reflow-oven-control-sw/stm-firmware/main-cycle-counter.c

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/* 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/>.
*/
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/**
* @addtogroup main-cycle-counter
* @{
*/
#include <reflow-controller/main-cycle-counter.h>
#include <helper-macros/helper-macros.h>
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#include <stm32/stm32f4xx.h>
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/**
* @brief Variable storing the main cycle counter.
* @note This variable should not be accessed directly.
* Use the main_cycle_counter_get() or main_cycle_counter_inc() functions.
*/
static uint64_t IN_SECTION(.ccm.bss) main_cycle_counter;
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void main_and_core_cycle_counter_init(void)
{
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
/* Enable the core cycle counter if available on current processor */
if (!(DWT->CTRL & DWT_CTRL_NOCYCCNT_Msk)) {
/* Cycle counter is available. Enable */
DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
}
/* Reset the counters to 0 */
main_cycle_counter_reset();
core_cycle_counter_reset();
}
void main_cycle_counter_reset(void)
{
main_cycle_counter = 0ULL;
}
void main_cycle_counter_inc(void)
{
main_cycle_counter++;
}
uint64_t main_cycle_counter_get(void)
{
return main_cycle_counter;
}
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void core_cycle_counter_reset(void)
{
DWT->CYCCNT = 0UL;
}
uint32_t core_cycle_counter_get(void)
{
return DWT->CYCCNT;
}
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/** @} */