]>
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 | ||
6ec6c43b | 21 | #include <config.h> |
7dc55d93 AG |
22 | #include <stdlib.h> |
23 | #include <math.h> | |
24 | #include <string.h> | |
22f54192 | 25 | #include <glib.h> |
c1aae900 | 26 | #include <libsigrok/libsigrok.h> |
bbabddbd UH |
27 | #include "libsigrok-internal.h" |
28 | #include "protocol.h" | |
7dc55d93 | 29 | |
6bef68a7 UH |
30 | static void log_dmm_packet(const uint8_t *buf) |
31 | { | |
c36f78f7 UH |
32 | sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x " |
33 | "%02x %02x %02x %02x %02x %02x %02x %02x %02x " | |
34 | "%02x %02x %02x %02x %02x %02x %02x", | |
6bef68a7 | 35 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], |
c36f78f7 UH |
36 | buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], |
37 | buf[14], buf[15], buf[16], buf[17], buf[18], buf[19], buf[20], | |
38 | buf[21], buf[22]); | |
6bef68a7 UH |
39 | } |
40 | ||
69e19dd7 | 41 | static void handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, |
bcbef5ed | 42 | void *info) |
7dc55d93 | 43 | { |
1a863916 | 44 | struct dmm_info *dmm; |
8c1adf37 | 45 | float floatval; |
7dc55d93 | 46 | struct sr_datafeed_packet packet; |
5faebab2 | 47 | struct sr_datafeed_analog_old analog; |
69e19dd7 | 48 | struct dev_context *devc; |
7dc55d93 | 49 | |
1a863916 UH |
50 | dmm = (struct dmm_info *)sdi->driver; |
51 | ||
6bef68a7 | 52 | log_dmm_packet(buf); |
69e19dd7 | 53 | devc = sdi->priv; |
6bef68a7 | 54 | |
5faebab2 | 55 | memset(&analog, 0, sizeof(struct sr_datafeed_analog_old)); |
bbabddbd | 56 | |
ba7dd8bb | 57 | analog.channels = sdi->channels; |
7c8a9e1e UH |
58 | analog.num_samples = 1; |
59 | analog.mq = -1; | |
7dc55d93 | 60 | |
bcbef5ed | 61 | dmm->packet_parse(buf, &floatval, &analog, info); |
7c8a9e1e | 62 | analog.data = &floatval; |
be5c1d3b | 63 | |
22f54192 | 64 | /* If this DMM needs additional handling, call the resp. function. */ |
bcbef5ed ML |
65 | if (dmm->dmm_details) |
66 | dmm->dmm_details(&analog, info); | |
7dc55d93 | 67 | |
7c8a9e1e | 68 | if (analog.mq != -1) { |
7dc55d93 | 69 | /* Got a measurement. */ |
5faebab2 | 70 | packet.type = SR_DF_ANALOG_OLD; |
7c8a9e1e | 71 | packet.payload = &analog; |
7dc55d93 AG |
72 | sr_session_send(devc->cb_data, &packet); |
73 | devc->num_samples++; | |
74 | } | |
7dc55d93 AG |
75 | } |
76 | ||
2baac44d | 77 | /** Request packet, if required. */ |
bcbef5ed | 78 | SR_PRIV int req_packet(struct sr_dev_inst *sdi) |
2baac44d | 79 | { |
1a863916 | 80 | struct dmm_info *dmm; |
2baac44d MH |
81 | struct dev_context *devc; |
82 | struct sr_serial_dev_inst *serial; | |
83 | int ret; | |
84 | ||
1a863916 UH |
85 | dmm = (struct dmm_info *)sdi->driver; |
86 | ||
bcbef5ed | 87 | if (!dmm->packet_request) |
2baac44d MH |
88 | return SR_OK; |
89 | ||
90 | devc = sdi->priv; | |
91 | serial = sdi->conn; | |
92 | ||
93 | if (devc->req_next_at && (devc->req_next_at > g_get_monotonic_time())) { | |
94 | sr_spew("Not requesting new packet yet, %" PRIi64 " ms left.", | |
95 | ((devc->req_next_at - g_get_monotonic_time()) / 1000)); | |
96 | return SR_OK; | |
97 | } | |
98 | ||
bcbef5ed | 99 | ret = dmm->packet_request(serial); |
2baac44d MH |
100 | if (ret < 0) { |
101 | sr_err("Failed to request packet: %d.", ret); | |
102 | return ret; | |
103 | } | |
104 | ||
bcbef5ed ML |
105 | if (dmm->req_timeout_ms) |
106 | devc->req_next_at = g_get_monotonic_time() + (dmm->req_timeout_ms * 1000); | |
2baac44d MH |
107 | |
108 | return SR_OK; | |
109 | } | |
110 | ||
bcbef5ed | 111 | static void handle_new_data(struct sr_dev_inst *sdi, void *info) |
7dc55d93 | 112 | { |
1a863916 | 113 | struct dmm_info *dmm; |
69e19dd7 | 114 | struct dev_context *devc; |
bbabddbd | 115 | int len, i, offset = 0; |
1e1bfcd0 | 116 | struct sr_serial_dev_inst *serial; |
bbabddbd | 117 | |
1a863916 UH |
118 | dmm = (struct dmm_info *)sdi->driver; |
119 | ||
69e19dd7 | 120 | devc = sdi->priv; |
1e1bfcd0 | 121 | serial = sdi->conn; |
69e19dd7 | 122 | |
bbabddbd | 123 | /* Try to get as much data as the buffer can hold. */ |
7dc55d93 | 124 | len = DMM_BUFSIZE - devc->buflen; |
4277ac34 | 125 | len = serial_read_nonblocking(serial, devc->buf + devc->buflen, len); |
66a43576 UH |
126 | if (len == 0) |
127 | return; /* No new bytes, nothing to do. */ | |
128 | if (len < 0) { | |
bbabddbd | 129 | sr_err("Serial port read error: %d.", len); |
7dc55d93 AG |
130 | return; |
131 | } | |
132 | devc->buflen += len; | |
133 | ||
bbabddbd | 134 | /* Now look for packets in that data. */ |
bcbef5ed ML |
135 | while ((devc->buflen - offset) >= dmm->packet_size) { |
136 | if (dmm->packet_valid(devc->buf + offset)) { | |
137 | handle_packet(devc->buf + offset, sdi, info); | |
138 | offset += dmm->packet_size; | |
2baac44d MH |
139 | |
140 | /* Request next packet, if required. */ | |
bcbef5ed | 141 | if (!dmm->packet_request) |
2baac44d | 142 | break; |
bcbef5ed | 143 | if (dmm->req_timeout_ms || dmm->req_delay_ms) |
2baac44d | 144 | devc->req_next_at = g_get_monotonic_time() + |
bcbef5ed ML |
145 | dmm->req_delay_ms * 1000; |
146 | req_packet(sdi); | |
7dc55d93 AG |
147 | } else { |
148 | offset++; | |
149 | } | |
150 | } | |
151 | ||
bbabddbd UH |
152 | /* If we have any data left, move it to the beginning of our buffer. */ |
153 | for (i = 0; i < devc->buflen - offset; i++) | |
7dc55d93 AG |
154 | devc->buf[i] = devc->buf[offset + i]; |
155 | devc->buflen -= offset; | |
156 | } | |
157 | ||
bcbef5ed | 158 | int receive_data(int fd, int revents, void *cb_data) |
7dc55d93 | 159 | { |
642e9d62 | 160 | struct sr_dev_inst *sdi; |
7dc55d93 | 161 | struct dev_context *devc; |
bcbef5ed | 162 | struct dmm_info *dmm; |
f9b9bd63 | 163 | int64_t time; |
bcbef5ed | 164 | void *info; |
7dc55d93 | 165 | |
d35afa87 BV |
166 | (void)fd; |
167 | ||
7dc55d93 AG |
168 | if (!(sdi = cb_data)) |
169 | return TRUE; | |
170 | ||
171 | if (!(devc = sdi->priv)) | |
172 | return TRUE; | |
173 | ||
1a863916 | 174 | dmm = (struct dmm_info *)sdi->driver; |
bcbef5ed | 175 | |
bbabddbd | 176 | if (revents == G_IO_IN) { |
7dc55d93 | 177 | /* Serial data arrived. */ |
145d794f | 178 | info = g_malloc(dmm->info_size); |
bcbef5ed | 179 | handle_new_data(sdi, info); |
145d794f | 180 | g_free(info); |
ce3777ad | 181 | } else { |
2baac44d | 182 | /* Timeout; send another packet request if DMM needs it. */ |
bcbef5ed | 183 | if (dmm->packet_request && (req_packet(sdi) < 0)) |
2baac44d | 184 | return FALSE; |
7dc55d93 AG |
185 | } |
186 | ||
d55c89f5 | 187 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) { |
35e199da | 188 | sr_info("Requested number of samples reached."); |
7dc55d93 AG |
189 | sdi->driver->dev_acquisition_stop(sdi, cb_data); |
190 | return TRUE; | |
191 | } | |
192 | ||
f9b9bd63 AG |
193 | if (devc->limit_msec) { |
194 | time = (g_get_monotonic_time() - devc->starttime) / 1000; | |
195 | if (time > (int64_t)devc->limit_msec) { | |
35e199da | 196 | sr_info("Requested time limit reached."); |
f9b9bd63 AG |
197 | sdi->driver->dev_acquisition_stop(sdi, cb_data); |
198 | return TRUE; | |
199 | } | |
200 | } | |
201 | ||
7dc55d93 AG |
202 | return TRUE; |
203 | } |