libskybms.h

/*
 * Copyright (C) 2021-2022 Skycharge GmbH
 * Author: Roman Penyaev <r.peniaev@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met: 1. Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the following
 * disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef LIBSKYBMS_H
#define LIBSKYBMS_H

#include <stdint.h>

struct bms_data {
	uint32_t charge_volt;  /* Current charging voltage */
	uint16_t charge_perc;  /* Current charge percentage */
	uint16_t charge_time;  /* Seconds left till full charge */
};

struct bms_lib {
	struct {
		uint64_t update_msecs;
		struct bms_data data;
	} *mem;
	int fd;
};

void bms_init(struct bms_lib *bms_lib);
void bms_deinit(struct bms_lib *bms_lib);
int bms_update_data(struct bms_lib *bms_lib, const struct bms_data *data);
int bms_request_data(struct bms_lib *bms_lib, struct bms_data *data);

#endif /* LIBSKYBMS_H */