121 lines
3.7 KiB
C
121 lines
3.7 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_LA8_PROTOCOL_H
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#define LIBSIGROK_HARDWARE_CHRONOVU_LA8_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 "libsigrok.h"
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#include "libsigrok-internal.h"
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#define LOG_PREFIX "chronovu-la8"
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#define USB_VENDOR_ID 0x0403
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#define USB_DESCRIPTION "ChronoVu LA8"
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#define USB_VENDOR_NAME "ChronoVu"
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#define USB_MODEL_NAME "LA8"
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#define USB_MODEL_VERSION ""
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#define NUM_CHANNELS 8
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#define TRIGGER_TYPE "01"
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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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/* Private, per-device-instance driver context. */
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struct dev_context {
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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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* Format: Each sample is 1 byte, MSB is channel 7, 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 (MSB = channel 7, LSB = channel 0).
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* A 1 bit matches a high signal, 0 matches a low signal on a channel.
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* Only low/high triggers (but not e.g. rising/falling) are supported.
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*/
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uint8_t trigger_pattern;
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/**
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* Trigger mask (MSB = channel 7, LSB = channel 0).
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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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uint8_t trigger_mask;
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/** Time (in seconds) before the trigger times out. */
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uint64_t trigger_timeout;
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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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time_t 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 PID. */
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uint16_t usb_pid;
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};
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/* protocol.c */
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extern const int32_t cv_hwcaps[];
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extern uint64_t cv_samplerates[];
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extern SR_PRIV const char *cv_channel_names[];
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SR_PRIV void cv_fill_samplerates_if_needed(void);
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SR_PRIV uint8_t cv_samplerate_to_divcount(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_close(struct dev_context *devc);
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SR_PRIV int cv_close_usb_reset_sequencer(struct dev_context *devc);
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SR_PRIV int cv_configure_channels(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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