2 * This file is part of the sigrok project.
4 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "libsigrok.h"
26 #include "libsigrok-internal.h"
29 /* User-defined FS9721_LP3 flag 'c2c1_10' means temperature on this DMM. */
30 #define is_temperature info.is_c2c1_10
32 static void log_dmm_packet(const uint8_t *buf)
34 sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x"
35 " %02x %02x %02x %02x %02x %02x %02x",
36 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
37 buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13]);
40 /* Now see what the value means, and pass that on. */
41 static void fs9721_serial_handle_packet(const uint8_t *buf,
42 struct dev_context *devc)
45 struct sr_datafeed_packet packet;
46 struct sr_datafeed_analog *analog;
47 struct fs9721_info info;
51 if (!(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog)))) {
52 sr_err("Analog packet malloc failed.");
56 if (!(analog->data = g_try_malloc(sizeof(float)))) {
57 sr_err("Analog value malloc failed.");
62 analog->num_samples = 1;
65 sr_fs9721_parse(buf, &floatval, analog, &info);
66 *analog->data = floatval;
69 analog->mq = SR_MQ_TEMPERATURE;
70 /* No Kelvin or Fahrenheit from the device, just Celsius. */
71 analog->unit = SR_UNIT_CELSIUS;
74 if (analog->mq != -1) {
75 /* Got a measurement. */
76 packet.type = SR_DF_ANALOG;
77 packet.payload = analog;
78 sr_session_send(devc->cb_data, &packet);
86 static void handle_new_data(struct dev_context *devc)
88 int len, i, offset = 0;
90 /* Try to get as much data as the buffer can hold. */
91 len = DMM_BUFSIZE - devc->buflen;
92 len = serial_read(devc->serial, devc->buf + devc->buflen, len);
94 sr_err("Serial port read error: %d.", len);
99 /* Now look for packets in that data. */
100 while ((devc->buflen - offset) >= FS9721_PACKET_SIZE) {
101 if (sr_fs9721_packet_valid(devc->buf + offset)) {
102 fs9721_serial_handle_packet(devc->buf + offset, devc);
103 offset += FS9721_PACKET_SIZE;
109 /* If we have any data left, move it to the beginning of our buffer. */
110 for (i = 0; i < devc->buflen - offset; i++)
111 devc->buf[i] = devc->buf[offset + i];
112 devc->buflen -= offset;
115 SR_PRIV int tekpower_dmm_receive_data(int fd, int revents, void *cb_data)
117 struct sr_dev_inst *sdi;
118 struct dev_context *devc;
122 if (!(sdi = cb_data))
125 if (!(devc = sdi->priv))
128 if (revents == G_IO_IN) {
129 /* Serial data arrived. */
130 handle_new_data(devc);
133 if (devc->num_samples >= devc->limit_samples) {
134 sr_info("Requested number of samples reached, stopping.");
135 sdi->driver->dev_acquisition_stop(sdi, cb_data);