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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
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> | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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/>. | |
21 | */ | |
22 | ||
23 | #ifndef LIBSIGROK_HARDWARE_DEMO_PROTOCOL_H | |
24 | #define LIBSIGROK_HARDWARE_DEMO_PROTOCOL_H | |
25 | ||
26 | #include <stdint.h> | |
27 | #include <libsigrok/libsigrok.h> | |
28 | #include "libsigrok-internal.h" | |
29 | ||
30 | #define LOG_PREFIX "demo" | |
31 | ||
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 1000UL | |
38 | #define DEFAULT_LIMIT_FRAMES 0 | |
39 | ||
40 | /* Logic patterns we can generate. */ | |
41 | enum logic_pattern_type { | |
42 | /** | |
43 | * Spells "sigrok" across 8 channels using '0's (with '1's as | |
44 | * "background") when displayed using the 'bits' output format. | |
45 | * The pattern is repeated every 8 channels, shifted to the right | |
46 | * in time by one bit. | |
47 | */ | |
48 | PATTERN_SIGROK, | |
49 | ||
50 | /** Pseudo-random values on all channels. */ | |
51 | PATTERN_RANDOM, | |
52 | ||
53 | /** | |
54 | * Incrementing number across 8 channels. The pattern is repeated | |
55 | * every 8 channels, shifted to the right in time by one bit. | |
56 | */ | |
57 | PATTERN_INC, | |
58 | ||
59 | /** | |
60 | * Single bit "walking" across all logic channels by being | |
61 | * shifted across data lines, restarting after the last line | |
62 | * was used. An all-zero (all-one) state is inserted to prevent | |
63 | * repetitive patterns (e.g. with 8 data lines, every 8th state | |
64 | * would show the same line state) | |
65 | */ | |
66 | PATTERN_WALKING_ONE, | |
67 | PATTERN_WALKING_ZERO, | |
68 | ||
69 | /** All channels have a low logic state. */ | |
70 | PATTERN_ALL_LOW, | |
71 | ||
72 | /** All channels have a high logic state. */ | |
73 | PATTERN_ALL_HIGH, | |
74 | ||
75 | /** | |
76 | * Mimics a cable squid. Derived from the "works with" logo | |
77 | * to occupy a larger number of channels yet "painting" | |
78 | * something that can get recognized. | |
79 | */ | |
80 | PATTERN_SQUID, | |
81 | ||
82 | /** Gray encoded data, like rotary encoder signals. */ | |
83 | PATTERN_GRAYCODE, | |
84 | }; | |
85 | ||
86 | /* Analog patterns we can generate. */ | |
87 | enum analog_pattern_type { | |
88 | PATTERN_SQUARE, | |
89 | PATTERN_SINE, | |
90 | PATTERN_TRIANGLE, | |
91 | PATTERN_SAWTOOTH, | |
92 | }; | |
93 | ||
94 | struct dev_context { | |
95 | uint64_t cur_samplerate; | |
96 | uint64_t limit_samples; | |
97 | uint64_t limit_msec; | |
98 | uint64_t limit_frames; | |
99 | uint64_t sent_samples; | |
100 | uint64_t sent_frame_samples; /* Number of samples that were sent for current frame. */ | |
101 | int64_t start_us; | |
102 | int64_t spent_us; | |
103 | uint64_t step; | |
104 | /* Logic */ | |
105 | int32_t num_logic_channels; | |
106 | size_t logic_unitsize; | |
107 | uint64_t all_logic_channels_mask; | |
108 | /* There is only ever one logic channel group, so its pattern goes here. */ | |
109 | enum logic_pattern_type logic_pattern; | |
110 | uint8_t logic_data[LOGIC_BUFSIZE]; | |
111 | /* Analog */ | |
112 | int32_t num_analog_channels; | |
113 | GHashTable *ch_ag; | |
114 | gboolean avg; /* True if averaging is enabled */ | |
115 | uint64_t avg_samples; | |
116 | size_t enabled_logic_channels; | |
117 | size_t enabled_analog_channels; | |
118 | size_t first_partial_logic_index; | |
119 | uint8_t first_partial_logic_mask; | |
120 | }; | |
121 | ||
122 | static const char *analog_pattern_str[] = { | |
123 | "square", | |
124 | "sine", | |
125 | "triangle", | |
126 | "sawtooth", | |
127 | }; | |
128 | ||
129 | struct analog_gen { | |
130 | struct sr_channel *ch; | |
131 | enum analog_pattern_type pattern; | |
132 | float amplitude; | |
133 | float pattern_data[ANALOG_BUFSIZE]; | |
134 | unsigned int num_samples; | |
135 | struct sr_datafeed_analog packet; | |
136 | struct sr_analog_encoding encoding; | |
137 | struct sr_analog_meaning meaning; | |
138 | struct sr_analog_spec spec; | |
139 | float avg_val; /* Average value */ | |
140 | unsigned int num_avgs; /* Number of samples averaged */ | |
141 | }; | |
142 | ||
143 | SR_PRIV void demo_generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate); | |
144 | SR_PRIV int demo_prepare_data(int fd, int revents, void *cb_data); | |
145 | ||
146 | #endif |