2 * This file is part of the libsigrok 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/>.
20 #ifndef LIBSIGROK_HARDWARE_SERIAL_DMM_PROTOCOL_H
21 #define LIBSIGROK_HARDWARE_SERIAL_DMM_PROTOCOL_H
23 #define LOG_PREFIX "serial-dmm"
26 /** libsigrok driver info struct. */
27 struct sr_dev_driver di;
28 /** Manufacturer/brand. */
32 /** serialconn string. */
36 /** Packet size in bytes. */
38 /** Request timeout [ms] before request is considered lost and a new
39 * one is sent. Used only if device needs polling. */
40 int64_t req_timeout_ms;
41 /** Delay between reception of packet and next request. Some DMMs
42 * need this. Used only if device needs polling. */
44 /** Packet request function. */
45 int (*packet_request)(struct sr_serial_dev_inst *);
46 /** Packet validation function. */
47 gboolean (*packet_valid)(const uint8_t *);
48 /** Packet parsing function. */
49 int (*packet_parse)(const uint8_t *, float *,
50 struct sr_datafeed_analog_old *, void *);
52 void (*dmm_details)(struct sr_datafeed_analog_old *, void *);
53 /** Size of chipset info struct. */
57 #define DMM_BUFSIZE 256
59 /** Private, per-device-instance driver context. */
61 /** The current sampling limit (in number of samples). */
62 uint64_t limit_samples;
64 /** The time limit (in milliseconds). */
67 /** Opaque pointer passed in by the frontend. */
70 /** The current number of already received samples. */
73 /** The starting time of current sampling run. */
76 uint8_t buf[DMM_BUFSIZE];
80 /** The timestamp [µs] to send the next request.
81 * Used only if device needs polling. */
85 SR_PRIV int req_packet(struct sr_dev_inst *sdi);
86 SR_PRIV int receive_data(int fd, int revents, void *cb_data);