt_pending(void) {
bool_t b;
CH_IRQ_PROLOGUE();
b = connint(&SD1) || connint(&SD2) ||
inint(&SD1) || inint(&SD2) ||
outint(&SD1) || outint(&SD2);
CH_IRQ_EPILOGUE();
return b;
}
#endif /* HAL_USE_SERIAL */
/** @} */