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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 <glib.h> | |
22 | #include <stdlib.h> | |
23 | #include <math.h> | |
24 | #include <string.h> | |
25 | #include <errno.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 | /* No Kelvin or Fahrenheit from the device, just Celsius. */ | |
53 | analog->unit = SR_UNIT_CELSIUS; | |
54 | } | |
55 | } | |
56 | ||
57 | static void handle_packet(const uint8_t *buf, struct dev_context *devc, | |
58 | int dmm, void *info) | |
59 | { | |
60 | float floatval; | |
61 | struct sr_datafeed_packet packet; | |
62 | struct sr_datafeed_analog *analog; | |
63 | ||
64 | log_dmm_packet(buf); | |
65 | ||
66 | if (!(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog)))) { | |
67 | sr_err("Analog packet malloc failed."); | |
68 | return; | |
69 | } | |
70 | ||
71 | analog->num_samples = 1; | |
72 | analog->mq = -1; | |
73 | ||
74 | dmms[dmm].packet_parse(buf, &floatval, analog, info); | |
75 | analog->data = &floatval; | |
76 | ||
77 | if (dmms[dmm].dmm_details) | |
78 | dmms[dmm].dmm_details(analog, info); | |
79 | ||
80 | if (analog->mq != -1) { | |
81 | /* Got a measurement. */ | |
82 | packet.type = SR_DF_ANALOG; | |
83 | packet.payload = analog; | |
84 | sr_session_send(devc->cb_data, &packet); | |
85 | devc->num_samples++; | |
86 | } | |
87 | ||
88 | g_free(analog); | |
89 | } | |
90 | ||
91 | static void handle_new_data(struct dev_context *devc, int dmm, void *info) | |
92 | { | |
93 | int len, i, offset = 0; | |
94 | ||
95 | /* Try to get as much data as the buffer can hold. */ | |
96 | len = DMM_BUFSIZE - devc->buflen; | |
97 | len = serial_read(devc->serial, devc->buf + devc->buflen, len); | |
98 | if (len < 1) { | |
99 | sr_err("Serial port read error: %d.", len); | |
100 | return; | |
101 | } | |
102 | devc->buflen += len; | |
103 | ||
104 | /* Now look for packets in that data. */ | |
105 | while ((devc->buflen - offset) >= dmms[dmm].packet_size) { | |
106 | if (dmms[dmm].packet_valid(devc->buf + offset)) { | |
107 | handle_packet(devc->buf + offset, devc, dmm, info); | |
108 | offset += dmms[dmm].packet_size; | |
109 | } else { | |
110 | offset++; | |
111 | } | |
112 | } | |
113 | ||
114 | /* If we have any data left, move it to the beginning of our buffer. */ | |
115 | for (i = 0; i < devc->buflen - offset; i++) | |
116 | devc->buf[i] = devc->buf[offset + i]; | |
117 | devc->buflen -= offset; | |
118 | } | |
119 | ||
120 | static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data) | |
121 | { | |
122 | struct sr_dev_inst *sdi; | |
123 | struct dev_context *devc; | |
124 | int ret; | |
125 | ||
126 | (void)fd; | |
127 | ||
128 | if (!(sdi = cb_data)) | |
129 | return TRUE; | |
130 | ||
131 | if (!(devc = sdi->priv)) | |
132 | return TRUE; | |
133 | ||
134 | if (revents == G_IO_IN) { | |
135 | /* Serial data arrived. */ | |
136 | handle_new_data(devc, dmm, info); | |
137 | } else { | |
138 | /* Timeout, send another packet request (if DMM needs it). */ | |
139 | if (dmms[dmm].packet_request) { | |
140 | ret = dmms[dmm].packet_request(devc->serial); | |
141 | if (ret < 0) { | |
142 | sr_err("Failed to request packet: %d.", ret); | |
143 | return FALSE; | |
144 | } | |
145 | } | |
146 | } | |
147 | ||
148 | if (devc->num_samples >= devc->limit_samples) { | |
149 | sr_info("Requested number of samples reached, stopping."); | |
150 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
151 | return TRUE; | |
152 | } | |
153 | ||
154 | return TRUE; | |
155 | } | |
156 | ||
157 | SR_PRIV int digitek_dt4000zc_receive_data(int fd, int revents, void *cb_data) | |
158 | { | |
159 | struct fs9721_info info; | |
160 | ||
161 | return receive_data(fd, revents, DIGITEK_DT4000ZC, &info, cb_data); | |
162 | } | |
163 | ||
164 | SR_PRIV int tekpower_tp4000zc_receive_data(int fd, int revents, void *cb_data) | |
165 | { | |
166 | struct fs9721_info info; | |
167 | ||
168 | return receive_data(fd, revents, TEKPOWER_TP4000ZC, &info, cb_data); | |
169 | } | |
170 | ||
171 | SR_PRIV int metex_me31_receive_data(int fd, int revents, void *cb_data) | |
172 | { | |
173 | struct metex14_info info; | |
174 | ||
175 | return receive_data(fd, revents, METEX_ME31, &info, cb_data); | |
176 | } | |
177 | ||
178 | SR_PRIV int peaktech_3410_receive_data(int fd, int revents, void *cb_data) | |
179 | { | |
180 | struct metex14_info info; | |
181 | ||
182 | return receive_data(fd, revents, PEAKTECH_3410, &info, cb_data); | |
183 | } |