2 * This file is part of the sigrok project.
4 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
5 * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
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.
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.
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/>.
26 #include "libsigrok.h"
27 #include "libsigrok-internal.h"
30 static void log_dmm_packet(const uint8_t *buf)
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]);
38 SR_PRIV void dmm_details_dt4000zc(struct sr_datafeed_analog *analog, void *info)
40 dmm_details_tp4000zc(analog, info); /* Same as TP4000ZC. */
43 SR_PRIV void dmm_details_tp4000zc(struct sr_datafeed_analog *analog, void *info)
45 struct fs9721_info *info_local;
47 info_local = (struct fs9721_info *)info;
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;
57 static void handle_packet(const uint8_t *buf, struct dev_context *devc,
61 struct sr_datafeed_packet packet;
62 struct sr_datafeed_analog *analog;
66 if (!(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog)))) {
67 sr_err("Analog packet malloc failed.");
71 analog->num_samples = 1;
74 dmms[dmm].packet_parse(buf, &floatval, analog, info);
75 analog->data = &floatval;
77 dmms[dmm].dmm_details(analog, info);
79 if (analog->mq != -1) {
80 /* Got a measurement. */
81 packet.type = SR_DF_ANALOG;
82 packet.payload = analog;
83 sr_session_send(devc->cb_data, &packet);
90 static void handle_new_data(struct dev_context *devc, int dmm, void *info)
92 int len, i, offset = 0;
94 /* Try to get as much data as the buffer can hold. */
95 len = DMM_BUFSIZE - devc->buflen;
96 len = serial_read(devc->serial, devc->buf + devc->buflen, len);
98 sr_err("Serial port read error: %d.", len);
103 /* Now look for packets in that data. */
104 while ((devc->buflen - offset) >= dmms[dmm].packet_size) {
105 if (dmms[dmm].packet_valid(devc->buf + offset)) {
106 handle_packet(devc->buf + offset, devc, dmm, info);
107 offset += dmms[dmm].packet_size;
113 /* If we have any data left, move it to the beginning of our buffer. */
114 for (i = 0; i < devc->buflen - offset; i++)
115 devc->buf[i] = devc->buf[offset + i];
116 devc->buflen -= offset;
119 static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data)
121 struct sr_dev_inst *sdi;
122 struct dev_context *devc;
126 if (!(sdi = cb_data))
129 if (!(devc = sdi->priv))
132 if (revents == G_IO_IN) {
133 /* Serial data arrived. */
134 handle_new_data(devc, dmm, info);
137 if (devc->num_samples >= devc->limit_samples) {
138 sr_info("Requested number of samples reached, stopping.");
139 sdi->driver->dev_acquisition_stop(sdi, cb_data);
146 SR_PRIV int digitek_dt4000zc_receive_data(int fd, int revents, void *cb_data)
148 struct fs9721_info info;
150 return receive_data(fd, revents, DIGITEK_DT4000ZC, &info, cb_data);
153 SR_PRIV int tekpower_tp4000zc_receive_data(int fd, int revents, void *cb_data)
155 struct fs9721_info info;
157 return receive_data(fd, revents, TEKPOWER_TP4000ZC, &info, cb_data);