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Always interleave analog data with all enabled probes.
[libsigrok.git] / hardware / serial-dmm / protocol.c
1 /*
2  * This file is part of the sigrok project.
3  *
4  * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
5  * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
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 3 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, see <http://www.gnu.org/licenses/>.
19  */
20
21 #include <stdlib.h>
22 #include <math.h>
23 #include <string.h>
24 #include <errno.h>
25 #include <glib.h>
26 #include "libsigrok.h"
27 #include "libsigrok-internal.h"
28 #include "protocol.h"
29
30 static void log_dmm_packet(const uint8_t *buf)
31 {
32         sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x"
33                " %02x %02x %02x %02x %02x %02x %02x",
34                buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
35                buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13]);
36 }
37
38 SR_PRIV void dmm_details_dt4000zc(struct sr_datafeed_analog *analog, void *info)
39 {
40         dmm_details_tp4000zc(analog, info); /* Same as TP4000ZC. */
41 }
42
43 SR_PRIV void dmm_details_tp4000zc(struct sr_datafeed_analog *analog, void *info)
44 {
45         struct fs9721_info *info_local;
46
47         info_local = (struct fs9721_info *)info;
48
49         /* User-defined FS9721_LP3 flag 'c2c1_10' means temperature. */
50         if (info_local->is_c2c1_10) {
51                 analog->mq = SR_MQ_TEMPERATURE;
52                 analog->unit = SR_UNIT_CELSIUS;
53         }
54 }
55
56 SR_PRIV void dmm_details_va18b(struct sr_datafeed_analog *analog, void *info)
57 {
58         struct fs9721_info *info_local;
59
60         info_local = (struct fs9721_info *)info;
61
62         /* User-defined FS9721_LP3 flag 'c2c1_01' means temperature. */
63         if (info_local->is_c2c1_01) {
64                 analog->mq = SR_MQ_TEMPERATURE;
65                 analog->unit = SR_UNIT_CELSIUS;
66         }
67 }
68
69 SR_PRIV void dmm_details_pce_dm32(struct sr_datafeed_analog *analog, void *info)
70 {
71         struct fs9721_info *info_local;
72
73         info_local = (struct fs9721_info *)info;
74
75         /* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (F). */
76         if (info_local->is_c2c1_01) {
77                 analog->mq = SR_MQ_TEMPERATURE;
78                 analog->unit = SR_UNIT_FAHRENHEIT;
79         }
80
81         /* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
82         if (info_local->is_c2c1_10) {
83                 analog->mq = SR_MQ_TEMPERATURE;
84                 analog->unit = SR_UNIT_CELSIUS;
85         }
86 }
87
88 static void handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi,
89                           int dmm, void *info)
90 {
91         float floatval;
92         struct sr_datafeed_packet packet;
93         struct sr_datafeed_analog *analog;
94         struct dev_context *devc;
95
96         log_dmm_packet(buf);
97         devc = sdi->priv;
98
99         if (!(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog)))) {
100                 sr_err("Analog packet malloc failed.");
101                 return;
102         }
103
104         analog->probes = sdi->probes;
105         analog->num_samples = 1;
106         analog->mq = -1;
107
108         dmms[dmm].packet_parse(buf, &floatval, analog, info);
109         analog->data = &floatval;
110
111         /* If this DMM needs additional handling, call the resp. function. */
112         if (dmms[dmm].dmm_details)
113                 dmms[dmm].dmm_details(analog, info);
114
115         if (analog->mq != -1) {
116                 /* Got a measurement. */
117                 packet.type = SR_DF_ANALOG;
118                 packet.payload = analog;
119                 sr_session_send(devc->cb_data, &packet);
120                 devc->num_samples++;
121         }
122
123         g_free(analog);
124 }
125
126 static void handle_new_data(struct sr_dev_inst *sdi, int dmm, void *info)
127 {
128         struct dev_context *devc;
129         int len, i, offset = 0;
130
131         devc = sdi->priv;
132
133         /* Try to get as much data as the buffer can hold. */
134         len = DMM_BUFSIZE - devc->buflen;
135         len = serial_read(devc->serial, devc->buf + devc->buflen, len);
136         if (len < 1) {
137                 sr_err("Serial port read error: %d.", len);
138                 return;
139         }
140         devc->buflen += len;
141
142         /* Now look for packets in that data. */
143         while ((devc->buflen - offset) >= dmms[dmm].packet_size) {
144                 if (dmms[dmm].packet_valid(devc->buf + offset)) {
145                         handle_packet(devc->buf + offset, sdi, dmm, info);
146                         offset += dmms[dmm].packet_size;
147                 } else {
148                         offset++;
149                 }
150         }
151
152         /* If we have any data left, move it to the beginning of our buffer. */
153         for (i = 0; i < devc->buflen - offset; i++)
154                 devc->buf[i] = devc->buf[offset + i];
155         devc->buflen -= offset;
156 }
157
158 static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data)
159 {
160         struct sr_dev_inst *sdi;
161         struct dev_context *devc;
162         int64_t time;
163         int ret;
164
165         (void)fd;
166
167         if (!(sdi = cb_data))
168                 return TRUE;
169
170         if (!(devc = sdi->priv))
171                 return TRUE;
172
173         if (revents == G_IO_IN) {
174                 /* Serial data arrived. */
175                 handle_new_data(sdi, dmm, info);
176         } else {
177                 /* Timeout, send another packet request (if DMM needs it). */
178                 if (dmms[dmm].packet_request) {
179                         ret = dmms[dmm].packet_request(devc->serial);
180                         if (ret < 0) {
181                                 sr_err("Failed to request packet: %d.", ret);
182                                 return FALSE;
183                         }
184                 }
185         }
186
187         if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
188                 sr_info("Requested number of samples reached.");
189                 sdi->driver->dev_acquisition_stop(sdi, cb_data);
190                 return TRUE;
191         }
192
193         if (devc->limit_msec) {
194                 time = (g_get_monotonic_time() - devc->starttime) / 1000;
195                 if (time > (int64_t)devc->limit_msec) {
196                         sr_info("Requested time limit reached.");
197                         sdi->driver->dev_acquisition_stop(sdi, cb_data);
198                         return TRUE;
199                 }
200         }
201
202         return TRUE;
203 }
204
205 #define RECEIVE_DATA(ID_UPPER, DMM_DRIVER) \
206 SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
207         struct DMM_DRIVER##_info info; \
208         return receive_data(fd, revents, ID_UPPER, &info, cb_data); }
209
210 /* Driver-specific receive_data() wrappers */
211 RECEIVE_DATA(DIGITEK_DT4000ZC, fs9721)
212 RECEIVE_DATA(TEKPOWER_TP4000ZC, fs9721)
213 RECEIVE_DATA(METEX_ME31, metex14)
214 RECEIVE_DATA(PEAKTECH_3410, metex14)
215 RECEIVE_DATA(MASTECH_MAS345, metex14)
216 RECEIVE_DATA(VA_VA18B, fs9721)
217 RECEIVE_DATA(METEX_M3640D, metex14)
218 RECEIVE_DATA(PEAKTECH_4370, metex14)
219 RECEIVE_DATA(PCE_PCE_DM32, fs9721)
220 RECEIVE_DATA(RADIOSHACK_22_168, metex14)
221 RECEIVE_DATA(RADIOSHACK_22_812, rs9lcd)
222 RECEIVE_DATA(VOLTCRAFT_VC820_SER, fs9721)
223 RECEIVE_DATA(VOLTCRAFT_VC840_SER, fs9721)
224 RECEIVE_DATA(UNI_T_UT61E_SER, es51922)