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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <unistd.h> | |
24 | #include <string.h> | |
25 | #include <sigrok.h> | |
26 | #include "config.h" | |
27 | ||
28 | #define BUFSIZE 4096 | |
29 | ||
30 | #define NUM_PROBES 8 | |
31 | #define NUM_TRIGGER_STAGES 4 | |
32 | #define TRIGGER_TYPES "01" | |
33 | ||
34 | /* Software trigger implementation: positive values indicate trigger stage. */ | |
35 | #define TRIGGER_FIRED -1 | |
36 | ||
37 | #define USB_MODEL_NAME "demodevice" | |
38 | #define USB_VENDOR_NAME "demovendor" | |
39 | #define USB_MODEL_VERSION "1.0" | |
40 | ||
41 | #define GENMODE_RANDOM 1 | |
42 | #define GENMODE_INC 2 | |
43 | ||
44 | static GThread *my_thread; | |
45 | static int thread_running; | |
46 | ||
47 | static int capabilities[] = { | |
48 | HWCAP_LOGIC_ANALYZER, | |
49 | HWCAP_SAMPLERATE, | |
50 | HWCAP_LIMIT_SAMPLES, | |
51 | HWCAP_CONTINUOUS | |
52 | }; | |
53 | ||
54 | /* Random selection of samplerates this "device" shall support. */ | |
55 | static uint64_t supported_samplerates[] = { | |
56 | KHZ(100), | |
57 | KHZ(500), | |
58 | MHZ(1), | |
59 | MHZ(2), | |
60 | MHZ(12), | |
61 | MHZ(24), | |
62 | 0, | |
63 | }; | |
64 | ||
65 | static struct samplerates samplerates = { | |
66 | KHZ(100), | |
67 | MHZ(24), | |
68 | 0, | |
69 | supported_samplerates, | |
70 | }; | |
71 | ||
72 | struct databag { | |
73 | int pipe_fds[2]; | |
74 | uint8_t sample_generator; | |
75 | uint8_t thread_running; | |
76 | uint64_t samples_counter; | |
77 | int device_index; | |
78 | int loop_sleep; | |
79 | gpointer session_device_id; | |
80 | }; | |
81 | ||
82 | /* List of struct sigrok_device_instance, maintained by opendev()/closedev(). */ | |
83 | static GSList *device_instances = NULL; | |
84 | ||
85 | /* TODO: All of these should go in a device-specific struct. */ | |
86 | static uint64_t cur_samplerate = 0; | |
87 | static uint64_t limit_samples = -1; | |
88 | // static uint8_t probe_mask = 0; | |
89 | // static uint8_t trigger_mask[NUM_TRIGGER_STAGES] = { 0 }; | |
90 | // static uint8_t trigger_value[NUM_TRIGGER_STAGES] = { 0 }; | |
91 | // static uint8_t trigger_buffer[NUM_TRIGGER_STAGES] = { 0 }; | |
92 | ||
93 | // static int trigger_stage = TRIGGER_FIRED; | |
94 | ||
95 | static int hw_set_configuration(int device_index, int capability, void *value); | |
96 | static void hw_stop_acquisition(int device_index, gpointer session_device_id); | |
97 | ||
98 | static int hw_init(char *deviceinfo) | |
99 | { | |
100 | /* Avoid compiler warning. */ | |
101 | deviceinfo = deviceinfo; | |
102 | ||
103 | struct sigrok_device_instance *sdi; | |
104 | ||
105 | sdi = sigrok_device_instance_new(0, ST_ACTIVE, | |
106 | USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); | |
107 | ||
108 | if (!sdi) | |
109 | return 0; | |
110 | device_instances = g_slist_append(device_instances, sdi); | |
111 | ||
112 | return 1; | |
113 | } | |
114 | ||
115 | static int hw_opendev(int device_index) | |
116 | { | |
117 | /* Avoid compiler warning. */ | |
118 | device_index = device_index; | |
119 | ||
120 | /* Nothing needed so far. */ | |
121 | return SIGROK_OK; | |
122 | } | |
123 | ||
124 | static void hw_closedev(int device_index) | |
125 | { | |
126 | /* Avoid compiler warning. */ | |
127 | device_index = device_index; | |
128 | ||
129 | /* Nothing needed so far. */ | |
130 | } | |
131 | ||
132 | static void hw_cleanup(void) | |
133 | { | |
134 | /* Nothing needed so far. */ | |
135 | } | |
136 | ||
137 | static void *hw_get_device_info(int device_index, int device_info_id) | |
138 | { | |
139 | struct sigrok_device_instance *sdi; | |
140 | void *info = NULL; | |
141 | ||
142 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
143 | return NULL; | |
144 | ||
145 | switch (device_info_id) { | |
146 | case DI_INSTANCE: | |
147 | info = sdi; | |
148 | break; | |
149 | case DI_NUM_PROBES: | |
150 | info = GINT_TO_POINTER(NUM_PROBES); | |
151 | break; | |
152 | case DI_SAMPLERATES: | |
153 | info = &samplerates; | |
154 | break; | |
155 | case DI_TRIGGER_TYPES: | |
156 | info = TRIGGER_TYPES; | |
157 | break; | |
158 | case DI_CUR_SAMPLERATE: | |
159 | info = &cur_samplerate; | |
160 | break; | |
161 | } | |
162 | ||
163 | return info; | |
164 | } | |
165 | ||
166 | static int hw_get_status(int device_index) | |
167 | { | |
168 | /* Avoid compiler warning. */ | |
169 | device_index = device_index; | |
170 | ||
171 | return 0; /* FIXME */ | |
172 | } | |
173 | ||
174 | static int *hw_get_capabilities(void) | |
175 | { | |
176 | return capabilities; | |
177 | } | |
178 | ||
179 | static int hw_set_configuration(int device_index, int capability, void *value) | |
180 | { | |
181 | int ret; | |
182 | uint64_t *tmp_u64; | |
183 | ||
184 | /* Avoid compiler warning. */ | |
185 | device_index = device_index; | |
186 | ||
187 | if (capability == HWCAP_SAMPLERATE) { | |
188 | cur_samplerate = *(uint64_t *) value; | |
189 | ret = SIGROK_OK; | |
190 | } else if (capability == HWCAP_PROBECONFIG) { | |
191 | // ret = configure_probes((GSList *) value); FIXME | |
192 | ret = SIGROK_OK; | |
193 | } else if (capability == HWCAP_LIMIT_SAMPLES) { | |
194 | tmp_u64 = value; | |
195 | limit_samples = *tmp_u64; | |
196 | ret = SIGROK_OK; | |
197 | } else { | |
198 | ret = SIGROK_ERR; | |
199 | } | |
200 | ||
201 | return ret; | |
202 | } | |
203 | ||
204 | static void samples_generator(uint8_t *buf, uint64_t size, void *data) | |
205 | { | |
206 | struct databag *mydata = data; | |
207 | uint64_t i; | |
208 | ||
209 | memset(buf, 0, size); | |
210 | ||
211 | switch (mydata->sample_generator) { | |
212 | case GENMODE_RANDOM: /* Random */ | |
213 | for (i = 0; i < size; i++) | |
214 | *(buf + i) = (uint8_t)(rand() & 0xff); | |
215 | break; | |
216 | case GENMODE_INC: /* Simple increment */ | |
217 | for (i = 0; i < size; i++) | |
218 | *(buf + i) = i; | |
219 | break; | |
220 | } | |
221 | } | |
222 | ||
223 | /* Thread function */ | |
224 | static void thread_func(void *data) | |
225 | { | |
226 | struct databag *mydata = data; | |
227 | uint8_t buf[BUFSIZE]; | |
228 | uint64_t nb_to_send = 0; | |
229 | ||
230 | while (thread_running) { | |
231 | if (limit_samples) | |
232 | nb_to_send = limit_samples - mydata->samples_counter; | |
233 | else | |
234 | nb_to_send = BUFSIZE; // CONTINUOUS MODE | |
235 | ||
236 | if (nb_to_send == 0) { | |
237 | close(mydata->pipe_fds[1]); | |
238 | thread_running = 0; | |
239 | hw_stop_acquisition(mydata->device_index, | |
240 | mydata->session_device_id); | |
241 | } else if (nb_to_send > BUFSIZE) { | |
242 | nb_to_send = BUFSIZE; | |
243 | } | |
244 | ||
245 | samples_generator(buf, nb_to_send, data); | |
246 | mydata->samples_counter += nb_to_send; | |
247 | ||
248 | write(mydata->pipe_fds[1], &buf, nb_to_send); | |
249 | g_usleep(mydata->loop_sleep); | |
250 | } | |
251 | } | |
252 | ||
253 | /* Callback handling data */ | |
254 | static int receive_data(int fd, int revents, void *user_data) | |
255 | { | |
256 | struct datafeed_packet packet; | |
257 | /* uint16_t samples[1000]; */ | |
258 | char c[BUFSIZE]; | |
259 | uint64_t z; | |
260 | ||
261 | /* Avoid compiler warnings. */ | |
262 | revents = revents; | |
263 | ||
264 | z = read(fd, &c, BUFSIZE); | |
265 | if (z > 0) { | |
266 | packet.type = DF_LOGIC; | |
267 | packet.length = z; | |
268 | packet.unitsize = 1; | |
269 | packet.payload = c; | |
270 | session_bus(user_data, &packet); | |
271 | } | |
272 | return TRUE; | |
273 | } | |
274 | ||
275 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
276 | { | |
277 | struct datafeed_packet *packet; | |
278 | struct datafeed_header *header; | |
279 | unsigned char *buf; | |
280 | struct databag *mydata; | |
281 | ||
282 | mydata = malloc(sizeof(struct databag)); | |
283 | if (!mydata) | |
284 | return SIGROK_ERR_MALLOC; | |
285 | ||
286 | mydata->sample_generator = GENMODE_RANDOM; | |
287 | mydata->session_device_id = session_device_id; | |
288 | mydata->device_index = device_index; | |
289 | mydata->samples_counter = 0; | |
290 | mydata->loop_sleep = 100000; | |
291 | ||
292 | if (pipe(mydata->pipe_fds)) { | |
293 | fprintf(stderr, "Pipe failed.\n"); | |
294 | return SIGROK_ERR_MALLOC; /* FIXME */ | |
295 | ||
296 | } | |
297 | source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40, receive_data, | |
298 | session_device_id); | |
299 | ||
300 | /* Run the demo thread. */ | |
301 | g_thread_init(NULL); | |
302 | thread_running = 1; | |
303 | my_thread = | |
304 | g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL); | |
305 | if (!my_thread) { | |
306 | fprintf(stderr, "demo: Thread creation failed.\n"); | |
307 | return SIGROK_ERR_MALLOC; /* FIXME */ | |
308 | } | |
309 | ||
310 | packet = malloc(sizeof(struct datafeed_packet)); | |
311 | header = malloc(sizeof(struct datafeed_header)); | |
312 | buf = malloc(2048); | |
313 | if (!packet || !header || !buf) | |
314 | return SIGROK_ERR_MALLOC; | |
315 | ||
316 | /* FIXME */ | |
317 | memset(buf, 0x55, 2048); | |
318 | ||
319 | packet->type = DF_HEADER; | |
320 | packet->length = sizeof(struct datafeed_header); | |
321 | packet->payload = (unsigned char *)header; | |
322 | header->feed_version = 1; | |
323 | gettimeofday(&header->starttime, NULL); | |
324 | header->samplerate = cur_samplerate; | |
325 | header->protocol_id = PROTO_RAW; | |
326 | header->num_logic_probes = NUM_PROBES; | |
327 | header->num_analog_probes = 0; | |
328 | session_bus(session_device_id, packet); | |
329 | free(header); | |
330 | free(packet); | |
331 | ||
332 | return SIGROK_OK; | |
333 | } | |
334 | ||
335 | /* This stops acquisition on ALL devices, ignoring device_index. */ | |
336 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) | |
337 | { | |
338 | struct datafeed_packet packet; | |
339 | ||
340 | /* QUICK HACK */ | |
341 | device_index = device_index; | |
342 | ||
343 | /* Send last packet. */ | |
344 | packet.type = DF_END; | |
345 | session_bus(session_device_id, &packet); | |
346 | } | |
347 | ||
348 | struct device_plugin demo_plugin_info = { | |
349 | "demo", | |
350 | 1, | |
351 | hw_init, | |
352 | hw_cleanup, | |
353 | hw_opendev, | |
354 | hw_closedev, | |
355 | hw_get_device_info, | |
356 | hw_get_status, | |
357 | hw_get_capabilities, | |
358 | hw_set_configuration, | |
359 | hw_start_acquisition, | |
360 | hw_stop_acquisition, | |
361 | }; |