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20cbc785 AG |
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_BRYMEN_DMM_PROTOCOL_H | |
21 | #define LIBSIGROK_HARDWARE_BRYMEN_DMM_PROTOCOL_H | |
22 | ||
23 | #include <stdint.h> | |
24 | #include "libsigrok.h" | |
25 | #include "libsigrok-internal.h" | |
26 | ||
27 | /* Message logging helpers with driver-specific prefix string. */ | |
28 | #define DRIVER_LOG_DOMAIN "brymen-dmm: " | |
29 | #define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) | |
30 | #define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) | |
31 | #define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) | |
32 | #define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) | |
33 | #define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) | |
34 | #define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) | |
35 | ||
601fb67c AG |
36 | |
37 | #define DMM_BUFSIZE 256 | |
38 | ||
39 | enum packet_len_status { | |
40 | PACKET_HEADER_OK, | |
41 | PACKET_NEED_MORE_DATA, | |
42 | PACKET_INVALID_HEADER, | |
43 | }; | |
44 | ||
20cbc785 AG |
45 | /** Private, per-device-instance driver context. */ |
46 | struct dev_context { | |
47 | /** The current sampling limit (in number of samples). */ | |
48 | uint64_t limit_samples; | |
49 | ||
50 | /** The current sampling limit (in ms). */ | |
51 | uint64_t limit_msec; | |
52 | ||
53 | /** Opaque pointer passed in by the frontend. */ | |
54 | void *cb_data; | |
55 | ||
56 | /** The current number of already received samples. */ | |
57 | uint64_t num_samples; | |
601fb67c AG |
58 | |
59 | /** Start time of acquisition session */ | |
60 | int64_t starttime; | |
61 | ||
62 | struct sr_serial_dev_inst *serial; | |
63 | ||
64 | uint8_t buf[DMM_BUFSIZE]; | |
65 | int bufoffset; | |
66 | int buflen; | |
67 | int next_packet_len; | |
20cbc785 AG |
68 | }; |
69 | ||
601fb67c AG |
70 | /** |
71 | * Callback that assesses the size and status of the incoming packet | |
72 | * | |
73 | * @return PACKET_HEADER_OK - This is a proper packet header. | |
74 | * PACKET_NEED_MORE_DATA The buffer does not contain the entire header | |
75 | * PACKET_INVALID_HEADER Not a valid start of packet. | |
76 | */ | |
77 | typedef int (*packet_length_t)(const uint8_t *buf, int *len); | |
78 | ||
20cbc785 | 79 | SR_PRIV int brymen_dmm_receive_data(int fd, int revents, void *cb_data); |
601fb67c AG |
80 | SR_PRIV int brymen_packet_request(struct sr_serial_dev_inst *serial); |
81 | ||
82 | SR_PRIV int brymen_packet_length(const uint8_t *buf, int *len); | |
83 | SR_PRIV gboolean brymen_packet_is_valid(const uint8_t *buf); | |
20cbc785 | 84 | |
601fb67c AG |
85 | SR_PRIV int brymen_stream_detect(struct sr_serial_dev_inst *serial, |
86 | uint8_t *buf, size_t *buflen, | |
87 | packet_length_t get_packet_size, | |
88 | packet_valid_t is_valid, | |
89 | uint64_t timeout_ms, int baudrate); | |
20cbc785 | 90 | #endif |