SP8EBC-ParaTNC/include/nvm.h

/*
 * nvm.h
 *
 *  Created on: Nov 1, 2022
 *      Author: mateusz
 */

#ifndef NVM_H_
#define NVM_H_

#include <stdint.h>
#include "event_log.h"

#define NVM_RECORD_SIZE		8		// in bytes!!

typedef struct __attribute__((packed)) nvm_measurement_t {
	/**
	 * Date-time timestamp in timezone local for a place where station is installed.
	 * Mixture of BCD and integer format, this is just sligtly processed RTC registers
	 * content.
	 *	bit 0  - bit 12 === number of minutes starting from midnight (max 1440)
	 *	bit 13 - bit 21 === days from new year (max 356)
	 *	bit 25 - bit 31 === years (from 00 to 99, from 2000 up to 2099)
	 */
	uint32_t timestamp;

	/**
	 * Temperature represented as 0.2 degrees increment and
	 * humidity in 2% steps
	 * bit 0  - bit 9  === raw temperature, physical: raw / 5 - 50 (from -50.0 to +52.3)
	 * bit 10 - bit 15 === raw humidity, physical: raw * 2 (from 0% to 100%)
	 */
	uint16_t temperature_humidity;

	/**
	 * Average windspeed and gust windspeed stored in 0.2m/s increments
	 * bit 0  - bit 7  === raw average windspeed, physical: raw / 5 (from 0m/s up to 50m/s)
	 * bit 9  - bit 12 === raw maximum windspeed, physical: physical_average + raw / 3
	 * bit 13 - bit 16 === wind direction. lookup table:
	 * 						0 -
	 */
	uint16_t wind;

}nvm_measurement_t;

typedef enum nvm_state_result_t {
	NVM_UNINITIALIZED,
	NVM_OK,
	NVM_NO_SPACE_LEFT,
	NVM_INIT_ERROR,
	NVM_PGM_ERROR
}nvm_state_result_t;

/**
 *
 */
void nvm_measurement_init(void);

/**
 *
 * @param data
 * @return
 */
nvm_state_result_t nvm_measurement_store(nvm_measurement_t * data);

/**
 *
 * @param oldest
 * @param newest
 */
void nvm_event_log_find_first_oldest_newest(event_log_t* oldest, event_log_t* newest);


/**
 *
 */
void nvm_erase_all(void);

void nvm_test_prefill(void);	///<! Only for test purposes!

#endif /* NVM_H_ */