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1 | /* | |
2 | * This file is part of the libsigrok 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 | static void handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, | |
39 | int dmm, void *info) | |
40 | { | |
41 | float floatval; | |
42 | struct sr_datafeed_packet packet; | |
43 | struct sr_datafeed_analog analog; | |
44 | struct dev_context *devc; | |
45 | ||
46 | log_dmm_packet(buf); | |
47 | devc = sdi->priv; | |
48 | ||
49 | memset(&analog, 0, sizeof(struct sr_datafeed_analog)); | |
50 | ||
51 | analog.probes = sdi->probes; | |
52 | analog.num_samples = 1; | |
53 | analog.mq = -1; | |
54 | ||
55 | dmms[dmm].packet_parse(buf, &floatval, &analog, info); | |
56 | analog.data = &floatval; | |
57 | ||
58 | /* If this DMM needs additional handling, call the resp. function. */ | |
59 | if (dmms[dmm].dmm_details) | |
60 | dmms[dmm].dmm_details(&analog, info); | |
61 | ||
62 | if (analog.mq != -1) { | |
63 | /* Got a measurement. */ | |
64 | packet.type = SR_DF_ANALOG; | |
65 | packet.payload = &analog; | |
66 | sr_session_send(devc->cb_data, &packet); | |
67 | devc->num_samples++; | |
68 | } | |
69 | } | |
70 | ||
71 | static void handle_new_data(struct sr_dev_inst *sdi, int dmm, void *info) | |
72 | { | |
73 | struct dev_context *devc; | |
74 | int len, i, offset = 0; | |
75 | struct sr_serial_dev_inst *serial; | |
76 | ||
77 | devc = sdi->priv; | |
78 | serial = sdi->conn; | |
79 | ||
80 | /* Try to get as much data as the buffer can hold. */ | |
81 | len = DMM_BUFSIZE - devc->buflen; | |
82 | len = serial_read(serial, devc->buf + devc->buflen, len); | |
83 | if (len < 1) { | |
84 | sr_err("Serial port read error: %d.", len); | |
85 | return; | |
86 | } | |
87 | devc->buflen += len; | |
88 | ||
89 | /* Now look for packets in that data. */ | |
90 | while ((devc->buflen - offset) >= dmms[dmm].packet_size) { | |
91 | if (dmms[dmm].packet_valid(devc->buf + offset)) { | |
92 | handle_packet(devc->buf + offset, sdi, dmm, info); | |
93 | offset += dmms[dmm].packet_size; | |
94 | } else { | |
95 | offset++; | |
96 | } | |
97 | } | |
98 | ||
99 | /* If we have any data left, move it to the beginning of our buffer. */ | |
100 | for (i = 0; i < devc->buflen - offset; i++) | |
101 | devc->buf[i] = devc->buf[offset + i]; | |
102 | devc->buflen -= offset; | |
103 | } | |
104 | ||
105 | static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data) | |
106 | { | |
107 | struct sr_dev_inst *sdi; | |
108 | struct dev_context *devc; | |
109 | struct sr_serial_dev_inst *serial; | |
110 | int64_t time; | |
111 | int ret; | |
112 | ||
113 | (void)fd; | |
114 | ||
115 | if (!(sdi = cb_data)) | |
116 | return TRUE; | |
117 | ||
118 | if (!(devc = sdi->priv)) | |
119 | return TRUE; | |
120 | ||
121 | serial = sdi->conn; | |
122 | ||
123 | if (revents == G_IO_IN) { | |
124 | /* Serial data arrived. */ | |
125 | handle_new_data(sdi, dmm, info); | |
126 | } else { | |
127 | /* Timeout, send another packet request (if DMM needs it). */ | |
128 | if (dmms[dmm].packet_request) { | |
129 | ret = dmms[dmm].packet_request(serial); | |
130 | if (ret < 0) { | |
131 | sr_err("Failed to request packet: %d.", ret); | |
132 | return FALSE; | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) { | |
138 | sr_info("Requested number of samples reached."); | |
139 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
140 | return TRUE; | |
141 | } | |
142 | ||
143 | if (devc->limit_msec) { | |
144 | time = (g_get_monotonic_time() - devc->starttime) / 1000; | |
145 | if (time > (int64_t)devc->limit_msec) { | |
146 | sr_info("Requested time limit reached."); | |
147 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
148 | return TRUE; | |
149 | } | |
150 | } | |
151 | ||
152 | return TRUE; | |
153 | } | |
154 | ||
155 | #define RECEIVE_DATA(ID_UPPER, DMM_DRIVER) \ | |
156 | SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \ | |
157 | struct DMM_DRIVER##_info info; \ | |
158 | return receive_data(fd, revents, ID_UPPER, &info, cb_data); } | |
159 | ||
160 | /* Driver-specific receive_data() wrappers */ | |
161 | RECEIVE_DATA(DIGITEK_DT4000ZC, fs9721) | |
162 | RECEIVE_DATA(TEKPOWER_TP4000ZC, fs9721) | |
163 | RECEIVE_DATA(METEX_ME31, metex14) | |
164 | RECEIVE_DATA(PEAKTECH_3410, metex14) | |
165 | RECEIVE_DATA(MASTECH_MAS345, metex14) | |
166 | RECEIVE_DATA(VA_VA18B, fs9721) | |
167 | RECEIVE_DATA(METEX_M3640D, metex14) | |
168 | RECEIVE_DATA(PEAKTECH_4370, metex14) | |
169 | RECEIVE_DATA(PCE_PCE_DM32, fs9721) | |
170 | RECEIVE_DATA(RADIOSHACK_22_168, metex14) | |
171 | RECEIVE_DATA(RADIOSHACK_22_805, metex14) | |
172 | RECEIVE_DATA(RADIOSHACK_22_812, rs9lcd) | |
173 | RECEIVE_DATA(TECPEL_DMM_8061_SER, fs9721) | |
174 | RECEIVE_DATA(VOLTCRAFT_M3650D, metex14) | |
175 | RECEIVE_DATA(VOLTCRAFT_VC820_SER, fs9721) | |
176 | RECEIVE_DATA(VOLTCRAFT_VC830_SER, fs9922) | |
177 | RECEIVE_DATA(VOLTCRAFT_VC840_SER, fs9721) | |
178 | RECEIVE_DATA(UNI_T_UT60A_SER, fs9721) | |
179 | RECEIVE_DATA(UNI_T_UT60E_SER, fs9721) | |
180 | RECEIVE_DATA(UNI_T_UT61D_SER, fs9922) | |
181 | RECEIVE_DATA(UNI_T_UT61E_SER, es51922) | |
182 | RECEIVE_DATA(ISO_TECH_IDM103N_SER, es519xx) |