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
38 uint64_t cur_samplerate;
39 uint64_t limit_samples;
41 uint64_t sent_samples;
46 int32_t num_logic_channels;
47 unsigned int logic_unitsize;
48 /* There is only ever one logic channel group, so its pattern goes here. */
49 uint8_t logic_pattern;
50 unsigned char logic_data[LOGIC_BUFSIZE];
52 int32_t num_analog_channels;
54 gboolean avg; /* True if averaging is enabled */
56 size_t enabled_logic_channels;
57 size_t enabled_analog_channels;
58 size_t first_partial_logic_index;
59 uint8_t first_partial_logic_mask;
62 /* Logic patterns we can generate. */
65 * Spells "sigrok" across 8 channels using '0's (with '1's as
66 * "background") when displayed using the 'bits' output format.
67 * The pattern is repeated every 8 channels, shifted to the right
72 /** Pseudo-random values on all channels. */
76 * Incrementing number across 8 channels. The pattern is repeated
77 * every 8 channels, shifted to the right in time by one bit.
82 * Single bit "walking" across all logic channels by being
83 * shifted across data lines, restarting after the last line
84 * was used. An all-zero (all-one) state is inserted to prevent
85 * repetitive patterns (e.g. with 8 data lines, every 8th state
86 * would show the same line state)
91 /** All channels have a low logic state. */
94 /** All channels have a high logic state. */
98 * Mimics a cable squid. Derived from the "works with" logo
99 * to occupy a larger number of channels yet "painting"
100 * something that can get recognized.
105 /* Analog patterns we can generate. */
113 static const char *analog_pattern_str[] = {
121 struct sr_channel *ch;
124 float pattern_data[ANALOG_BUFSIZE];
125 unsigned int num_samples;
126 struct sr_datafeed_analog packet;
127 struct sr_analog_encoding encoding;
128 struct sr_analog_meaning meaning;
129 struct sr_analog_spec spec;
130 float avg_val; /* Average value */
131 unsigned num_avgs; /* Number of samples averaged */
134 SR_PRIV void demo_generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate);
135 SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data);