reflow-oven-control-sw/stm-firmware/sd.c

/* Reflow Oven Controller
 *
 * Copyright (C) 2022  Mario Hüttel <mario.huettel@gmx.net>
 *
 * This file is part of the Reflow Oven Controller Project.
 *
 * The reflow oven controller is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * GDSII-Converter 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 the reflow oven controller project.
 * If not, see <http://www.gnu.org/licenses/>.
 */

#include <reflow-controller/sd.h>
#include "fatfs/ff.h"
#include "fatfs/shimatta_sdio_driver/shimatta_sdio.h"
#include <stdint.h>
#include <string.h>
#include <helper-macros/helper-macros.h>
#include <reflow-controller/digio.h>

static bool sd_card_mounted_state = false;

bool mount_sd_card_if_avail(FATFS *fs)
{
	FRESULT res;
	static uint8_t IN_SECTION(.ccm.bss) inserted_counter = 0;

	if (sdio_check_inserted() && sd_card_mounted_state) {
		memset(fs, 0, sizeof(FATFS));
		sdio_stop_clk();
		inserted_counter = 0;
		sd_card_mounted_state = false;
		goto ret;
	}

	if (!sdio_check_inserted() && inserted_counter < 255)
		inserted_counter++;

	if (!sdio_check_inserted() && !sd_card_mounted_state && inserted_counter > 4) {
		inserted_counter = 0;
		res = f_mount(fs, "0:/", 1);
		if (res == FR_OK) {
			led_set(1, 1);
			sd_card_mounted_state = true;
		} else {
			sd_card_mounted_state = false;
		}
	}

ret:
	return sd_card_mounted_state;
}

bool sd_card_is_mounted(void)
{
	return sd_card_mounted_state;
}