hameg-hmo: Support BE format for SCPI sample downloads

[libsigrok.git] / src / hardware / hameg-hmo / protocol.h

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
 *
 * 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_HAMEG_HMO_PROTOCOL_H
#define LIBSIGROK_HARDWARE_HAMEG_HMO_PROTOCOL_H

#include <glib.h>
#include <stdint.h>
#include <string.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"

#define LOG_PREFIX "hameg-hmo"

#define MAX_INSTRUMENT_VERSIONS 10
#define MAX_COMMAND_SIZE 31

struct scope_config {
	const char *name[MAX_INSTRUMENT_VERSIONS];
	const uint8_t analog_channels;
	const uint8_t digital_channels;
	const uint8_t digital_pods;

	const char *(*analog_names)[];
	const char *(*digital_names)[];

	const uint32_t (*devopts)[];
	const uint8_t num_devopts;

	const uint32_t (*analog_devopts)[];
	const uint8_t num_analog_devopts;

	const char *(*coupling_options)[];
	const uint8_t num_coupling_options;

	const char *(*trigger_sources)[];
	const uint8_t num_trigger_sources;

	const char *(*trigger_slopes)[];

	const uint64_t (*timebases)[][2];
	const uint8_t num_timebases;

	const uint64_t (*vdivs)[][2];
	const uint8_t num_vdivs;

	const uint8_t num_xdivs;
	const uint8_t num_ydivs;

	const char *(*scpi_dialect)[];
};

struct analog_channel_state {
	int coupling;

	int vdiv;
	float vertical_offset;

	gboolean state;
	char probe_unit;
};

struct scope_state {
	struct analog_channel_state *analog_channels;
	gboolean *digital_channels;
	gboolean *digital_pods;

	int timebase;
	float horiz_triggerpos;

	int trigger_source;
	int trigger_slope;
	uint64_t sample_rate;

	/** SCPI data block byte order. 'l'/'b' when known, '?' otherwise. */
	char byteorder;
};

/** Private, per-device-instance driver context. */
struct dev_context {
	const void *model_config;
	void *model_state;

	struct sr_channel_group **analog_groups;
	struct sr_channel_group **digital_groups;

	GSList *enabled_channels;
	GSList *current_channel;
	uint64_t num_frames;

	uint64_t frame_limit;
};

SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi);
SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi);
SR_PRIV int hmo_receive_data(int fd, int revents, void *cb_data);

SR_PRIV struct scope_state *hmo_scope_state_new(struct scope_config *config);
SR_PRIV void hmo_scope_state_free(struct scope_state *state);
SR_PRIV int hmo_scope_state_get(struct sr_dev_inst *sdi);
SR_PRIV int hmo_update_sample_rate(const struct sr_dev_inst *sdi);

#endif