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8fa9368e BV |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
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 | ||
e37c4b39 | 20 | #include <string.h> |
8fa9368e BV |
21 | #include "protocol.h" |
22 | ||
e37c4b39 BV |
23 | /* Length of expected payload for each token. */ |
24 | static int token_payloads[][2] = { | |
25 | { TOKEN_WEIGHT_TIME_FAST, 0 }, | |
26 | { TOKEN_WEIGHT_TIME_SLOW, 0 }, | |
27 | { TOKEN_HOLD_MAX, 0 }, | |
28 | { TOKEN_HOLD_MIN, 0 }, | |
29 | { TOKEN_TIME, 3 }, | |
30 | { TOKEN_MEAS_RANGE_OVER, 0 }, | |
31 | { TOKEN_MEAS_RANGE_UNDER, 0 }, | |
32 | { TOKEN_STORE_FULL, 0 }, | |
33 | { TOKEN_RECORDING_ON, 0 }, | |
34 | { TOKEN_MEAS_WAS_READOUT, 1 }, | |
35 | { TOKEN_MEAS_WAS_BARGRAPH, 0 }, | |
36 | { TOKEN_MEASUREMENT, 2 }, | |
37 | { TOKEN_HOLD_NONE, 0 }, | |
38 | { TOKEN_BATTERY_LOW, 0 }, | |
39 | { TOKEN_MEAS_RANGE_OK, 0 }, | |
40 | { TOKEN_STORE_OK, 0 }, | |
41 | { TOKEN_RECORDING_OFF, 0 }, | |
42 | { TOKEN_WEIGHT_FREQ_A, 1 }, | |
43 | { TOKEN_WEIGHT_FREQ_C, 1 }, | |
44 | { TOKEN_BATTERY_OK, 0 }, | |
45 | { TOKEN_MEAS_RANGE_30_80, 0 }, | |
46 | { TOKEN_MEAS_RANGE_30_130, 0 }, | |
47 | { TOKEN_MEAS_RANGE_50_100, 0 }, | |
48 | { TOKEN_MEAS_RANGE_80_130, 0 }, | |
49 | }; | |
50 | ||
51 | static int find_token_payload_len(unsigned char c) | |
8fa9368e | 52 | { |
e37c4b39 | 53 | unsigned int i; |
8fa9368e | 54 | |
e37c4b39 BV |
55 | for (i = 0; i < ARRAY_SIZE(token_payloads); i++) { |
56 | if (token_payloads[i][0] == c) | |
57 | return token_payloads[i][1]; | |
58 | } | |
59 | ||
60 | return -1; | |
61 | } | |
62 | ||
63 | /* Process measurement or setting (0xa5 command). */ | |
64 | static void process_mset(const struct sr_dev_inst *sdi) | |
65 | { | |
8fa9368e | 66 | struct dev_context *devc; |
e37c4b39 BV |
67 | struct sr_datafeed_packet packet; |
68 | struct sr_datafeed_analog analog; | |
69 | GString *dbg; | |
70 | float fvalue; | |
71 | int i; | |
8fa9368e | 72 | |
e37c4b39 BV |
73 | devc = sdi->priv; |
74 | if (sr_log_loglevel_get() >= SR_LOG_SPEW) { | |
75 | dbg = g_string_sized_new(128); | |
76 | g_string_printf(dbg, "got command 0x%.2x token 0x%.2x", | |
77 | devc->cmd, devc->token); | |
78 | if (devc->buf_len) { | |
79 | g_string_append_printf(dbg, " payload"); | |
80 | for (i = 0; i < devc->buf_len; i++) | |
81 | g_string_append_printf(dbg, " %.2x", devc->buf[i]); | |
82 | } | |
83 | sr_spew("%s", dbg->str); | |
84 | g_string_free(dbg, TRUE); | |
85 | } | |
86 | ||
87 | switch(devc->token) { | |
88 | case TOKEN_WEIGHT_TIME_FAST: | |
89 | devc->cur_mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_F; | |
90 | devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_S; | |
91 | break; | |
92 | case TOKEN_WEIGHT_TIME_SLOW: | |
93 | devc->cur_mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_S; | |
94 | devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_F; | |
95 | break; | |
96 | case TOKEN_WEIGHT_FREQ_A: | |
97 | devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A; | |
98 | devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C; | |
99 | break; | |
100 | case TOKEN_WEIGHT_FREQ_C: | |
101 | devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C; | |
102 | devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A; | |
103 | break; | |
104 | case TOKEN_HOLD_MAX: | |
105 | devc->cur_mqflags |= SR_MQFLAG_HOLD | SR_MQFLAG_MAX; | |
106 | devc->cur_mqflags &= ~SR_MQFLAG_MIN; | |
107 | break; | |
108 | case TOKEN_HOLD_MIN: | |
109 | devc->cur_mqflags |= SR_MQFLAG_HOLD | SR_MQFLAG_MIN; | |
110 | devc->cur_mqflags &= ~SR_MQFLAG_MAX; | |
111 | break; | |
112 | case TOKEN_HOLD_NONE: | |
113 | devc->cur_mqflags &= ~(SR_MQFLAG_MAX | SR_MQFLAG_MIN | SR_MQFLAG_HOLD); | |
114 | break; | |
115 | case TOKEN_MEASUREMENT: | |
116 | fvalue = ((devc->buf[0] & 0xf0) >> 4) * 100; | |
117 | fvalue += (devc->buf[0] & 0x0f) * 10; | |
118 | fvalue += ((devc->buf[1] & 0xf0) >> 4); | |
119 | fvalue += (devc->buf[1] & 0x0f) / 10.0; | |
bc114328 BV |
120 | devc->last_spl = fvalue; |
121 | break; | |
122 | case TOKEN_MEAS_WAS_READOUT: | |
123 | case TOKEN_MEAS_WAS_BARGRAPH: | |
124 | if (devc->cur_mqflags & (SR_MQFLAG_MAX | SR_MQFLAG_MIN)) { | |
125 | if (devc->token == TOKEN_MEAS_WAS_BARGRAPH) { | |
126 | /* The device still sends bargraph measurements even | |
127 | * when in max/min hold mode. Suppress them here, unless | |
128 | * they're readout values. This duplicates the behavior | |
129 | * of the device display exactly. */ | |
130 | break; | |
131 | } | |
132 | } | |
e37c4b39 BV |
133 | memset(&analog, 0, sizeof(struct sr_datafeed_analog)); |
134 | analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL; | |
135 | analog.mqflags = devc->cur_mqflags; | |
136 | analog.unit = SR_UNIT_DECIBEL_SPL; | |
137 | analog.probes = sdi->probes; | |
138 | analog.num_samples = 1; | |
bc114328 | 139 | analog.data = &devc->last_spl; |
e37c4b39 BV |
140 | packet.type = SR_DF_ANALOG; |
141 | packet.payload = &analog; | |
142 | sr_session_send(devc->cb_data, &packet); | |
143 | ||
144 | devc->num_samples++; | |
145 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) | |
146 | sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi, | |
147 | devc->cb_data); | |
148 | break; | |
149 | case TOKEN_TIME: | |
150 | case TOKEN_STORE_OK: | |
151 | case TOKEN_STORE_FULL: | |
152 | case TOKEN_RECORDING_ON: | |
153 | case TOKEN_RECORDING_OFF: | |
e37c4b39 BV |
154 | case TOKEN_BATTERY_OK: |
155 | case TOKEN_BATTERY_LOW: | |
156 | case TOKEN_MEAS_RANGE_OK: | |
157 | case TOKEN_MEAS_RANGE_OVER: | |
158 | case TOKEN_MEAS_RANGE_UNDER: | |
159 | case TOKEN_MEAS_RANGE_30_80: | |
160 | case TOKEN_MEAS_RANGE_30_130: | |
161 | case TOKEN_MEAS_RANGE_50_100: | |
162 | case TOKEN_MEAS_RANGE_80_130: | |
163 | /* Not useful, or not expressable in sigrok. */ | |
164 | break; | |
165 | } | |
166 | ||
167 | } | |
168 | ||
169 | static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c) | |
170 | { | |
171 | struct dev_context *devc; | |
172 | int len; | |
8fa9368e BV |
173 | |
174 | if (!(devc = sdi->priv)) | |
e37c4b39 BV |
175 | return; |
176 | ||
177 | if (c == 0xff) { | |
178 | /* Device is in hold mode */ | |
179 | devc->cur_mqflags |= SR_MQFLAG_HOLD; | |
180 | ||
181 | /* TODO: send out the last measurement at the same | |
182 | * rate as it normally gets sent */ | |
183 | ||
184 | /* When the device leaves hold mode, it starts from scratch. */ | |
185 | devc->state = ST_INIT; | |
186 | return; | |
187 | } | |
188 | devc->cur_mqflags &= ~SR_MQFLAG_HOLD; | |
189 | ||
190 | if (devc->state == ST_INIT) { | |
191 | if (c == 0xa5) { | |
192 | devc->cmd = c; | |
193 | devc->token = 0x00; | |
194 | devc->state = ST_GET_TOKEN; | |
195 | } else if (c == 0xbb) { | |
196 | devc->cmd = c; | |
197 | devc->buf_len = 0; | |
198 | devc->state = ST_GET_LOG; | |
199 | } | |
200 | } else if (devc->state == ST_GET_TOKEN) { | |
201 | devc->token = c; | |
202 | devc->buf_len = 0; | |
203 | len = find_token_payload_len(devc->token); | |
204 | if (len == -1 || len > 0) { | |
205 | devc->buf_len = 0; | |
206 | devc->state = ST_GET_DATA; | |
207 | } else { | |
208 | process_mset(sdi); | |
209 | devc->state = ST_INIT; | |
210 | } | |
211 | } else if (devc->state == ST_GET_DATA) { | |
212 | len = find_token_payload_len(devc->token); | |
213 | if (len == -1) { | |
214 | /* We don't know this token. */ | |
215 | sr_dbg("Unknown 0xa5 token 0x%.2x", devc->token); | |
216 | if (c == 0xa5 || c == 0xbb) { | |
217 | /* Looks like a new command however. */ | |
218 | process_mset(sdi); | |
219 | devc->state = ST_INIT; | |
220 | } else { | |
221 | devc->buf[devc->buf_len++] = c; | |
222 | if (devc->buf_len > BUF_SIZE) { | |
223 | /* Shouldn't happen, ignore. */ | |
224 | devc->state = ST_INIT; | |
225 | } | |
226 | } | |
227 | } else { | |
228 | devc->buf[devc->buf_len++] = c; | |
229 | if (devc->buf_len == len) { | |
230 | process_mset(sdi); | |
231 | devc->state = ST_INIT; | |
232 | } else if (devc->buf_len > BUF_SIZE) { | |
233 | /* Shouldn't happen, ignore. */ | |
234 | devc->state = ST_INIT; | |
235 | } | |
236 | } | |
237 | } else if (devc->state == ST_GET_LOG) { | |
238 | } | |
239 | ||
240 | } | |
241 | ||
242 | SR_PRIV int cem_dt_885x_receive_data(int fd, int revents, void *cb_data) | |
243 | { | |
244 | const struct sr_dev_inst *sdi; | |
245 | struct sr_serial_dev_inst *serial; | |
246 | unsigned char c; | |
247 | ||
248 | (void)fd; | |
249 | ||
250 | if (!(sdi = cb_data)) | |
8fa9368e BV |
251 | return TRUE; |
252 | ||
e37c4b39 | 253 | serial = sdi->conn; |
8fa9368e | 254 | if (revents == G_IO_IN) { |
e37c4b39 BV |
255 | if (serial_read(serial, &c, 1) != 1) |
256 | return TRUE; | |
257 | process_byte(sdi, c); | |
8fa9368e BV |
258 | } |
259 | ||
260 | return TRUE; | |
261 | } |