DriverSTM_RC/Source/RTC.c

/*
 * RTC.c
 *
 *  Created on: 15 janv. 2019
 *      Author: e_rcluze
 */

#include "RTC.h"

I2C_HandleTypeDef *I2C_RTC;

/** Private Fonction*/
HAL_StatusTypeDef readRTC(uint8_t reg, uint8_t *tab, int len) {
	HAL_StatusTypeDef res = HAL_I2C_Master_Transmit(I2C_RTC, RTC_ADD, &reg, 1, 10000);
	if(res != HAL_OK)
		return res;
	return HAL_I2C_Master_Receive(I2C_RTC, RTC_ADD, tab, len, 1000);
}

HAL_StatusTypeDef writeRTC(uint8_t reg, uint8_t *tab, int len) {
	uint8_t t[len + 1];
	t[0] = reg;
	for (int i = 0; i < len; i++)
		t[i + 1] = tab[i];
	return HAL_I2C_Master_Transmit(I2C_RTC, RTC_ADD, t, len + 1, 1000);
}

/** Public Fonction*/

void initRTC(I2C_HandleTypeDef *typ) {
	I2C_RTC = typ;
}

HAL_StatusTypeDef readHeure(Heure *heure) {
	uint8_t tab[2];
	HAL_StatusTypeDef res = readRTC(MINUTES, tab, 2);
	heure->minute = (((tab[0] & 0x70) >> 4) * 10) + (tab[0] & 0X0F);
	heure->heure = (((tab[1] & 0X30) >> 4) * 10) + (tab[1] & 0X0F);
	return res;
}

/** Public Fonction*/
HAL_StatusTypeDef readDate(Date *date) {
	uint8_t tab[7];
	HAL_StatusTypeDef res = readRTC(SECOND, tab, 7);
	date->second = (((tab[0] & 0X70) >> 4) * 10) + (tab[0] & 0X0F);
	date->minute = (((tab[1] & 0x70) >> 4) * 10) + (tab[1] & 0X0F);
	date->heure = (((tab[2] & 0X30) >> 4) * 10) + (tab[2] & 0X0F);
	date->jour = (((tab[4] & 0X30) >> 4) * 10) + (tab[4] & 0X0F);
	date->mois = (((tab[5] & 0X10) >> 4) * 10) + (tab[5] & 0X0F);
	date->annee = ((tab[6] >> 4) * 10) + (tab[6] & 0X0F);
	return res;
}

HAL_StatusTypeDef writeDate(Date *date) {
	uint8_t tab[7];

	tab[0] = ((date->second / 10) << 4) + (date->second % 10);
	tab[1] = ((date->minute / 10) << 4) + (date->minute % 10);
	tab[2] = ((date->heure / 10) << 4) + (date->heure % 10);
	tab[3] = date->joursemaine;
	tab[4] = ((date->jour / 10) << 4) + (date->jour % 10);
	tab[5] = ((date->mois / 10) << 4) + (date->mois % 10);
	tab[6] = ((date->annee / 10) << 4) + (date->annee % 10);

	return writeRTC(SECOND, tab, 7);
}

HAL_StatusTypeDef redemareRTC() {
	uint8_t pt[1];
	HAL_StatusTypeDef res = readRTC(ALARM_HOURS, pt, 1);
		if (res != HAL_OK)
		return res;
	pt[0] = pt[0] & !0x40;
	return writeRTC(ALARM_HOURS, pt, 1);
}

void testRTC() {
	Date d;
	d.annee = 2020;
	d.mois = 1;
	d.jour = 20;
	d.joursemaine = 1;
	d.heure = 14;
	d.minute = 0;
	d.second = 0;
	writeDate(&d);
	redemareRTC();
	HAL_Delay(2000);
	readDate(&d);
	HAL_Delay(1);
}

uint16_t HeureEnMinute() {
	Heure h;
	readHeure(&h);
	return h.minute+h.heure*60;
}

void testBatteryRTC() {
	redemareRTC();
	Date d;
	readDate(&d);
	HAL_Delay(1);
}