text: /*
   * This file is part of the libsigrok project.
   *
   * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
   * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  #ifndef LIBSIGROK_HARDWARE_SALEAE_LOGIC16_PROTOCOL_H
  #define LIBSIGROK_HARDWARE_SALEAE_LOGIC16_PROTOCOL_H
  
  #include <stdint.h>
  #include <glib.h>
  #include "libsigrok.h"
  #include "libsigrok-internal.h"
  
  /* Message logging helpers with subsystem-specific prefix string. */
  #define LOG_PREFIX "saleae-logic16: "
  #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
  #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
  #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
  #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
  #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
  #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
  
  enum voltage_range {
  	VOLTAGE_RANGE_UNKNOWN,
  	VOLTAGE_RANGE_18_33_V,	/* 1.8V and 3.3V logic */
  	VOLTAGE_RANGE_5_V,	/* 5V logic */
  };
  
  /** Private, per-device-instance driver context. */
  struct dev_context {
  	/*
  	 * Since we can't keep track of a Logic16 device after upgrading
  	 * the firmware (it renumerates into a different device address
  	 * after the upgrade) this is like a global lock. No device will open
  	 * until a proper delay after the last device was upgraded.
  	 */
  	int64_t fw_updated;
  
  	/** The currently configured samplerate of the device. */
  	uint64_t cur_samplerate;
  
  	/** Maximum number of samples to capture, if nonzero. */
  	uint64_t limit_samples;
  
  	/** The currently configured input voltage of the device. */
  	enum voltage_range cur_voltage_range;
  
  	/** The input voltage selected by the user. */
  	enum voltage_range selected_voltage_range;
  
  	/** Channels to use. */
  	uint16_t cur_channels;
  
  	/* EEPROM data from address 8. */
  	uint8_t eeprom_data[8];
  
  	int64_t num_samples;
  	int submitted_transfers;
  	int empty_transfer_count;
  	int num_channels, cur_channel;
  	uint16_t channel_masks[16];
  	uint16_t channel_data[16];
  	uint8_t *convbuffer;
  	size_t convbuffer_size;
  
  	void *cb_data;
  	unsigned int num_transfers;
  	struct libusb_transfer **transfers;
  	int *usbfd;
  };
  
  SR_PRIV int logic16_setup_acquisition(const struct sr_dev_inst *sdi,
  			uint64_t samplerate, uint16_t channels);
  SR_PRIV int logic16_start_acquisition(const struct sr_dev_inst *sdi);
  SR_PRIV int logic16_abort_acquisition(const struct sr_dev_inst *sdi);
  SR_PRIV int logic16_init_device(const struct sr_dev_inst *sdi);
  SR_PRIV void logic16_receive_transfer(struct libusb_transfer *transfer);
  
  #endif
  