82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/* Reflow Oven Controller
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*
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* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file systick.c
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*/
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#include <reflow-controller/systick.h>
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#include <stm32/stm32f4xx.h>
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#include <cmsis/core_cm4.h>
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volatile uint32_t wait_tick_ms;
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volatile uint64_t global_tick_ms;
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void systick_setup(void)
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{
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/* Setup Systick for 1ms tick @ 168 MHz Clock Speed */
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SysTick_Config(SYSTICK_RELOAD);
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}
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void systick_wait_ms(uint32_t ms)
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{
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wait_tick_ms = 0UL;
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while (wait_tick_ms < ms);
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}
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uint64_t systick_get_global_tick()
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{
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return global_tick_ms;
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}
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bool __attribute__((optimize("O3"))) systick_ticks_have_passed(uint64_t start_timestamp, uint64_t ticks)
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{
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uint64_t end_timestamp = start_timestamp + ticks;
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uint64_t current_timestamp = systick_get_global_tick();
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/* wrap around expected */
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if (end_timestamp < start_timestamp) {
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/* Wrap around occured */
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if (current_timestamp < start_timestamp) {
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if (current_timestamp >= end_timestamp)
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return true;
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}
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} else {
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if (current_timestamp >= end_timestamp)
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return true;
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}
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return false;
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}
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/**
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* @brief Interrupt Handler for SysTick
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*
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* This handler is called every millisecond
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*
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* @warning For calling cyclic functions use separate timers/flags and don't spoil this function
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*/
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void __attribute__((optimize("O3"))) SysTick_Handler()
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{
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/* Increase tick counters */
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wait_tick_ms++;
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global_tick_ms++;
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}
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