142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef LIBSIGROK_HARDWARE_CHRONOVU_LA_PROTOCOL_H
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#define LIBSIGROK_HARDWARE_CHRONOVU_LA_PROTOCOL_H
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#include <glib.h>
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#include <ftdi.h>
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#include <stdint.h>
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#include <string.h>
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#include "libsigrok.h"
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#include "libsigrok-internal.h"
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#define LOG_PREFIX "la8/la16"
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#define SDRAM_SIZE (8 * 1024 * 1024)
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#define MAX_NUM_SAMPLES SDRAM_SIZE
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#define BS 4096 /* Block size */
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#define NUM_BLOCKS 2048 /* Number of blocks */
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enum {
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CHRONOVU_LA8,
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CHRONOVU_LA16,
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};
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struct cv_profile {
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int model;
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const char *modelname;
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const char *iproduct; /* USB iProduct string */
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unsigned int num_channels;
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uint64_t max_samplerate;
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const int num_trigger_matches;
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float trigger_constant;
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};
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/* Private, per-device-instance driver context. */
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struct dev_context {
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/** Device profile struct for this device. */
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const struct cv_profile *prof;
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/** FTDI device context (used by libftdi). */
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struct ftdi_context *ftdic;
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/** The currently configured samplerate of the device. */
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uint64_t cur_samplerate;
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/** The current sampling limit (in ms). */
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uint64_t limit_msec;
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/** The current sampling limit (in number of samples). */
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uint64_t limit_samples;
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void *cb_data;
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/**
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* A buffer containing some (mangled) samples from the device.
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* Format: Pretty mangled-up (due to hardware reasons), see code.
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*/
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uint8_t mangled_buf[BS];
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/**
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* An 8MB buffer where we'll store the de-mangled samples.
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* LA8: Each sample is 1 byte, MSB is channel 7, LSB is channel 0.
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* LA16: Each sample is 2 bytes, MSB is channel 15, LSB is channel 0.
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*/
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uint8_t *final_buf;
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/**
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* Trigger pattern.
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* A 1 bit matches a high signal, 0 matches a low signal on a channel.
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*
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* If the resp. 'trigger_edgemask' bit is set, 1 means "rising edge",
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* and 0 means "falling edge".
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*/
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uint16_t trigger_pattern;
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/**
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* Trigger mask.
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* A 1 bit means "must match trigger_pattern", 0 means "don't care".
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*/
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uint16_t trigger_mask;
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/**
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* Trigger edge mask.
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* A 1 bit means "edge triggered", 0 means "state triggered".
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*
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* Edge triggering is only supported on LA16 (but not LA8).
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*/
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uint16_t trigger_edgemask;
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/** Tells us whether an SR_DF_TRIGGER packet was already sent. */
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int trigger_found;
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/** Used for keeping track how much time has passed. */
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gint64 done;
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/** Counter/index for the data block to be read. */
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int block_counter;
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/** The divcount value (determines the sample period). */
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uint8_t divcount;
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/** This ChronoVu device's USB VID/PID. */
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uint16_t usb_vid;
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uint16_t usb_pid;
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/** Samplerates supported by this device. */
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uint64_t samplerates[255];
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};
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/* protocol.c */
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extern SR_PRIV const char *cv_channel_names[];
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extern const struct cv_profile cv_profiles[];
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SR_PRIV void cv_fill_samplerates_if_needed(const struct sr_dev_inst *sdi);
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SR_PRIV uint8_t cv_samplerate_to_divcount(const struct sr_dev_inst *sdi,
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uint64_t samplerate);
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SR_PRIV int cv_write(struct dev_context *devc, uint8_t *buf, int size);
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SR_PRIV int cv_convert_trigger(const struct sr_dev_inst *sdi);
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SR_PRIV int cv_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate);
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SR_PRIV int cv_read_block(struct dev_context *devc);
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SR_PRIV void cv_send_block_to_session_bus(struct dev_context *devc, int block);
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#endif
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