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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #ifndef LIBSIGROK_HARDWARE_SERIAL_DMM_PROTOCOL_H | |
21 | #define LIBSIGROK_HARDWARE_SERIAL_DMM_PROTOCOL_H | |
22 | ||
23 | #define LOG_PREFIX "serial-dmm" | |
24 | ||
25 | struct dmm_info { | |
26 | /** libsigrok driver info struct. */ | |
27 | struct sr_dev_driver di; | |
28 | /** Manufacturer/brand. */ | |
29 | const char *vendor; | |
30 | /** Model. */ | |
31 | const char *device; | |
32 | /** serialconn string. */ | |
33 | const char *conn; | |
34 | /** Baud rate. */ | |
35 | uint32_t baudrate; | |
36 | /** Packet size in bytes. */ | |
37 | int packet_size; | |
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. */ | |
43 | int64_t req_delay_ms; | |
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 *); | |
51 | /** */ | |
52 | void (*dmm_details)(struct sr_datafeed_analog_old *, void *); | |
53 | /** Size of chipset info struct. */ | |
54 | gsize info_size; | |
55 | }; | |
56 | ||
57 | #define DMM_BUFSIZE 256 | |
58 | ||
59 | /** Private, per-device-instance driver context. */ | |
60 | struct dev_context { | |
61 | struct sr_sw_limits limits; | |
62 | ||
63 | uint8_t buf[DMM_BUFSIZE]; | |
64 | int bufoffset; | |
65 | int buflen; | |
66 | ||
67 | /** The timestamp [µs] to send the next request. | |
68 | * Used only if device needs polling. */ | |
69 | int64_t req_next_at; | |
70 | }; | |
71 | ||
72 | SR_PRIV int req_packet(struct sr_dev_inst *sdi); | |
73 | SR_PRIV int receive_data(int fd, int revents, void *cb_data); | |
74 | ||
75 | #endif |