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ba508e22 UH |
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 | |
2ea1fdf1 | 20 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
ba508e22 UH |
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 | ||
37 | /* Private, per-device-instance driver context. */ | |
38 | struct dev_context { | |
39 | uint64_t cur_samplerate; | |
40 | uint64_t limit_samples; | |
41 | uint64_t limit_msec; | |
42 | uint64_t sent_samples; | |
43 | int64_t start_us; | |
44 | int64_t spent_us; | |
45 | uint64_t step; | |
46 | /* Logic */ | |
47 | int32_t num_logic_channels; | |
48 | unsigned int logic_unitsize; | |
49 | /* There is only ever one logic channel group, so its pattern goes here. */ | |
50 | uint8_t logic_pattern; | |
51 | unsigned char logic_data[LOGIC_BUFSIZE]; | |
52 | /* Analog */ | |
53 | int32_t num_analog_channels; | |
54 | GHashTable *ch_ag; | |
55 | gboolean avg; /* True if averaging is enabled */ | |
56 | uint64_t avg_samples; | |
57 | }; | |
58 | ||
59 | /* Logic patterns we can generate. */ | |
60 | enum { | |
61 | /** | |
62 | * Spells "sigrok" across 8 channels using '0's (with '1's as | |
63 | * "background") when displayed using the 'bits' output format. | |
64 | * The pattern is repeated every 8 channels, shifted to the right | |
65 | * in time by one bit. | |
66 | */ | |
67 | PATTERN_SIGROK, | |
68 | ||
69 | /** Pseudo-random values on all channels. */ | |
70 | PATTERN_RANDOM, | |
71 | ||
72 | /** | |
73 | * Incrementing number across 8 channels. The pattern is repeated | |
74 | * every 8 channels, shifted to the right in time by one bit. | |
75 | */ | |
76 | PATTERN_INC, | |
77 | ||
845060fa SA |
78 | /** |
79 | * Single bit "walking" across all logic channels by being | |
80 | * shifted across data lines, restarting after the last line | |
81 | * was used. An all-zero (all-one) state is inserted to prevent | |
82 | * repetitive patterns (e.g. with 8 data lines, every 8th state | |
83 | * would show the same line state) | |
84 | */ | |
85 | PATTERN_WALKING_ONE, | |
86 | PATTERN_WALKING_ZERO, | |
87 | ||
ba508e22 UH |
88 | /** All channels have a low logic state. */ |
89 | PATTERN_ALL_LOW, | |
90 | ||
91 | /** All channels have a high logic state. */ | |
92 | PATTERN_ALL_HIGH, | |
81d53a29 GS |
93 | |
94 | /** | |
95 | * Mimics a cable squid. Derived from the "works with" logo | |
96 | * to occupy a larger number of channels yet "painting" | |
97 | * something that can get recognized. | |
98 | */ | |
99 | PATTERN_SQUID, | |
ba508e22 UH |
100 | }; |
101 | ||
102 | /* Analog patterns we can generate. */ | |
103 | enum { | |
104 | /** | |
105 | * Square wave. | |
106 | */ | |
107 | PATTERN_SQUARE, | |
108 | PATTERN_SINE, | |
109 | PATTERN_TRIANGLE, | |
110 | PATTERN_SAWTOOTH, | |
111 | }; | |
112 | ||
113 | static const char *analog_pattern_str[] = { | |
114 | "square", | |
115 | "sine", | |
116 | "triangle", | |
117 | "sawtooth", | |
118 | }; | |
119 | ||
120 | struct analog_gen { | |
01f2adb0 | 121 | struct sr_channel *ch; |
ba508e22 UH |
122 | int pattern; |
123 | float amplitude; | |
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 */ | |
132 | }; | |
133 | ||
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); | |
136 | ||
137 | #endif |