/* Reflow Oven Controller
 *
 * Copyright (C) 2020  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/unique-id.h>
#include <stm32/stm32f4xx.h>

#define LOW_WORD_ADDR (0x1FFF7A10UL)
#define MID_WORD_ADDR (LOW_WORD_ADDR+4U)
#define HIGH_WORD_ADDR (LOW_WORD_ADDR+8U)

void stm_unique_id_get(uint32_t *high, uint32_t *mid, uint32_t *low)
{
	if (!high || !mid || !low)
		return;

	*low = *((uint32_t *)LOW_WORD_ADDR);
	*mid = *((uint32_t *)MID_WORD_ADDR);
	*high = *((uint32_t *)HIGH_WORD_ADDR);
}


void stm_dev_rev_id_get(uint32_t *device_id, uint32_t *revision_id)
{
	if (device_id)
		*device_id = DBGMCU->IDCODE & DBGMCU_IDCODE_DEV_ID;
	if (revision_id)
		*revision_id = (DBGMCU->IDCODE & DBGMCU_IDCODE_REV_ID) >> 16;
}

void stm_cpuid_get(uint8_t *implementer, uint8_t *variant, uint16_t *part_no, uint8_t *rev)
{
	uint32_t cpuid;

	cpuid = SCB->CPUID;

	if (implementer)
		*implementer = (uint8_t)((cpuid >> 24) & 0xFFU);

	if (variant)
		*variant = (uint8_t)((cpuid >> 20) & 0x0FU);

	if (part_no)
		*part_no = (uint16_t)((cpuid >> 4) & 0x0FFFU);

	if (rev)
		*rev = (uint8_t)(cpuid & 0x0FU);

}