/* 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.
 *
 * 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/systick.h>
#include <stm32/stm32f4xx.h>
#include <cmsis/core_cm4.h>

volatile uint32_t wait_tick_ms;
volatile uint64_t global_tick_ms;

void systick_setup(void)
{
	/* Setup Systick for 1ms tick @ 168 MHz Clock Speed */
	SysTick_Config(SYSTICK_RELOAD);
}

/**
 * @brief Wait for x milliseconds
 *
 * This function is not reentrant and must not be called from an interrupt
 *
 * @warning Do not use in interrupt context
 * @param ms wait time in ms
 */
void systick_wait_ms(uint32_t ms)
{
	wait_tick_ms = 0UL;
	while (wait_tick_ms < ms);
}

/**
 * @brief Interrupt Handler for SysTick
 *
 * This handler is called every millisecond
 *
 * @warning For calling cyclic functions use separate timers/flags and don't spoil this function
 */
void SysTick_Handler()
{
	/* Increase tick counters */
	wait_tick_ms++;
	global_tick_ms++;
}