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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de> | |
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 2 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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef LIBSIGROK_HARDWARE_CHRONOVU_LA_PROTOCOL_H | |
22 | #define LIBSIGROK_HARDWARE_CHRONOVU_LA_PROTOCOL_H | |
23 | ||
24 | #include <glib.h> | |
25 | #include <libusb.h> | |
26 | #include <ftdi.h> | |
27 | #include <stdint.h> | |
28 | #include <string.h> | |
29 | #include <libsigrok/libsigrok.h> | |
30 | #include "libsigrok-internal.h" | |
31 | ||
32 | #define LOG_PREFIX "la8/la16" | |
33 | ||
34 | #define SDRAM_SIZE (8 * 1024 * 1024) | |
35 | #define MAX_NUM_SAMPLES SDRAM_SIZE | |
36 | ||
37 | #define BS 4096 /* Block size */ | |
38 | #define NUM_BLOCKS 2048 /* Number of blocks */ | |
39 | ||
40 | enum { | |
41 | CHRONOVU_LA8, | |
42 | CHRONOVU_LA16, | |
43 | }; | |
44 | ||
45 | struct cv_profile { | |
46 | int model; | |
47 | const char *modelname; | |
48 | const char *iproduct; /* USB iProduct string */ | |
49 | unsigned int num_channels; | |
50 | uint64_t max_samplerate; | |
51 | const int num_trigger_matches; | |
52 | float trigger_constant; | |
53 | }; | |
54 | ||
55 | /* Private, per-device-instance driver context. */ | |
56 | struct dev_context { | |
57 | /** Device profile struct for this device. */ | |
58 | const struct cv_profile *prof; | |
59 | ||
60 | /** FTDI device context (used by libftdi). */ | |
61 | struct ftdi_context *ftdic; | |
62 | ||
63 | /** The currently configured samplerate of the device. */ | |
64 | uint64_t cur_samplerate; | |
65 | ||
66 | /** The current sampling limit (in ms). */ | |
67 | uint64_t limit_msec; | |
68 | ||
69 | /** The current sampling limit (in number of samples). */ | |
70 | uint64_t limit_samples; | |
71 | ||
72 | /** | |
73 | * A buffer containing some (mangled) samples from the device. | |
74 | * Format: Pretty mangled-up (due to hardware reasons), see code. | |
75 | */ | |
76 | uint8_t mangled_buf[BS]; | |
77 | ||
78 | /** | |
79 | * An 8MB buffer where we'll store the de-mangled samples. | |
80 | * LA8: Each sample is 1 byte, MSB is channel 7, LSB is channel 0. | |
81 | * LA16: Each sample is 2 bytes, MSB is channel 15, LSB is channel 0. | |
82 | */ | |
83 | uint8_t *final_buf; | |
84 | ||
85 | /** | |
86 | * Trigger pattern. | |
87 | * A 1 bit matches a high signal, 0 matches a low signal on a channel. | |
88 | * | |
89 | * If the resp. 'trigger_edgemask' bit is set, 1 means "rising edge", | |
90 | * and 0 means "falling edge". | |
91 | */ | |
92 | uint16_t trigger_pattern; | |
93 | ||
94 | /** | |
95 | * Trigger mask. | |
96 | * A 1 bit means "must match trigger_pattern", 0 means "don't care". | |
97 | */ | |
98 | uint16_t trigger_mask; | |
99 | ||
100 | /** | |
101 | * Trigger edge mask. | |
102 | * A 1 bit means "edge triggered", 0 means "state triggered". | |
103 | * | |
104 | * Edge triggering is only supported on LA16 (but not LA8). | |
105 | */ | |
106 | uint16_t trigger_edgemask; | |
107 | ||
108 | /** Tells us whether an SR_DF_TRIGGER packet was already sent. */ | |
109 | int trigger_found; | |
110 | ||
111 | /** Used for keeping track how much time has passed. */ | |
112 | gint64 done; | |
113 | ||
114 | /** Counter/index for the data block to be read. */ | |
115 | int block_counter; | |
116 | ||
117 | /** The divcount value (determines the sample period). */ | |
118 | uint8_t divcount; | |
119 | ||
120 | /** This ChronoVu device's USB VID/PID. */ | |
121 | uint16_t usb_vid; | |
122 | uint16_t usb_pid; | |
123 | ||
124 | /** Samplerates supported by this device. */ | |
125 | uint64_t samplerates[255]; | |
126 | }; | |
127 | ||
128 | /* protocol.c */ | |
129 | extern SR_PRIV const char *cv_channel_names[]; | |
130 | extern const struct cv_profile cv_profiles[]; | |
131 | SR_PRIV void cv_fill_samplerates_if_needed(const struct sr_dev_inst *sdi); | |
132 | SR_PRIV uint8_t cv_samplerate_to_divcount(const struct sr_dev_inst *sdi, | |
133 | uint64_t samplerate); | |
134 | SR_PRIV int cv_write(struct dev_context *devc, uint8_t *buf, int size); | |
135 | SR_PRIV int cv_convert_trigger(const struct sr_dev_inst *sdi); | |
136 | SR_PRIV int cv_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate); | |
137 | SR_PRIV int cv_read_block(struct dev_context *devc); | |
138 | SR_PRIV void cv_send_block_to_session_bus(const struct sr_dev_inst *sdi, int block); | |
139 | ||
140 | #endif |