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dc90146e A |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
bac2a8b8 | 4 | * Copyright (C) 2022 Shawn Walker <ac0bi00@gmail.com> |
dc90146e A |
5 | * |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
bac2a8b8 A |
19 | #define _GNU_SOURCE |
20 | ||
dc90146e | 21 | #include <config.h> |
bac2a8b8 A |
22 | #include <errno.h> |
23 | #include <glib.h> | |
24 | #include <math.h> | |
25 | #include <stdlib.h> | |
26 | #include <stdarg.h> | |
27 | #include <string.h> | |
28 | #include <time.h> | |
29 | #include <unistd.h> | |
30 | #include <libsigrok/libsigrok.h> | |
31 | #include "libsigrok-internal.h" | |
dc90146e A |
32 | #include "protocol.h" |
33 | ||
ac132f83 A |
34 | SR_PRIV int send_serial_str(struct sr_serial_dev_inst *serial, char *str) |
35 | { | |
36 | int len = strlen(str); | |
dbf599ec | 37 | if ((len > 15) || (len < 1)) { |
ac132f83 A |
38 | sr_err("ERROR:Serial string len %d invalid ", len); |
39 | return SR_ERR; | |
40 | } | |
dbf599ec A |
41 | /*100ms timeout. With USB CDC serial we can't define the timeout |
42 | based on link rate, so just pick something large as we shouldn't normally see them */ | |
ac132f83 A |
43 | if (serial_write_blocking(serial, str, len, 100) != len) { |
44 | sr_err("ERROR:Serial str write failed"); | |
45 | return SR_ERR; | |
46 | } | |
47 | ||
48 | return SR_OK; | |
49 | } | |
50 | ||
51 | SR_PRIV int send_serial_char(struct sr_serial_dev_inst *serial, char ch) | |
52 | { | |
53 | char buf[1]; | |
54 | buf[0] = ch; | |
dbf599ec | 55 | if (serial_write_blocking(serial, buf, 1, 100) != 1) { /*100ms */ |
ac132f83 A |
56 | sr_err("ERROR:Serial char write failed"); |
57 | return SR_ERR; | |
58 | } | |
59 | return SR_OK; | |
bac2a8b8 | 60 | } |
ac132f83 | 61 | |
dbf599ec A |
62 | /* Issue a command that expects a string return that is less than 30 characters. |
63 | returns the length of string */ | |
ac132f83 A |
64 | int send_serial_w_resp(struct sr_serial_dev_inst *serial, char *str, |
65 | char *resp, size_t cnt) | |
66 | { | |
67 | int num_read, i; | |
68 | send_serial_str(serial, str); | |
dbf599ec A |
69 | /*Using the serial_read_blocking function when reading a response of unknown length requires |
70 | a long worst case timeout to always be taken. So, instead loop waiting for a first byte, and | |
71 | then a final small delay for the rest. */ | |
72 | for (i = 0; i < 1000; i++) { /* wait up to 1 second in ms increments */ | |
ac132f83 A |
73 | num_read = serial_read_blocking(serial, resp, cnt, 1); |
74 | if (num_read > 0) | |
75 | break; | |
76 | } | |
dbf599ec A |
77 | /* Since the serial port is usb CDC we can't calculate timeouts based on baud rate but |
78 | even if the response is split between two USB transfers 10ms should be plenty. */ | |
ac132f83 A |
79 | num_read += |
80 | serial_read_blocking(serial, &(resp[num_read]), cnt - num_read, | |
81 | 10); | |
ac132f83 A |
82 | if ((num_read < 1) || (num_read > 30)) { |
83 | sr_err("ERROR:Serial_w_resp failed (%d).", num_read); | |
84 | return -1; | |
85 | } else { | |
86 | return num_read; | |
87 | } | |
88 | } | |
89 | ||
dbf599ec | 90 | /*Issue a command that expects a single char ack */ |
ac132f83 A |
91 | SR_PRIV int send_serial_w_ack(struct sr_serial_dev_inst *serial, char *str) |
92 | { | |
93 | char buf[2]; | |
94 | int num_read; | |
dbf599ec A |
95 | /*In case we have left over transfer from the device, drain them |
96 | These should not exist in normal operation */ | |
ac132f83 | 97 | while ((num_read = serial_read_blocking(serial, buf, 2, 10))) { |
b9890a32 | 98 | sr_dbg("swack drops 2 bytes %d %d",buf[0],buf[1]); |
ac132f83 A |
99 | } |
100 | send_serial_str(serial, str); | |
dbf599ec | 101 | /*1000ms timeout */ |
ac132f83 A |
102 | num_read = serial_read_blocking(serial, buf, 1, 1000); |
103 | if ((num_read == 1) && (buf[0] == '*')) { | |
104 | return SR_OK; | |
105 | } else { | |
106 | sr_err("ERROR:Serial_w_ack %s failed (%d).", str, | |
107 | num_read); | |
108 | if (num_read) { | |
109 | sr_err("ack resp char %c d %d\n\r", buf[0], | |
110 | buf[0]); | |
111 | } | |
112 | return SR_ERR; | |
113 | } | |
114 | } | |
bac2a8b8 | 115 | |
dbf599ec A |
116 | /*Process incoming data stream assuming it is optimized packing of 4 channels or less |
117 | Each byte is 4 channels of data and a 3 bit rle value, or a larger rle value, or a control signal. | |
118 | This also checks for aborts and ends. | |
119 | If an end is seen we stop processing but do not check the byte_cnt | |
120 | The output is a set of samples fed to process group to perform sw triggering and sending of data to the session | |
121 | as well as maintenance of the serial rx byte cnt. | |
122 | Since we can get huge rle values we chop them up for processing into smaller groups | |
123 | In this mode we can always consume all bytes because there are no cases where the processing of one | |
124 | byte requires the one after it. | |
125 | */ | |
ac132f83 A |
126 | void process_D4(struct sr_dev_inst *sdi, struct dev_context *d) |
127 | { | |
128 | uint32_t j; | |
129 | uint8_t cbyte; | |
130 | uint8_t cval; | |
131 | uint32_t rlecnt = 0; | |
ac132f83 A |
132 | while (d->ser_rdptr < d->bytes_avail) { |
133 | cbyte = d->buffer[(d->ser_rdptr)]; | |
dbf599ec | 134 | /*RLE only byte */ |
ac132f83 A |
135 | if (cbyte >= 48 && cbyte <= 127) { |
136 | rlecnt += (cbyte - 47) * 8; | |
137 | d->byte_cnt++; | |
dbf599ec | 138 | } else if (cbyte >= 0x80) { /*sample with possible rle */ |
ac132f83 A |
139 | rlecnt += (cbyte & 0x70) >> 4; |
140 | if (rlecnt) { | |
dbf599ec | 141 | /*On a value change, duplicate the previous values first.*/ |
ac132f83 A |
142 | rle_memset(d, rlecnt); |
143 | rlecnt = 0; | |
ac132f83 | 144 | } |
dbf599ec | 145 | /*Finally add in the new values*/ |
ac132f83 | 146 | cval = cbyte & 0xF; |
0c792900 A |
147 | uint32_t didx=(d->cbuf_wrptr) * (d->dig_sample_bytes); |
148 | d->d_data_buf[didx] = cval; | |
dbf599ec | 149 | /*pad in all other bytes since the sessions even wants disabled channels reported*/ |
ac132f83 | 150 | for (j = 1; j < d->dig_sample_bytes; j++) { |
0c792900 | 151 | d->d_data_buf[didx+j] = 0; |
ac132f83 | 152 | } |
ac132f83 A |
153 | d->byte_cnt++; |
154 | sr_spew | |
0c792900 | 155 | ("Dchan4 rdptr %d wrptr %d bytein 0x%X rle %d cval 0x%X didx %d\n", |
ac132f83 | 156 | (d->ser_rdptr) - 1, d->cbuf_wrptr, cbyte, |
0c792900 A |
157 | rlecnt, cval,didx); |
158 | d->cbuf_wrptr++; | |
ac132f83 | 159 | rlecnt = 0; |
ac132f83 A |
160 | d->d_last[0] = cval; |
161 | } | |
dbf599ec | 162 | /*Any other character ends parsing - it could be a frame error or a start of the final byte cnt*/ |
ac132f83 A |
163 | else { |
164 | if (cbyte == '$') { | |
165 | sr_info | |
166 | ("D4 Data stream stops with cbyte %d char %c rdidx %d cnt %llu", | |
167 | cbyte, cbyte, d->ser_rdptr, | |
168 | d->byte_cnt); | |
169 | d->rxstate = RX_STOPPED; | |
170 | } else { | |
171 | sr_err | |
172 | ("D4 Data stream aborts with cbyte %d char %c rdidx %d cnt %llu", | |
173 | cbyte, cbyte, d->ser_rdptr, | |
174 | d->byte_cnt); | |
175 | d->rxstate = RX_ABORT; | |
176 | } | |
dbf599ec | 177 | break; /* break from while loop*/ |
ac132f83 A |
178 | } |
179 | (d->ser_rdptr)++; | |
dbf599ec A |
180 | /*To ensure we don't overflow the sample buffer, but still send it large chunks of data |
181 | (to make the packet sends to the session efficient) only call process group after | |
182 | a large number of samples have been seen. | |
183 | cbuf_wrptr counts slices, so shift right by 2 to create a worst case x4 multiple ratio of | |
184 | cbuf_wrptr value to the depth of the sample buffer. | |
185 | Likely we could use the max rle value of 640 but 1024 gives some extra room. | |
186 | Also do a simple check of rlecnt>2000 since that is a reasonable minimal value to send to the session */ | |
0c792900 A |
187 | if ((rlecnt>=2000) |
188 | ||((rlecnt + ((d->cbuf_wrptr)<<2))) > (d->sample_buf_size - 1024)) { | |
189 | sr_spew("D4 preoverflow wrptr %d bufsize %d rlecnt %d\n\r",d->cbuf_wrptr,d->sample_buf_size,rlecnt); | |
190 | rle_memset(d, rlecnt); | |
191 | process_group(sdi, d, d->cbuf_wrptr); | |
192 | rlecnt=0; | |
193 | } | |
194 | ||
dbf599ec | 195 | }/*while rdptr < wrptr*/ |
ac132f83 | 196 | sr_spew("D4 while done rdptr %d", d->ser_rdptr); |
dbf599ec | 197 | /* If we reach the end of the serial input stream send any remaining values or rles to the session */ |
ac132f83 A |
198 | if (rlecnt) { |
199 | sr_spew("Residual D4 slice rlecnt %d", rlecnt); | |
200 | rle_memset(d, rlecnt); | |
201 | } | |
202 | if (d->cbuf_wrptr) { | |
203 | sr_spew("Residual D4 data wrptr %d", d->cbuf_wrptr); | |
0c792900 | 204 | process_group(sdi, d, d->cbuf_wrptr); |
ac132f83 A |
205 | |
206 | } | |
207 | ||
dbf599ec | 208 | } /* Process_D4 */ |
bac2a8b8 | 209 | |
dbf599ec A |
210 | /*Process incoming data stream and forward to trigger processing with process_group |
211 | The final value of ser_rdptr indicates how many bytes were processed. | |
212 | This version handles all other enabled channel configurations that Process_D4 doesn't */ | |
ac132f83 A |
213 | void process_slice(struct sr_dev_inst *sdi, struct dev_context *devc) |
214 | { | |
215 | int32_t i; | |
216 | uint32_t tmp32; | |
217 | uint8_t cbyte; | |
ac132f83 | 218 | uint32_t cword; |
dbf599ec A |
219 | uint32_t slice_bytes; /*number of bytes that have legal slice values including RLE |
220 | /*Only process legal data values for this mode which are 0x32-0x7F for RLE and 0x80 to 0xFF for data*/ | |
ac132f83 | 221 | for (slice_bytes = 1; (slice_bytes < devc->bytes_avail) |
0c792900 | 222 | && (devc->buffer[slice_bytes - 1] >= 0x30); slice_bytes++); |
ac132f83 A |
223 | if (slice_bytes != devc->bytes_avail) { |
224 | cbyte = devc->buffer[slice_bytes - 1]; | |
dbf599ec | 225 | slice_bytes--; /* Don't process the ending character */ |
ac132f83 A |
226 | if (cbyte == '$') { |
227 | sr_info | |
228 | ("Data stream stops with cbyte %d char %c rdidx %d sbytes %d cnt %llu", | |
229 | cbyte, cbyte, devc->ser_rdptr, slice_bytes, | |
230 | devc->byte_cnt); | |
231 | devc->rxstate = RX_STOPPED; | |
232 | } else { | |
233 | sr_err | |
234 | ("Data stream aborts with cbyte %d char %c rdidx %d sbytes %d cnt %llu", | |
235 | cbyte, cbyte, devc->ser_rdptr, slice_bytes, | |
236 | devc->byte_cnt); | |
237 | devc->rxstate = RX_ABORT; | |
238 | } | |
239 | } | |
dbf599ec | 240 | /* If the wrptr is non-zero due to a residual from the previous serial transfer don't double count it towards byte_cnt*/ |
ac132f83 | 241 | devc->byte_cnt += slice_bytes - (devc->wrptr); |
b9890a32 | 242 | sr_spew("process slice avail %d rdptr %d sb %d byte_cnt %" PRIu64 "", |
ac132f83 A |
243 | devc->bytes_avail, devc->ser_rdptr, slice_bytes, |
244 | devc->byte_cnt); | |
dbf599ec | 245 | /*Must have a full slice or one rle byte*/ |
0c792900 A |
246 | while (((devc->ser_rdptr + devc->bytes_per_slice) <= slice_bytes) |
247 | ||((devc->ser_rdptr < slice_bytes)&&(devc->buffer[devc->ser_rdptr] < 0x80))) { | |
248 | ||
249 | if(devc->buffer[devc->ser_rdptr] < 0x80){ | |
250 | int16_t rlecnt; | |
251 | if(devc->buffer[devc->ser_rdptr]<=79){ | |
252 | rlecnt=devc->buffer[devc->ser_rdptr]-47; | |
253 | }else{ | |
254 | rlecnt=(devc->buffer[devc->ser_rdptr]-78)*32; | |
255 | } | |
256 | sr_info("RLEcnt of %d in %d",rlecnt,devc->buffer[devc->ser_rdptr]); | |
257 | if((rlecnt < 1)||(rlecnt>1568)){ | |
258 | sr_err("Bad rlecnt val %d in %d",rlecnt,devc->buffer[devc->ser_rdptr]); | |
259 | }else{ | |
260 | rle_memset(devc,rlecnt); | |
261 | } | |
262 | devc->ser_rdptr++; | |
263 | ||
264 | }else{ | |
ac132f83 | 265 | cword = 0; |
dbf599ec | 266 | /* build up a word 7 bits at a time, using only enabled channels */ |
ac132f83 A |
267 | for (i = 0; i < devc->num_d_channels; i += 7) { |
268 | if (((devc->d_chan_mask) >> i) & 0x7F) { | |
269 | cword |= | |
270 | ((devc->buffer[devc->ser_rdptr]) & | |
271 | 0x7F) << i; | |
272 | (devc->ser_rdptr)++; | |
273 | } | |
274 | } | |
dbf599ec A |
275 | /*and then distribute 8 bits at a time to all possible channels |
276 | but first save of cword for rle */ | |
0c792900 A |
277 | devc->d_last[0]=cword&0xFF; |
278 | devc->d_last[1]=(cword>>8)&0xFF; | |
279 | devc->d_last[2]=(cword>>16)&0xFF; | |
280 | devc->d_last[3]=(cword>>24)&0xFF; | |
ac132f83 A |
281 | for (i = 0; i < devc->num_d_channels; i += 8) { |
282 | uint32_t idx = | |
283 | ((devc->cbuf_wrptr) * devc->dig_sample_bytes) + | |
284 | (i >> 3); | |
285 | devc->d_data_buf[idx] = cword & 0xFF; | |
286 | sr_spew | |
287 | ("Dchan i %d wrptr %d idx %d char 0x%X cword 0x%X", | |
288 | i, devc->cbuf_wrptr, idx, | |
289 | devc->d_data_buf[idx], cword); | |
290 | cword >>= 8; | |
291 | } | |
0c792900 | 292 | |
dbf599ec | 293 | /*Each analog value is one or more 7 bit values */ |
ac132f83 A |
294 | for (i = 0; i < devc->num_a_channels; i++) { |
295 | if ((devc->a_chan_mask >> i) & 1) { | |
dbf599ec | 296 | |
ac132f83 A |
297 | tmp32 = |
298 | devc->buffer[devc->ser_rdptr] - 0x80; | |
dbf599ec A |
299 | for(int a=1;a<devc->a_size;a++){ |
300 | tmp32+=(devc->buffer[(devc->ser_rdptr)+a] - 0x80)<<(7*a); | |
301 | } | |
ac132f83 A |
302 | devc->a_data_bufs[i][devc->cbuf_wrptr] = |
303 | ((float) tmp32 * devc->a_scale[i]) + | |
304 | devc->a_offset[i]; | |
305 | devc->a_last[i] = | |
306 | devc->a_data_bufs[i][devc->cbuf_wrptr]; | |
307 | sr_spew | |
308 | ("AChan %d t32 %d value %f wrptr %d rdptr %d sc %f off %f", | |
309 | i, tmp32, | |
310 | devc-> | |
311 | a_data_bufs[i][devc->cbuf_wrptr], | |
312 | devc->cbuf_wrptr, devc->ser_rdptr, | |
313 | devc->a_scale[i], devc->a_offset[i]); | |
dbf599ec A |
314 | devc->ser_rdptr+=devc->a_size; |
315 | } /*if channel enabled*/ | |
316 | } /*for num_a_channels*/ | |
ac132f83 | 317 | devc->cbuf_wrptr++; |
dbf599ec A |
318 | }/*Not an RLE */ |
319 | /*RLEs can create a large number of samples relative to the incoming serial buffer | |
320 | To prevent overflow of the sample data buffer we call process_group. | |
321 | cbuf_wrptr and sample_buf_size are both in terms of slices | |
322 | 2048 is more than needed for a max rle of 1640 on the next incoming character */ | |
0c792900 A |
323 | if((devc->cbuf_wrptr +2048) > devc->sample_buf_size){ |
324 | sr_spew("Drain large buff %d %d\n\r",devc->cbuf_wrptr,devc->sample_buf_size); | |
325 | process_group(sdi, devc, devc->cbuf_wrptr); | |
326 | ||
327 | } | |
dbf599ec | 328 | }/* While another slice or RLE available */ |
0c792900 A |
329 | if (devc->cbuf_wrptr){ |
330 | process_group(sdi, devc, devc->cbuf_wrptr); | |
ac132f83 | 331 | } |
bac2a8b8 A |
332 | |
333 | } | |
ac132f83 | 334 | |
dbf599ec | 335 | /* Send the processed analog values to the session */ |
ac132f83 A |
336 | int send_analog(struct sr_dev_inst *sdi, struct dev_context *devc, |
337 | uint32_t num_samples, uint32_t offset) | |
338 | { | |
339 | struct sr_datafeed_packet packet; | |
340 | struct sr_datafeed_analog analog; | |
341 | struct sr_analog_encoding encoding; | |
342 | struct sr_analog_meaning meaning; | |
343 | struct sr_analog_spec spec; | |
344 | struct sr_channel *ch; | |
345 | uint32_t i; | |
346 | float *fptr; | |
347 | ||
348 | sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS); | |
349 | for (i = 0; i < devc->num_a_channels; i++) { | |
350 | if ((devc->a_chan_mask >> i) & 1) { | |
351 | ch = devc->analog_groups[i]->channels->data; | |
352 | analog.meaning->channels = | |
353 | g_slist_append(NULL, ch); | |
354 | analog.num_samples = num_samples; | |
355 | analog.data = (devc->a_data_bufs[i]) + offset; | |
356 | fptr = analog.data; | |
357 | sr_spew | |
358 | ("send analog num %d offset %d first %f 2 %f", | |
359 | num_samples, offset, *(devc->a_data_bufs[i]), | |
360 | *fptr); | |
361 | analog.meaning->mq = SR_MQ_VOLTAGE; | |
362 | analog.meaning->unit = SR_UNIT_VOLT; | |
363 | analog.meaning->mqflags = 0; | |
364 | packet.type = SR_DF_ANALOG; | |
365 | packet.payload = &analog; | |
366 | sr_session_send(sdi, &packet); | |
367 | g_slist_free(analog.meaning->channels); | |
dbf599ec A |
368 | }/* if enabled */ |
369 | }/* for channels */ | |
ac132f83 | 370 | return 0; |
bac2a8b8 A |
371 | |
372 | } | |
ac132f83 | 373 | |
dbf599ec A |
374 | /*Send the ring buffer of pre-trigger analog samples. |
375 | The entire buffer is sent (as long as it filled once), but need send two payloads split at the | |
376 | the writeptr */ | |
ac132f83 A |
377 | int send_analog_ring(struct sr_dev_inst *sdi, struct dev_context *devc, |
378 | uint32_t num_samples) | |
379 | { | |
380 | struct sr_datafeed_packet packet; | |
381 | struct sr_datafeed_analog analog; | |
382 | struct sr_analog_encoding encoding; | |
383 | struct sr_analog_meaning meaning; | |
384 | struct sr_analog_spec spec; | |
385 | struct sr_channel *ch; | |
386 | int i; | |
387 | uint32_t num_pre, start_pre; | |
388 | uint32_t num_post, start_post; | |
389 | num_pre = | |
390 | (num_samples >= | |
391 | devc->pretrig_wr_ptr) ? devc->pretrig_wr_ptr : num_samples; | |
392 | start_pre = devc->pretrig_wr_ptr - num_pre; | |
393 | num_post = num_samples - num_pre; | |
394 | start_post = devc->pretrig_entries - num_post; | |
395 | sr_spew | |
396 | ("send_analog ring wrptr %u ns %d npre %u spre %u npost %u spost %u", | |
397 | devc->pretrig_wr_ptr, num_samples, num_pre, start_pre, | |
398 | num_post, start_post); | |
399 | float *fptr; | |
400 | sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS); | |
401 | for (i = 0; i < devc->num_a_channels; i++) { | |
402 | if ((devc->a_chan_mask >> i) & 1) { | |
403 | ch = devc->analog_groups[i]->channels->data; | |
404 | analog.meaning->channels = | |
405 | g_slist_append(NULL, ch); | |
406 | analog.meaning->mq = SR_MQ_VOLTAGE; | |
407 | analog.meaning->unit = SR_UNIT_VOLT; | |
408 | analog.meaning->mqflags = 0; | |
409 | packet.type = SR_DF_ANALOG; | |
410 | packet.payload = &analog; | |
dbf599ec | 411 | /*First send what is after the write pointer because it is oldest */ |
ac132f83 A |
412 | if (num_post) { |
413 | analog.num_samples = num_post; | |
414 | analog.data = | |
415 | (devc->a_pretrig_bufs[i]) + start_post; | |
ac132f83 A |
416 | for (uint32_t j = 0; |
417 | j < analog.num_samples; j++) { | |
418 | fptr = | |
419 | analog.data + | |
420 | (j * sizeof(float)); | |
ac132f83 A |
421 | } |
422 | sr_session_send(sdi, &packet); | |
423 | } | |
424 | if (num_pre) { | |
425 | analog.num_samples = num_pre; | |
426 | analog.data = | |
427 | (devc->a_pretrig_bufs[i]) + start_pre; | |
428 | sr_dbg("Sending A%d ring buffer newest ", | |
429 | i); | |
430 | for (uint32_t j = 0; | |
431 | j < analog.num_samples; j++) { | |
432 | fptr = | |
433 | analog.data + | |
434 | (j * sizeof(float)); | |
435 | sr_spew("RNGDCW%d j %d %f %p", i, | |
436 | j, *fptr, (void *) fptr); | |
437 | } | |
438 | sr_session_send(sdi, &packet); | |
439 | } | |
440 | g_slist_free(analog.meaning->channels); | |
441 | sr_dbg("Sending A%d ring buffer done ", i); | |
dbf599ec A |
442 | }/*if enabled */ |
443 | }/* for channels */ | |
ac132f83 | 444 | return 0; |
bac2a8b8 A |
445 | |
446 | } | |
447 | ||
dbf599ec A |
448 | /* Given a chunk of slices forward to trigger check or session as appropriate and update state |
449 | these could be real slices or those generated by rles */ | |
ac132f83 A |
450 | int process_group(struct sr_dev_inst *sdi, struct dev_context *devc, |
451 | uint32_t num_slices) | |
452 | { | |
453 | int trigger_offset; | |
454 | int pre_trigger_samples; | |
dbf599ec | 455 | /* These are samples sent to session and are less than num_slices if we reach limit_samples */ |
ac132f83 A |
456 | size_t num_samples; |
457 | struct sr_datafeed_logic logic; | |
458 | struct sr_datafeed_packet packet; | |
459 | int i; | |
460 | size_t cbuf_wrptr_cpy; | |
461 | cbuf_wrptr_cpy = devc->cbuf_wrptr; | |
dbf599ec A |
462 | /*regardless of whether we forward samples on or not (because we aren't triggered), always reset the |
463 | pointer into the device data buffers */ | |
ac132f83 | 464 | devc->cbuf_wrptr = 0; |
dbf599ec | 465 | if (devc->trigger_fired) { /*send directly to session */ |
ac132f83 A |
466 | if (devc->limit_samples && |
467 | num_slices > | |
468 | devc->limit_samples - devc->sent_samples) { | |
469 | num_samples = | |
470 | devc->limit_samples - devc->sent_samples; | |
471 | } else { | |
472 | num_samples = num_slices; | |
473 | } | |
474 | if (num_samples > 0) { | |
475 | sr_spew | |
476 | ("Process_group sending %d post trig samples dsb %d", | |
477 | num_samples, devc->dig_sample_bytes); | |
ac132f83 A |
478 | if (devc->num_d_channels) { |
479 | packet.type = SR_DF_LOGIC; | |
480 | packet.payload = &logic; | |
dbf599ec | 481 | /*Size the number of bytes required to fit all of the channels */ |
ac132f83 | 482 | logic.unitsize = devc->dig_sample_bytes; |
dbf599ec | 483 | /*The total length of the array sent */ |
ac132f83 A |
484 | logic.length = |
485 | num_samples * logic.unitsize; | |
486 | logic.data = devc->d_data_buf; | |
487 | sr_session_send(sdi, &packet); | |
488 | } | |
489 | send_analog(sdi, devc, num_samples, 0); | |
dbf599ec | 490 | }/*num_samples >0 */ |
ac132f83 A |
491 | devc->sent_samples += num_samples; |
492 | return 0; | |
dbf599ec | 493 | }/* trigger_fired */ |
ac132f83 A |
494 | else { |
495 | size_t num_ring_samples; | |
496 | size_t sptr; | |
497 | size_t eptr; | |
498 | size_t numtail; | |
499 | size_t numwrap; | |
500 | size_t srcptr; | |
dbf599ec A |
501 | /*The trigger_offset is -1 if no trigger is found, but if a trigger is found |
502 | then trigger_offset is the offset into the data buffer sent to it. | |
503 | The pre_trigger_samples is the total number of samples before the trigger, but limited to | |
504 | the size of the ring buffer set by the capture_ratio. So the pre_trigger_samples can include both the new samples | |
505 | and the ring buffer, but trigger_offset is only in relation to the new samples */ | |
ac132f83 A |
506 | trigger_offset = soft_trigger_logic_check(devc->stl, |
507 | devc->d_data_buf, | |
508 | num_slices * | |
509 | devc->dig_sample_bytes, | |
510 | &pre_trigger_samples); | |
dbf599ec A |
511 | /*A trigger offset >=0 indicates a trigger was seen. The stl will isue the trigger to the session |
512 | and will forward all pre trigger logic samples, but we must send any post trigger logic | |
513 | and all pre and post trigger analog signals */ | |
ac132f83 A |
514 | if (trigger_offset > -1) { |
515 | devc->trigger_fired = TRUE; | |
516 | devc->sent_samples += pre_trigger_samples; | |
517 | packet.type = SR_DF_LOGIC; | |
518 | packet.payload = &logic; | |
519 | num_samples = num_slices - trigger_offset; | |
dbf599ec A |
520 | /*Since we are in continuous mode for SW triggers it is possible to get more samples than limit_samples, so |
521 | once the trigger fires make sure we don't get beyond limit samples. At this point sent_samples should | |
522 | be equal to pre_trigger_samples (just added above) because without being triggered we'd never increment | |
523 | sent_samples. | |
524 | This number is the number of post trigger logic samples to send to the session, the number of floats | |
525 | is larger because of the analog ring buffer we track. */ | |
ac132f83 A |
526 | if (devc->limit_samples && |
527 | num_samples > | |
528 | devc->limit_samples - devc->sent_samples) | |
529 | num_samples = | |
530 | devc->limit_samples - | |
531 | devc->sent_samples; | |
dbf599ec A |
532 | /*The soft trigger logic issues the trigger and sends packest for all logic data that was pretrigger |
533 | so only send what is left */ | |
ac132f83 A |
534 | if (num_samples > 0) { |
535 | sr_dbg | |
536 | ("Sending post trigger logical remainder of %d", | |
537 | num_samples); | |
538 | logic.length = | |
539 | num_samples * devc->dig_sample_bytes; | |
540 | logic.unitsize = devc->dig_sample_bytes; | |
541 | logic.data = | |
542 | devc->d_data_buf + | |
543 | (trigger_offset * | |
544 | devc->dig_sample_bytes); | |
545 | devc->sent_samples += num_samples; | |
546 | sr_session_send(sdi, &packet); | |
547 | } | |
548 | size_t new_start, new_end, new_samples, | |
549 | ring_samples; | |
dbf599ec A |
550 | /*Figure out the analog data to send. |
551 | We might need to send: | |
552 | -some or all of incoming data | |
553 | -all of incoming data and some of ring buffer | |
554 | -all of incoming data and all of ring buffer (and still might be short) | |
555 | We don't need to compare to limit_samples because pretrig_entries can never be more than limit_samples | |
556 | trigger offset indicatese where in the new samples the trigger was, but we need to go back pretrig_entries before it */ | |
ac132f83 A |
557 | new_start = |
558 | (trigger_offset > | |
559 | (int) devc->pretrig_entries) ? trigger_offset | |
560 | - devc->pretrig_entries : 0; | |
dbf599ec A |
561 | /*Note that we might not have gotten all the pre triggerstore data we were looking for. In such a case the sw trigger |
562 | logic seems to fill up to the limit_samples and thus the ratio is off, but we get the full number of samples | |
563 | The number of entries in the ring buffer is pre_trigger_samples-trigger_offset so subtract that from limit samples | |
564 | as a threshold */ | |
ac132f83 A |
565 | new_end = |
566 | MIN(num_slices - 1, | |
567 | devc->limit_samples - | |
568 | (pre_trigger_samples - trigger_offset) - | |
569 | 1); | |
dbf599ec | 570 | /*This includes pre and post trigger storage.*/ |
ac132f83 | 571 | new_samples = new_end - new_start + 1; |
dbf599ec | 572 | /* pre_trigger_samples can never be greater than trigger_offset by more than the ring buffer depth (pretrig entries) */ |
ac132f83 A |
573 | ring_samples = |
574 | (pre_trigger_samples > | |
575 | trigger_offset) ? pre_trigger_samples - | |
576 | trigger_offset : 0; | |
577 | sr_spew | |
578 | ("SW trigger float info newstart %zu new_end %zu new_samp %zu ring_samp %zu", | |
579 | new_start, new_end, new_samples, | |
580 | ring_samples); | |
581 | if (ring_samples > 0) { | |
582 | send_analog_ring(sdi, devc, ring_samples); | |
583 | } | |
584 | if (new_samples) { | |
585 | send_analog(sdi, devc, new_samples, | |
586 | new_start); | |
587 | } | |
588 | ||
dbf599ec A |
589 | } /* if trigger_offset */ |
590 | else { /* We didn't trigger but need to copy to ring buffer */ | |
ac132f83 | 591 | if ((devc->a_chan_mask) && (devc->pretrig_entries)) { |
dbf599ec A |
592 | /*The incoming data buffer could be much larger than the ring buffer, so never copy more than |
593 | the size of the ring buffer */ | |
ac132f83 A |
594 | num_ring_samples = |
595 | num_slices > | |
596 | devc-> | |
597 | pretrig_entries ? devc->pretrig_entries | |
598 | : num_slices; | |
dbf599ec A |
599 | sptr = devc->pretrig_wr_ptr; /*starting pointer to copy to */ |
600 | /*endptr can't go past the end */ | |
ac132f83 A |
601 | eptr = |
602 | (sptr + num_ring_samples) >= | |
603 | devc-> | |
604 | pretrig_entries ? devc->pretrig_entries | |
605 | - 1 : sptr + num_ring_samples - 1; | |
dbf599ec | 606 | numtail = (eptr - sptr) + 1; /*number of samples to copy to the tail of ring buffer without wrapping */ |
ac132f83 A |
607 | numwrap = |
608 | (num_ring_samples > | |
609 | numtail) ? num_ring_samples - | |
610 | numtail : 0; | |
dbf599ec | 611 | /* cbuf_wrptr points to where the next write should go, not the actual write data */ |
ac132f83 A |
612 | srcptr = cbuf_wrptr_cpy - num_ring_samples; |
613 | sr_spew("RNG num %zu sptr %zu eptr %zu ", | |
614 | num_ring_samples, sptr, eptr); | |
ac132f83 A |
615 | for (i = 0; i < devc->num_a_channels; i++) { |
616 | if ((devc->a_chan_mask >> i) & 1) { | |
dbf599ec | 617 | /* copy tail */ |
ac132f83 A |
618 | for (uint32_t j = 0; |
619 | j < numtail; j++) { | |
620 | devc->a_pretrig_bufs | |
621 | [i][sptr + j] = | |
622 | devc->a_data_bufs | |
623 | [i] | |
624 | [srcptr + j]; | |
dbf599ec A |
625 | } |
626 | } | |
627 | } | |
628 | /* Copy wrap */ | |
ac132f83 A |
629 | srcptr += numtail; |
630 | for (i = 0; i < devc->num_a_channels; i++) { | |
631 | if ((devc->a_chan_mask >> i) & 1) { | |
632 | for (uint32_t j = 0; | |
633 | j < numwrap; j++) { | |
634 | devc->a_pretrig_bufs | |
635 | [i][j] = | |
636 | devc->a_data_bufs | |
637 | [i] | |
638 | [srcptr + j]; | |
dbf599ec A |
639 | } |
640 | } | |
641 | } | |
ac132f83 A |
642 | devc->pretrig_wr_ptr = |
643 | (numwrap) ? numwrap : (eptr + | |
644 | 1) % | |
645 | devc->pretrig_entries; | |
dbf599ec A |
646 | } /*if any analog channel enabled and pretrig_entries */ |
647 | } /*else (trigger not detected) */ | |
648 | } /*trigger not set on function entry */ | |
ac132f83 | 649 | return 0; |
dbf599ec | 650 | } /* process_group */ |
bac2a8b8 A |
651 | |
652 | ||
dbf599ec A |
653 | /*Duplicate previous sample values |
654 | This function relies on the caller to ensure d_data_buf has samples to handle the full value of the rle */ | |
ac132f83 A |
655 | void rle_memset(struct dev_context *devc, uint32_t num_slices) |
656 | { | |
0c792900 A |
657 | uint32_t j, k,didx; |
658 | sr_spew("rle_memset vals 0x%X, 0x%X, 0x%X slices %d dsb %d\n", devc->d_last[0],devc->d_last[1],devc->d_last[2], | |
ac132f83 | 659 | num_slices, devc->dig_sample_bytes); |
dbf599ec A |
660 | /* Even if a channel is disabled, PV expects the same location and size for the enabled |
661 | channels as if the channel were enabled. */ | |
ac132f83 | 662 | for (j = 0; j < num_slices; j++) { |
0c792900 | 663 | didx=devc->cbuf_wrptr*devc->dig_sample_bytes; |
ac132f83 | 664 | for (k = 0; k < devc->dig_sample_bytes; k++) { |
0c792900 | 665 | devc->d_data_buf[didx + k] = devc->d_last[k]; |
ac132f83 | 666 | } |
dbf599ec A |
667 | /* cbuf_wrptr always counts slices/samples (and not the bytes in the buffer) |
668 | regardless of mode */ | |
0c792900 | 669 | devc->cbuf_wrptr++; |
ac132f83 | 670 | } |
0c792900 | 671 | |
bac2a8b8 A |
672 | } |
673 | ||
dbf599ec A |
674 | /* This callback function is mapped from api.c with serial_source_add and is created after a capture |
675 | has been setup and is responsible for querying the device trigger status, downloading data | |
676 | and forwarding packets */ | |
bac2a8b8 | 677 | SR_PRIV int raspberrypi_pico_receive(int fd, int revents, void *cb_data) |
dc90146e | 678 | { |
ac132f83 A |
679 | struct sr_dev_inst *sdi; |
680 | struct dev_context *devc; | |
681 | struct sr_serial_dev_inst *serial; | |
682 | uint32_t i; | |
683 | int len; | |
684 | uint32_t bytes_rem; | |
685 | uint32_t residual_bytes; | |
686 | (void) fd; | |
687 | ||
688 | if (!(sdi = cb_data)) | |
689 | return TRUE; | |
690 | ||
691 | if (!(devc = sdi->priv)) | |
692 | return TRUE; | |
693 | if (devc->rxstate != RX_ACTIVE) { | |
dbf599ec A |
694 | /*This condition is normal operation and expected to happen |
695 | but printed as information */ | |
ac132f83 A |
696 | sr_dbg("Reached non active state in receive %d", |
697 | devc->rxstate); | |
dbf599ec | 698 | /*don't return - we may be waiting for a final bytecnt*/ |
ac132f83 A |
699 | } |
700 | if (devc->rxstate == RX_IDLE) { | |
dbf599ec A |
701 | /*This is the normal end condition where we do one more receive |
702 | to make sure we get the full byte_cnt */ | |
ac132f83 A |
703 | sr_dbg("Reached idle state in receive %d", devc->rxstate); |
704 | return FALSE; | |
705 | } | |
706 | ||
707 | serial = sdi->conn; | |
dbf599ec | 708 | /*return true if it is some kind of event we don't handle */ |
ac132f83 A |
709 | if (!(revents == G_IO_IN || revents == 0)) |
710 | return TRUE; | |
dbf599ec | 711 | /*Fill the buffer, note the end may have partial slices */ |
ac132f83 | 712 | bytes_rem = devc->serial_buffer_size - devc->wrptr; |
dbf599ec A |
713 | /*Read one byte less so that we can null it and print as a string |
714 | Do a small 10ms timeout, if we get nothing, we'll always come back again*/ | |
ac132f83 A |
715 | len = |
716 | serial_read_blocking(serial, &(devc->buffer[devc->wrptr]), | |
717 | bytes_rem - 1, 10); | |
718 | sr_spew("Entry wrptr %u bytes_rem %u len %d", devc->wrptr, | |
719 | bytes_rem, len); | |
720 | ||
721 | if (len > 0) { | |
722 | devc->buffer[devc->wrptr + len] = 0; | |
dbf599ec | 723 | /*Add the "#" so that spaces in the string are clearly seen */ |
ac132f83 | 724 | sr_dbg("rx string %s#", devc->buffer); |
ac132f83 A |
725 | devc->bytes_avail = (devc->wrptr + len); |
726 | sr_spew | |
727 | ("rx len %d bytes_avail %ul sent_samples %ul wrptr %u", | |
728 | len, devc->bytes_avail, devc->sent_samples, | |
729 | devc->wrptr); | |
ac132f83 A |
730 | } else if (len == 0) { |
731 | return TRUE; | |
732 | } else { | |
733 | sr_err("ERROR:Negative serial read code %d", len); | |
734 | sdi->driver->dev_acquisition_stop(sdi); | |
735 | return FALSE; | |
dbf599ec | 736 | }/* if len>0 */ |
ac132f83 | 737 | |
dbf599ec | 738 | /* Process the serial read data */ |
ac132f83 A |
739 | devc->ser_rdptr = 0; |
740 | if (devc->rxstate == RX_ACTIVE) { | |
741 | if ((devc->a_chan_mask == 0) | |
742 | && ((devc->d_chan_mask & 0xFFFFFFF0) == 0)) { | |
743 | process_D4(sdi, devc); | |
744 | } else { | |
745 | process_slice(sdi, devc); | |
746 | } | |
747 | } | |
dbf599ec A |
748 | /*process_slice/process_D4 increment ser_rdptr as bytes of the serial buffer are used |
749 | But they may not use all of it, and thus the residual unused bytes are shifted to the start of the buffer | |
750 | for the next call. */ | |
ac132f83 | 751 | residual_bytes = devc->bytes_avail - devc->ser_rdptr; |
ac132f83 A |
752 | if (residual_bytes) { |
753 | for (i = 0; i < residual_bytes; i++) { | |
754 | devc->buffer[i] = | |
755 | devc->buffer[i + devc->ser_rdptr]; | |
756 | } | |
757 | devc->ser_rdptr = 0; | |
758 | devc->wrptr = residual_bytes; | |
759 | sr_spew("Residual shift rdptr %u wrptr %u", | |
760 | devc->ser_rdptr, devc->wrptr); | |
761 | } else { | |
dbf599ec | 762 | /* If there are no residuals shifted then zero the wrptr since all data is used */ |
ac132f83 A |
763 | devc->wrptr = 0; |
764 | } | |
dbf599ec | 765 | /*ABORT ends immediately */ |
ac132f83 A |
766 | if (devc->rxstate == RX_ABORT) { |
767 | sr_err("Ending receive on abort"); | |
768 | sdi->driver->dev_acquisition_stop(sdi); | |
dbf599ec | 769 | return FALSE; |
ac132f83 | 770 | } |
dbf599ec | 771 | /*if stopped, look for final '+' indicating the full byte_cnt is received */ |
ac132f83 A |
772 | if (devc->rxstate == RX_STOPPED) { |
773 | sr_dbg("Stopped, checking byte_cnt"); | |
774 | if (devc->buffer[0] != '$') { | |
dbf599ec A |
775 | /*If this happens it means that we got a set of data that was not processed as |
776 | whole groups of slice bytes. So either we lost data or are not parsing it correctly. */ | |
ac132f83 A |
777 | sr_err("ERROR: Stop marker should be byte zero"); |
778 | devc->rxstate = RX_ABORT; | |
779 | sdi->driver->dev_acquisition_stop(sdi); | |
780 | return FALSE; | |
781 | } | |
782 | for (i = 1; i < devc->wrptr; i++) { | |
783 | if (devc->buffer[i] == '+') { | |
784 | devc->buffer[i] = 0; | |
785 | uint64_t rxbytecnt; | |
786 | rxbytecnt = atol((char *)&(devc->buffer[1])); | |
787 | sr_dbg | |
788 | ("Byte_cnt check device cnt %llu host cnt %llu", | |
789 | rxbytecnt, devc->byte_cnt); | |
790 | if (rxbytecnt != devc->byte_cnt) { | |
791 | sr_err | |
792 | ("ERROR: received %llu and counted %llu bytecnts don't match, data may be lost", | |
793 | rxbytecnt, devc->byte_cnt); | |
794 | } | |
dbf599ec | 795 | /* Since we got the bytecnt we know the device is done sending data */ |
ac132f83 | 796 | devc->rxstate = RX_IDLE; |
dbf599ec | 797 | /* We must always call acquisition_stop on all completed runs */ |
ac132f83 A |
798 | sdi->driver->dev_acquisition_stop(sdi); |
799 | return TRUE; | |
800 | } | |
801 | } | |
dbf599ec | 802 | /*It's possible we need one more serial transfer to get the byte_cnt, so print that here */ |
ac132f83 | 803 | sr_dbg("Haven't seen byte_cnt + yet"); |
dbf599ec A |
804 | } /*if RX_STOPPED*/ |
805 | /*If at the sample limit, send a "+" in case we are in continuous mode and need | |
806 | to stop the device. Not that even in non continous mode there might be cases where get an extra | |
807 | sample or two... */ | |
ac132f83 A |
808 | |
809 | if ((devc->sent_samples >= devc->limit_samples) | |
810 | && (devc->rxstate == RX_ACTIVE)) { | |
811 | sr_dbg | |
812 | ("Ending: sent %u of limit %llu samples byte_cnt %llu", | |
813 | devc->sent_samples, devc->limit_samples, | |
814 | devc->byte_cnt); | |
815 | send_serial_char(serial, '+'); | |
816 | ||
817 | } | |
818 | sr_spew | |
819 | ("Receive function done: sent %u limit %llu wrptr %u len %d", | |
820 | devc->sent_samples, devc->limit_samples, devc->wrptr, len); | |
821 | return TRUE; | |
dbf599ec | 822 | }/* raspberrypi_pico_receive */ |
bac2a8b8 | 823 | |
dbf599ec | 824 | /* Read device specific information from the device */ |
bac2a8b8 A |
825 | SR_PRIV int raspberrypi_pico_get_dev_cfg(const struct sr_dev_inst *sdi) |
826 | { | |
ac132f83 A |
827 | struct dev_context *devc; |
828 | struct sr_serial_dev_inst *serial; | |
829 | char *cmd, response[20]; | |
830 | gchar **tokens; | |
831 | unsigned int i; | |
832 | int ret, num_tokens; | |
833 | ||
834 | devc = sdi->priv; | |
835 | sr_dbg("At get_dev_cfg"); | |
836 | serial = sdi->conn; | |
837 | for (i = 0; i < devc->num_a_channels; i++) { | |
838 | cmd = g_strdup_printf("a%d\n", i); | |
839 | ret = send_serial_w_resp(serial, cmd, response, 20); | |
840 | if (ret <= 0) { | |
841 | sr_err | |
842 | ("ERROR:No response from device for analog channel query"); | |
843 | return SR_ERR; | |
844 | } | |
ac132f83 A |
845 | response[ret] = 0; |
846 | tokens = NULL; | |
847 | tokens = g_strsplit(response, "x", 0); | |
848 | num_tokens = g_strv_length(tokens); | |
849 | if (num_tokens == 2) { | |
850 | devc->a_scale[i] = | |
851 | ((float) atoi(tokens[0])) / 1000000.0; | |
852 | devc->a_offset[i] = | |
853 | ((float) atoi(tokens[1])) / 1000000.0; | |
854 | sr_dbg | |
855 | ("A%d scale %f offset %f response #%s# tokens #%s# #%s#\n", | |
856 | i, devc->a_scale[i], devc->a_offset[i], | |
857 | response, tokens[0], tokens[1]); | |
858 | } else { | |
859 | sr_err | |
860 | ("ERROR:Ascale read c%d got unparseable response %s tokens %d", | |
861 | i, response, num_tokens); | |
dbf599ec | 862 | /*force a legal fixed value assuming a 3.3V scale */ |
ac132f83 A |
863 | devc->a_scale[i] = 0.0257; |
864 | devc->a_offset[i] = 0.0; | |
865 | } | |
866 | g_strfreev(tokens); | |
867 | g_free(cmd); | |
868 | } | |
ac132f83 | 869 | return SR_OK; |
ac132f83 | 870 | } |