]>
Commit | Line | Data |
---|---|---|
7dc55d93 | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
7dc55d93 AG |
3 | * |
4 | * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> | |
729b01f9 | 5 | * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> |
7dc55d93 AG |
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 | ||
7dc55d93 AG |
21 | #include <stdlib.h> |
22 | #include <math.h> | |
23 | #include <string.h> | |
22f54192 | 24 | #include <glib.h> |
bbabddbd UH |
25 | #include "libsigrok.h" |
26 | #include "libsigrok-internal.h" | |
27 | #include "protocol.h" | |
7dc55d93 | 28 | |
6bef68a7 UH |
29 | static void log_dmm_packet(const uint8_t *buf) |
30 | { | |
c36f78f7 UH |
31 | sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x " |
32 | "%02x %02x %02x %02x %02x %02x %02x %02x %02x " | |
33 | "%02x %02x %02x %02x %02x %02x %02x", | |
6bef68a7 | 34 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], |
c36f78f7 UH |
35 | buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], |
36 | buf[14], buf[15], buf[16], buf[17], buf[18], buf[19], buf[20], | |
37 | buf[21], buf[22]); | |
6bef68a7 UH |
38 | } |
39 | ||
69e19dd7 | 40 | static void handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, |
bcbef5ed | 41 | void *info) |
7dc55d93 | 42 | { |
1a863916 | 43 | struct dmm_info *dmm; |
8c1adf37 | 44 | float floatval; |
7dc55d93 | 45 | struct sr_datafeed_packet packet; |
7c8a9e1e | 46 | struct sr_datafeed_analog analog; |
69e19dd7 | 47 | struct dev_context *devc; |
7dc55d93 | 48 | |
1a863916 UH |
49 | dmm = (struct dmm_info *)sdi->driver; |
50 | ||
6bef68a7 | 51 | log_dmm_packet(buf); |
69e19dd7 | 52 | devc = sdi->priv; |
6bef68a7 | 53 | |
7c8a9e1e | 54 | memset(&analog, 0, sizeof(struct sr_datafeed_analog)); |
bbabddbd | 55 | |
ba7dd8bb | 56 | analog.channels = sdi->channels; |
7c8a9e1e UH |
57 | analog.num_samples = 1; |
58 | analog.mq = -1; | |
7dc55d93 | 59 | |
bcbef5ed | 60 | dmm->packet_parse(buf, &floatval, &analog, info); |
7c8a9e1e | 61 | analog.data = &floatval; |
be5c1d3b | 62 | |
22f54192 | 63 | /* If this DMM needs additional handling, call the resp. function. */ |
bcbef5ed ML |
64 | if (dmm->dmm_details) |
65 | dmm->dmm_details(&analog, info); | |
7dc55d93 | 66 | |
7c8a9e1e | 67 | if (analog.mq != -1) { |
7dc55d93 | 68 | /* Got a measurement. */ |
7dc55d93 | 69 | packet.type = SR_DF_ANALOG; |
7c8a9e1e | 70 | packet.payload = &analog; |
7dc55d93 AG |
71 | sr_session_send(devc->cb_data, &packet); |
72 | devc->num_samples++; | |
73 | } | |
7dc55d93 AG |
74 | } |
75 | ||
2baac44d | 76 | /** Request packet, if required. */ |
bcbef5ed | 77 | SR_PRIV int req_packet(struct sr_dev_inst *sdi) |
2baac44d | 78 | { |
1a863916 | 79 | struct dmm_info *dmm; |
2baac44d MH |
80 | struct dev_context *devc; |
81 | struct sr_serial_dev_inst *serial; | |
82 | int ret; | |
83 | ||
1a863916 UH |
84 | dmm = (struct dmm_info *)sdi->driver; |
85 | ||
bcbef5ed | 86 | if (!dmm->packet_request) |
2baac44d MH |
87 | return SR_OK; |
88 | ||
89 | devc = sdi->priv; | |
90 | serial = sdi->conn; | |
91 | ||
92 | if (devc->req_next_at && (devc->req_next_at > g_get_monotonic_time())) { | |
93 | sr_spew("Not requesting new packet yet, %" PRIi64 " ms left.", | |
94 | ((devc->req_next_at - g_get_monotonic_time()) / 1000)); | |
95 | return SR_OK; | |
96 | } | |
97 | ||
bcbef5ed | 98 | ret = dmm->packet_request(serial); |
2baac44d MH |
99 | if (ret < 0) { |
100 | sr_err("Failed to request packet: %d.", ret); | |
101 | return ret; | |
102 | } | |
103 | ||
bcbef5ed ML |
104 | if (dmm->req_timeout_ms) |
105 | devc->req_next_at = g_get_monotonic_time() + (dmm->req_timeout_ms * 1000); | |
2baac44d MH |
106 | |
107 | return SR_OK; | |
108 | } | |
109 | ||
bcbef5ed | 110 | static void handle_new_data(struct sr_dev_inst *sdi, void *info) |
7dc55d93 | 111 | { |
1a863916 | 112 | struct dmm_info *dmm; |
69e19dd7 | 113 | struct dev_context *devc; |
bbabddbd | 114 | int len, i, offset = 0; |
1e1bfcd0 | 115 | struct sr_serial_dev_inst *serial; |
bbabddbd | 116 | |
1a863916 UH |
117 | dmm = (struct dmm_info *)sdi->driver; |
118 | ||
69e19dd7 | 119 | devc = sdi->priv; |
1e1bfcd0 | 120 | serial = sdi->conn; |
69e19dd7 | 121 | |
bbabddbd | 122 | /* Try to get as much data as the buffer can hold. */ |
7dc55d93 | 123 | len = DMM_BUFSIZE - devc->buflen; |
4277ac34 | 124 | len = serial_read_nonblocking(serial, devc->buf + devc->buflen, len); |
66a43576 UH |
125 | if (len == 0) |
126 | return; /* No new bytes, nothing to do. */ | |
127 | if (len < 0) { | |
bbabddbd | 128 | sr_err("Serial port read error: %d.", len); |
7dc55d93 AG |
129 | return; |
130 | } | |
131 | devc->buflen += len; | |
132 | ||
bbabddbd | 133 | /* Now look for packets in that data. */ |
bcbef5ed ML |
134 | while ((devc->buflen - offset) >= dmm->packet_size) { |
135 | if (dmm->packet_valid(devc->buf + offset)) { | |
136 | handle_packet(devc->buf + offset, sdi, info); | |
137 | offset += dmm->packet_size; | |
2baac44d MH |
138 | |
139 | /* Request next packet, if required. */ | |
bcbef5ed | 140 | if (!dmm->packet_request) |
2baac44d | 141 | break; |
bcbef5ed | 142 | if (dmm->req_timeout_ms || dmm->req_delay_ms) |
2baac44d | 143 | devc->req_next_at = g_get_monotonic_time() + |
bcbef5ed ML |
144 | dmm->req_delay_ms * 1000; |
145 | req_packet(sdi); | |
7dc55d93 AG |
146 | } else { |
147 | offset++; | |
148 | } | |
149 | } | |
150 | ||
bbabddbd UH |
151 | /* If we have any data left, move it to the beginning of our buffer. */ |
152 | for (i = 0; i < devc->buflen - offset; i++) | |
7dc55d93 AG |
153 | devc->buf[i] = devc->buf[offset + i]; |
154 | devc->buflen -= offset; | |
155 | } | |
156 | ||
bcbef5ed | 157 | int receive_data(int fd, int revents, void *cb_data) |
7dc55d93 | 158 | { |
642e9d62 | 159 | struct sr_dev_inst *sdi; |
7dc55d93 | 160 | struct dev_context *devc; |
bcbef5ed | 161 | struct dmm_info *dmm; |
f9b9bd63 | 162 | int64_t time; |
bcbef5ed | 163 | void *info; |
7dc55d93 | 164 | |
d35afa87 BV |
165 | (void)fd; |
166 | ||
7dc55d93 AG |
167 | if (!(sdi = cb_data)) |
168 | return TRUE; | |
169 | ||
170 | if (!(devc = sdi->priv)) | |
171 | return TRUE; | |
172 | ||
1a863916 | 173 | dmm = (struct dmm_info *)sdi->driver; |
bcbef5ed | 174 | |
bbabddbd | 175 | if (revents == G_IO_IN) { |
7dc55d93 | 176 | /* Serial data arrived. */ |
145d794f | 177 | info = g_malloc(dmm->info_size); |
bcbef5ed | 178 | handle_new_data(sdi, info); |
145d794f | 179 | g_free(info); |
ce3777ad | 180 | } else { |
2baac44d | 181 | /* Timeout; send another packet request if DMM needs it. */ |
bcbef5ed | 182 | if (dmm->packet_request && (req_packet(sdi) < 0)) |
2baac44d | 183 | return FALSE; |
7dc55d93 AG |
184 | } |
185 | ||
d55c89f5 | 186 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) { |
35e199da | 187 | sr_info("Requested number of samples reached."); |
7dc55d93 AG |
188 | sdi->driver->dev_acquisition_stop(sdi, cb_data); |
189 | return TRUE; | |
190 | } | |
191 | ||
f9b9bd63 AG |
192 | if (devc->limit_msec) { |
193 | time = (g_get_monotonic_time() - devc->starttime) / 1000; | |
194 | if (time > (int64_t)devc->limit_msec) { | |
35e199da | 195 | sr_info("Requested time limit reached."); |
f9b9bd63 AG |
196 | sdi->driver->dev_acquisition_stop(sdi, cb_data); |
197 | return TRUE; | |
198 | } | |
199 | } | |
200 | ||
7dc55d93 AG |
201 | return TRUE; |
202 | } |