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5e7a8e57 AJ |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Aurelien Jacobs <aurel@gnuage.org> | |
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 | */ | |
19 | ||
6ec6c43b | 20 | #include <config.h> |
81a9ab72 AJ |
21 | #include <string.h> |
22 | #include <math.h> | |
5e7a8e57 AJ |
23 | #include "protocol.h" |
24 | ||
81a9ab72 AJ |
25 | typedef enum { |
26 | LIVE_DATA = 0x00, | |
27 | LOG_METADATA = 0x11, | |
28 | LOG_DATA = 0x14, | |
29 | LOG_START = 0x18, | |
30 | LOG_END = 0x19, | |
9ee78f23 | 31 | } packet_type; |
81a9ab72 AJ |
32 | |
33 | static gboolean appa_55ii_checksum(const uint8_t *buf) | |
34 | { | |
7574e58c BV |
35 | int i, size, checksum; |
36 | ||
37 | size = buf[3] + 4; | |
38 | checksum = 0; | |
39 | for (i = 0; i < size; i++) | |
81a9ab72 | 40 | checksum += buf[i]; |
7574e58c | 41 | |
81a9ab72 AJ |
42 | return buf[size] == (checksum & 0xFF); |
43 | } | |
44 | ||
45 | SR_PRIV gboolean appa_55ii_packet_valid(const uint8_t *buf) | |
46 | { | |
47 | if (buf[0] == 0x55 && buf[1] == 0x55 && buf[3] <= 32 | |
7574e58c | 48 | && appa_55ii_checksum(buf)) |
81a9ab72 | 49 | return TRUE; |
7574e58c | 50 | |
81a9ab72 AJ |
51 | return FALSE; |
52 | } | |
53 | ||
54 | static uint64_t appa_55ii_flags(const uint8_t *buf) | |
55 | { | |
7574e58c BV |
56 | uint8_t disp_mode; |
57 | uint64_t flags; | |
58 | ||
59 | disp_mode = buf[4 + 13]; | |
60 | flags = 0; | |
61 | if ((disp_mode & 0xF0) == 0x20) | |
62 | flags |= SR_MQFLAG_HOLD; | |
63 | if ((disp_mode & 0x0C) == 0x04) | |
64 | flags |= SR_MQFLAG_MAX; | |
65 | if ((disp_mode & 0x0C) == 0x08) | |
66 | flags |= SR_MQFLAG_MIN; | |
67 | if ((disp_mode & 0x0C) == 0x0C) | |
68 | flags |= SR_MQFLAG_AVG; | |
81a9ab72 AJ |
69 | |
70 | return flags; | |
71 | } | |
72 | ||
ba7dd8bb | 73 | static float appa_55ii_temp(const uint8_t *buf, int ch) |
81a9ab72 | 74 | { |
7574e58c BV |
75 | const uint8_t *ptr; |
76 | int16_t temp; | |
77 | uint8_t flags; | |
78 | ||
ba7dd8bb | 79 | ptr = buf + 4 + 14 + 3 * ch; |
7574e58c BV |
80 | temp = RL16(ptr); |
81 | flags = ptr[2]; | |
82 | ||
83 | if (flags & 0x60) | |
84 | return INFINITY; | |
85 | else if (flags & 1) | |
86 | return (float)temp / 10; | |
87 | else | |
88 | return (float)temp; | |
81a9ab72 AJ |
89 | } |
90 | ||
91 | static void appa_55ii_live_data(struct sr_dev_inst *sdi, const uint8_t *buf) | |
92 | { | |
76b4d4f4 | 93 | struct dev_context *devc; |
81a9ab72 | 94 | struct sr_datafeed_packet packet; |
5faebab2 | 95 | struct sr_datafeed_analog_old analog; |
ba7dd8bb | 96 | struct sr_channel *ch; |
3f239f08 | 97 | float values[APPA_55II_NUM_CHANNELS], *val_ptr; |
81a9ab72 AJ |
98 | int i; |
99 | ||
76b4d4f4 UH |
100 | devc = sdi->priv; |
101 | ||
81a9ab72 AJ |
102 | if (devc->data_source != DATA_SOURCE_LIVE) |
103 | return; | |
104 | ||
7574e58c | 105 | val_ptr = values; |
5faebab2 | 106 | memset(&analog, 0, sizeof(struct sr_datafeed_analog_old)); |
81a9ab72 AJ |
107 | analog.num_samples = 1; |
108 | analog.mq = SR_MQ_TEMPERATURE; | |
109 | analog.unit = SR_UNIT_CELSIUS; | |
110 | analog.mqflags = appa_55ii_flags(buf); | |
111 | analog.data = values; | |
112 | ||
3f239f08 | 113 | for (i = 0; i < APPA_55II_NUM_CHANNELS; i++) { |
ba7dd8bb UH |
114 | ch = g_slist_nth_data(sdi->channels, i); |
115 | if (!ch->enabled) | |
81a9ab72 | 116 | continue; |
ba7dd8bb | 117 | analog.channels = g_slist_append(analog.channels, ch); |
81a9ab72 AJ |
118 | *val_ptr++ = appa_55ii_temp(buf, i); |
119 | } | |
120 | ||
5faebab2 | 121 | packet.type = SR_DF_ANALOG_OLD; |
81a9ab72 | 122 | packet.payload = &analog; |
695dc859 | 123 | sr_session_send(sdi, &packet); |
ba7dd8bb | 124 | g_slist_free(analog.channels); |
81a9ab72 AJ |
125 | |
126 | devc->num_samples++; | |
127 | } | |
128 | ||
129 | static void appa_55ii_log_metadata(struct sr_dev_inst *sdi, const uint8_t *buf) | |
130 | { | |
7574e58c BV |
131 | struct dev_context *devc; |
132 | ||
133 | devc = sdi->priv; | |
81a9ab72 AJ |
134 | devc->num_log_records = (buf[5] << 8) + buf[4]; |
135 | } | |
136 | ||
137 | static void appa_55ii_log_data_parse(struct sr_dev_inst *sdi) | |
138 | { | |
7574e58c BV |
139 | struct dev_context *devc; |
140 | struct sr_datafeed_packet packet; | |
5faebab2 | 141 | struct sr_datafeed_analog_old analog; |
ba7dd8bb | 142 | struct sr_channel *ch; |
3f239f08 | 143 | float values[APPA_55II_NUM_CHANNELS], *val_ptr; |
7574e58c BV |
144 | const uint8_t *buf; |
145 | int16_t temp; | |
146 | int offset, i; | |
147 | ||
148 | devc = sdi->priv; | |
149 | offset = 0; | |
81a9ab72 AJ |
150 | |
151 | while (devc->log_buf_len >= 20 && devc->num_log_records > 0) { | |
7574e58c BV |
152 | buf = devc->log_buf + offset; |
153 | val_ptr = values; | |
81a9ab72 | 154 | |
76b4d4f4 | 155 | /* FIXME: Timestamp should be sent in the packet. */ |
81a9ab72 AJ |
156 | sr_dbg("Timestamp: %02d:%02d:%02d", buf[2], buf[3], buf[4]); |
157 | ||
5faebab2 | 158 | memset(&analog, 0, sizeof(struct sr_datafeed_analog_old)); |
81a9ab72 AJ |
159 | analog.num_samples = 1; |
160 | analog.mq = SR_MQ_TEMPERATURE; | |
161 | analog.unit = SR_UNIT_CELSIUS; | |
162 | analog.data = values; | |
163 | ||
3f239f08 | 164 | for (i = 0; i < APPA_55II_NUM_CHANNELS; i++) { |
7574e58c | 165 | temp = RL16(buf + 12 + 2 * i); |
ba7dd8bb UH |
166 | ch = g_slist_nth_data(sdi->channels, i); |
167 | if (!ch->enabled) | |
81a9ab72 | 168 | continue; |
ba7dd8bb | 169 | analog.channels = g_slist_append(analog.channels, ch); |
81a9ab72 AJ |
170 | *val_ptr++ = temp == 0x7FFF ? INFINITY : (float)temp / 10; |
171 | } | |
172 | ||
5faebab2 | 173 | packet.type = SR_DF_ANALOG_OLD; |
81a9ab72 | 174 | packet.payload = &analog; |
695dc859 | 175 | sr_session_send(sdi, &packet); |
ba7dd8bb | 176 | g_slist_free(analog.channels); |
81a9ab72 AJ |
177 | |
178 | devc->num_samples++; | |
179 | devc->log_buf_len -= 20; | |
180 | offset += 20; | |
181 | devc->num_log_records--; | |
182 | } | |
183 | ||
184 | memmove(devc->log_buf, devc->log_buf + offset, devc->log_buf_len); | |
185 | } | |
186 | ||
187 | static void appa_55ii_log_data(struct sr_dev_inst *sdi, const uint8_t *buf) | |
188 | { | |
7574e58c BV |
189 | struct dev_context *devc; |
190 | const uint8_t *ptr; | |
191 | unsigned int size; | |
192 | int s; | |
81a9ab72 | 193 | |
7574e58c | 194 | devc = sdi->priv; |
81a9ab72 AJ |
195 | if (devc->data_source != DATA_SOURCE_MEMORY) |
196 | return; | |
197 | ||
76b4d4f4 | 198 | ptr = buf + 4; |
7574e58c | 199 | size = buf[3]; |
81a9ab72 | 200 | while (size > 0) { |
7574e58c | 201 | s = MIN(size, sizeof(devc->log_buf) - devc->log_buf_len); |
81a9ab72 AJ |
202 | memcpy(devc->log_buf + devc->log_buf_len, ptr, s); |
203 | devc->log_buf_len += s; | |
204 | size -= s; | |
205 | ptr += s; | |
206 | ||
207 | appa_55ii_log_data_parse(sdi); | |
208 | } | |
209 | } | |
210 | ||
211 | static void appa_55ii_log_end(struct sr_dev_inst *sdi) | |
212 | { | |
7574e58c | 213 | struct dev_context *devc; |
81a9ab72 | 214 | |
7574e58c | 215 | devc = sdi->priv; |
81a9ab72 AJ |
216 | if (devc->data_source != DATA_SOURCE_MEMORY) |
217 | return; | |
218 | ||
695dc859 | 219 | sdi->driver->dev_acquisition_stop(sdi); |
81a9ab72 AJ |
220 | } |
221 | ||
222 | static const uint8_t *appa_55ii_parse_data(struct sr_dev_inst *sdi, | |
7574e58c | 223 | const uint8_t *buf, int len) |
81a9ab72 AJ |
224 | { |
225 | if (len < 5) | |
7574e58c BV |
226 | /* Need more data. */ |
227 | return NULL; | |
81a9ab72 AJ |
228 | |
229 | if (buf[0] != 0x55 || buf[1] != 0x55) | |
7574e58c BV |
230 | /* Try to re-synchronize on a packet start. */ |
231 | return buf + 1; | |
81a9ab72 | 232 | |
7574e58c BV |
233 | if (len < 5 + buf[3]) |
234 | /* Need more data. */ | |
235 | return NULL; | |
81a9ab72 AJ |
236 | |
237 | if (!appa_55ii_checksum(buf)) | |
7574e58c BV |
238 | /* Skip broken packet. */ |
239 | return buf + 4 + buf[3] + 1; | |
81a9ab72 | 240 | |
9ee78f23 | 241 | switch ((packet_type)buf[2]) { |
7574e58c BV |
242 | case LIVE_DATA: |
243 | appa_55ii_live_data(sdi, buf); | |
244 | break; | |
245 | case LOG_METADATA: | |
246 | appa_55ii_log_metadata(sdi, buf); | |
247 | break; | |
248 | case LOG_DATA: | |
249 | appa_55ii_log_data(sdi, buf); | |
250 | break; | |
251 | case LOG_START: | |
252 | break; | |
253 | case LOG_END: | |
254 | appa_55ii_log_end(sdi); | |
255 | break; | |
76b4d4f4 UH |
256 | default: |
257 | sr_warn("Invalid packet type: 0x%02x.", buf[2]); | |
258 | break; | |
81a9ab72 AJ |
259 | } |
260 | ||
261 | return buf + 4 + buf[3] + 1; | |
262 | } | |
263 | ||
5e7a8e57 AJ |
264 | SR_PRIV int appa_55ii_receive_data(int fd, int revents, void *cb_data) |
265 | { | |
81a9ab72 | 266 | struct sr_dev_inst *sdi; |
5e7a8e57 | 267 | struct dev_context *devc; |
81a9ab72 | 268 | struct sr_serial_dev_inst *serial; |
7574e58c | 269 | int64_t time; |
81a9ab72 AJ |
270 | const uint8_t *ptr, *next_ptr, *end_ptr; |
271 | int len; | |
5e7a8e57 AJ |
272 | |
273 | (void)fd; | |
274 | ||
81a9ab72 | 275 | if (!(sdi = cb_data) || !(devc = sdi->priv) || revents != G_IO_IN) |
5e7a8e57 | 276 | return TRUE; |
81a9ab72 AJ |
277 | serial = sdi->conn; |
278 | ||
279 | /* Try to get as much data as the buffer can hold. */ | |
280 | len = sizeof(devc->buf) - devc->buf_len; | |
25dd0831 | 281 | len = serial_read_nonblocking(serial, devc->buf + devc->buf_len, len); |
81a9ab72 AJ |
282 | if (len < 1) { |
283 | sr_err("Serial port read error: %d.", len); | |
284 | return FALSE; | |
285 | } | |
286 | devc->buf_len += len; | |
287 | ||
288 | /* Now look for packets in that data. */ | |
289 | ptr = devc->buf; | |
290 | end_ptr = ptr + devc->buf_len; | |
291 | while ((next_ptr = appa_55ii_parse_data(sdi, ptr, end_ptr - ptr))) | |
292 | ptr = next_ptr; | |
5e7a8e57 | 293 | |
81a9ab72 AJ |
294 | /* If we have any data left, move it to the beginning of our buffer. */ |
295 | memmove(devc->buf, ptr, end_ptr - ptr); | |
296 | devc->buf_len -= ptr - devc->buf; | |
297 | ||
298 | /* If buffer is full and no valid packet was found, wipe buffer. */ | |
299 | if (devc->buf_len >= sizeof(devc->buf)) { | |
300 | devc->buf_len = 0; | |
301 | return FALSE; | |
302 | } | |
303 | ||
304 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) { | |
305 | sr_info("Requested number of samples reached."); | |
695dc859 | 306 | sdi->driver->dev_acquisition_stop(sdi); |
5e7a8e57 | 307 | return TRUE; |
81a9ab72 | 308 | } |
5e7a8e57 | 309 | |
81a9ab72 | 310 | if (devc->limit_msec) { |
7574e58c | 311 | time = (g_get_monotonic_time() - devc->start_time) / 1000; |
81a9ab72 AJ |
312 | if (time > (int64_t)devc->limit_msec) { |
313 | sr_info("Requested time limit reached."); | |
695dc859 | 314 | sdi->driver->dev_acquisition_stop(sdi); |
81a9ab72 AJ |
315 | return TRUE; |
316 | } | |
5e7a8e57 AJ |
317 | } |
318 | ||
319 | return TRUE; | |
320 | } |