2 * This file is part of the libsigrok project.
4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
5 * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com>
6 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
7 * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
23 #ifndef LIBSIGROK_HARDWARE_DEMO_PROTOCOL_H
24 #define LIBSIGROK_HARDWARE_DEMO_PROTOCOL_H
27 #include <libsigrok/libsigrok.h>
28 #include "libsigrok-internal.h"
30 #define LOG_PREFIX "demo"
32 /* The size in bytes of chunks to send through the session bus. */
33 #define LOGIC_BUFSIZE 4096
34 /* Size of the analog pattern space per channel. */
35 #define ANALOG_BUFSIZE 4096
36 /* This is a development feature: it starts a new frame every n samples. */
37 #define SAMPLES_PER_FRAME 0
39 /* Logic patterns we can generate. */
40 enum logic_pattern_type {
42 * Spells "sigrok" across 8 channels using '0's (with '1's as
43 * "background") when displayed using the 'bits' output format.
44 * The pattern is repeated every 8 channels, shifted to the right
49 /** Pseudo-random values on all channels. */
53 * Incrementing number across 8 channels. The pattern is repeated
54 * every 8 channels, shifted to the right in time by one bit.
59 * Single bit "walking" across all logic channels by being
60 * shifted across data lines, restarting after the last line
61 * was used. An all-zero (all-one) state is inserted to prevent
62 * repetitive patterns (e.g. with 8 data lines, every 8th state
63 * would show the same line state)
68 /** All channels have a low logic state. */
71 /** All channels have a high logic state. */
75 * Mimics a cable squid. Derived from the "works with" logo
76 * to occupy a larger number of channels yet "painting"
77 * something that can get recognized.
82 /* Analog patterns we can generate. */
83 enum analog_pattern_type {
91 uint64_t cur_samplerate;
92 uint64_t limit_samples;
94 uint64_t sent_samples;
95 uint64_t sent_frame_samples; /* Number of samples that were sent for current frame. */
100 int32_t num_logic_channels;
101 size_t logic_unitsize;
102 /* There is only ever one logic channel group, so its pattern goes here. */
103 enum logic_pattern_type logic_pattern;
104 uint8_t logic_data[LOGIC_BUFSIZE];
106 int32_t num_analog_channels;
108 gboolean avg; /* True if averaging is enabled */
109 uint64_t avg_samples;
110 size_t enabled_logic_channels;
111 size_t enabled_analog_channels;
112 size_t first_partial_logic_index;
113 uint8_t first_partial_logic_mask;
116 static const char *analog_pattern_str[] = {
124 struct sr_channel *ch;
125 enum analog_pattern_type pattern;
127 float pattern_data[ANALOG_BUFSIZE];
128 unsigned int num_samples;
129 struct sr_datafeed_analog packet;
130 struct sr_analog_encoding encoding;
131 struct sr_analog_meaning meaning;
132 struct sr_analog_spec spec;
133 float avg_val; /* Average value */
134 unsigned int num_avgs; /* Number of samples averaged */
137 SR_PRIV void demo_generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate);
138 SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data);