/* Reflow Oven Controller
 *
 * Copyright (C) 2021  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.
 *
 * The Reflow Oven Control Firmware 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 <stm-periph/option-bytes.h>
#include <stm32/stm32f4xx.h>

void stm_option_bytes_read(struct option_bytes *opts)
{
	uint32_t opt_reg;

	if (!opts)
		return;

	opt_reg = FLASH->OPTCR;
	opts->brown_out_level = (opt_reg & FLASH_OPTCR_BOR_LEV) >> 2;
	opts->nrst_standby = (opt_reg & FLASH_OPTCR_nRST_STDBY) >> 7;
	opts->nrst_stop = (opt_reg & FLASH_OPTCR_nRST_STOP) >> 6;
	opts->nwrpi = (opt_reg & FLASH_OPTCR_nWRP) >> 16;
	opts->read_protection = (opt_reg & FLASH_OPTCR_RDP) >> 8;
	opts->wdg_sw = (opt_reg & FLASH_OPTCR_WDG_SW) >> 5;
}

int stm_option_bytes_program(const struct option_bytes *opts)
{
	FLASH->OPTKEYR = 0x08192A3BUL;
	FLASH->OPTKEYR = 0x4C5D6E7FUL;


	FLASH->OPTCR |= FLASH_OPTCR_OPTLOCK;
	return 0;
}