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/**
* \file
*
* \brief SysTick related functionality implementation.
*
* Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
*
* \asf_license_start
*
* \page License
*
* Subject to your compliance with these terms, you may use Microchip
* software and any derivatives exclusively with Microchip products.
* It is your responsibility to comply with third party license terms applicable
* to your use of third party software (including open source software) that
* may accompany Microchip software.
*
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
*
* \asf_license_stop
*
*/
#include <hpl_time_measure.h>
#include <hpl_systick_config.h>
#include <hpl_delay.h>
/**
* \brief Initialize system time module
*/
void _system_time_init(void *const hw)
{
(void)hw;
SysTick->LOAD = (0xFFFFFF << SysTick_LOAD_RELOAD_Pos);
SysTick->CTRL = (1 << SysTick_CTRL_ENABLE_Pos) | (CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos)
| (1 << SysTick_CTRL_CLKSOURCE_Pos);
}
/**
* \brief Initialize delay functionality
*/
void _delay_init(void *const hw)
{
_system_time_init(hw);
}
/**
* \brief De-initialize system time module
*/
void _system_time_deinit(void *const hw)
{
(void)hw;
SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
}
/**
* \brief Get system time
*/
system_time_t _system_time_get(const void *const hw)
{
(void)hw;
return (system_time_t)SysTick->VAL;
}
/**
* \brief Get maximum possible system time
*/
system_time_t _system_time_get_max_time_value(const void *const hw)
{
(void)hw;
return 0xFFFFFF;
}
/**
* \brief Delay loop to delay n number of cycles
*/
void _delay_cycles(void *const hw, uint32_t cycles)
{
(void)hw;
uint8_t n = cycles >> 24;
uint32_t buf = cycles;
while (n--) {
SysTick->LOAD = 0xFFFFFF;
SysTick->VAL = 0xFFFFFF;
while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk))
;
buf -= 0xFFFFFF;
}
SysTick->LOAD = buf;
SysTick->VAL = buf;
while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk))
;
}
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