/*
 * File:        sht4x.h
 * Description: Sensirion SHT4x sensor communication library
 * Author:      David Zaitlik
 * Date:        2022-06-22
 *
 *
 * Copyright (c) 2024 Veles Labs s.r.o.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#ifndef INC_SHT4X_H_
#define INC_SHT4X_H_

#include "stdint.h"

/*
 * Defines & macros
 */

#define SHT4X_I2C_ADDRESS 0x44

/*
 * Return values
 */

#define SHT4X_OK 0
#define SHT4X_ERROR -1 // generic error
#define SHT4X_CRC8_ERROR -2 // checksum failed

/*
 * Data types
 */

typedef enum {
	SHT4X_START_MEAS_HIGH_PRECISION = 0xFD,
	SHT4X_START_MEAS_MEDIUM_PRECISION = 0xF6,
	SHT4X_START_MEAS_LOW_PRECISION = 0xE0,
	SHT4X_READ_SERIAL = 0x89,
	SHT4X_SOFT_RESET = 0x94,
	SHT4X_HEATER_200_mW_1_s = 0x39,
	SHT4X_HEATER_200_mW_01_s = 0x32,
	SHT4X_HEATER_110_mW_1_s = 0x2F,
	SHT4X_HEATER_110_mW_01_s = 0x24,
	SHT4X_HEATER_20_mW_1_s = 0x1E,
	SHT4X_HEATER_20_mW_01_s = 0x15
} sht4x_cmd_t;

/*
 * Function prototypes
 */

int8_t sht4x_send_cmd(sht4x_cmd_t cmd);
int8_t sht4x_read_data(uint8_t *buffer, int len);
int8_t sht4x_measure(int16_t *temperature, uint16_t *relative_humidity);

#endif /* INC_SHT4X_H_ */