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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2011-2012 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_LA8_DRIVER_H | |
22 | #define LIBSIGROK_HARDWARE_CHRONOVU_LA8_DRIVER_H | |
23 | ||
24 | #include <glib.h> | |
25 | #include <ftdi.h> | |
26 | #include <stdint.h> | |
27 | #include "libsigrok.h" | |
28 | #include "libsigrok-internal.h" | |
29 | ||
30 | #define USB_VENDOR_ID 0x0403 | |
31 | #define USB_DESCRIPTION "ChronoVu LA8" | |
32 | #define USB_VENDOR_NAME "ChronoVu" | |
33 | #define USB_MODEL_NAME "LA8" | |
34 | #define USB_MODEL_VERSION "" | |
35 | ||
36 | #define NUM_PROBES 8 | |
37 | #define TRIGGER_TYPES "01" | |
38 | #define SDRAM_SIZE (8 * 1024 * 1024) | |
39 | #define MIN_NUM_SAMPLES 1 | |
40 | ||
41 | #define BS 4096 /* Block size */ | |
42 | #define NUM_BLOCKS 2048 /* Number of blocks */ | |
43 | ||
44 | /* Private, per-device-instance driver context. */ | |
45 | struct context { | |
46 | /** FTDI device context (used by libftdi). */ | |
47 | struct ftdi_context *ftdic; | |
48 | ||
49 | /** The currently configured samplerate of the device. */ | |
50 | uint64_t cur_samplerate; | |
51 | ||
52 | /** The current sampling limit (in ms). */ | |
53 | uint64_t limit_msec; | |
54 | ||
55 | /** The current sampling limit (in number of samples). */ | |
56 | uint64_t limit_samples; | |
57 | ||
58 | /** TODO */ | |
59 | void *session_dev_id; | |
60 | ||
61 | /** | |
62 | * A buffer containing some (mangled) samples from the device. | |
63 | * Format: Pretty mangled-up (due to hardware reasons), see code. | |
64 | */ | |
65 | uint8_t mangled_buf[BS]; | |
66 | ||
67 | /** | |
68 | * An 8MB buffer where we'll store the de-mangled samples. | |
69 | * Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0. | |
70 | */ | |
71 | uint8_t *final_buf; | |
72 | ||
73 | /** | |
74 | * Trigger pattern (MSB = channel 7, LSB = channel 0). | |
75 | * A 1 bit matches a high signal, 0 matches a low signal on a probe. | |
76 | * Only low/high triggers (but not e.g. rising/falling) are supported. | |
77 | */ | |
78 | uint8_t trigger_pattern; | |
79 | ||
80 | /** | |
81 | * Trigger mask (MSB = channel 7, LSB = channel 0). | |
82 | * A 1 bit means "must match trigger_pattern", 0 means "don't care". | |
83 | */ | |
84 | uint8_t trigger_mask; | |
85 | ||
86 | /** Time (in seconds) before the trigger times out. */ | |
87 | uint64_t trigger_timeout; | |
88 | ||
89 | /** Tells us whether an SR_DF_TRIGGER packet was already sent. */ | |
90 | int trigger_found; | |
91 | ||
92 | /** TODO */ | |
93 | time_t done; | |
94 | ||
95 | /** Counter/index for the data block to be read. */ | |
96 | int block_counter; | |
97 | ||
98 | /** The divcount value (determines the sample period) for the LA8. */ | |
99 | uint8_t divcount; | |
100 | ||
101 | /** This ChronoVu LA8's USB PID (multiple versions exist). */ | |
102 | uint16_t usb_pid; | |
103 | }; | |
104 | ||
105 | /* driver.c */ | |
106 | extern SR_PRIV uint64_t supported_samplerates[]; | |
107 | extern SR_PRIV const int hwcaps[]; | |
108 | extern SR_PRIV const char *probe_names[]; | |
109 | extern const struct sr_samplerates samplerates; | |
110 | SR_PRIV void fill_supported_samplerates_if_needed(void); | |
111 | SR_PRIV int is_valid_samplerate(uint64_t samplerate); | |
112 | SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate); | |
113 | SR_PRIV int la8_write(struct context *ctx, uint8_t *buf, int size); | |
114 | SR_PRIV int la8_read(struct context *ctx, uint8_t *buf, int size); | |
115 | SR_PRIV int la8_close(struct context *ctx); | |
116 | SR_PRIV int la8_close_usb_reset_sequencer(struct context *ctx); | |
117 | SR_PRIV int la8_reset(struct context *ctx); | |
118 | SR_PRIV int configure_probes(struct context *ctx, const GSList *probes); | |
119 | SR_PRIV int set_samplerate(struct sr_dev_inst *sdi, uint64_t samplerate); | |
120 | SR_PRIV int la8_read_block(struct context *ctx); | |
121 | SR_PRIV void send_block_to_session_bus(struct context *ctx, int block); | |
122 | ||
123 | #endif |