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108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
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/**
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* \file
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*
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* \brief SysTick related functionality implementation.
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*
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* Copyright (c) 2016-2018 Microchip Technology Inc. and its subsidiaries.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Subject to your compliance with these terms, you may use Microchip
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* software and any derivatives exclusively with Microchip products.
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* It is your responsibility to comply with third party license terms applicable
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* to your use of third party software (including open source software) that
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* may accompany Microchip software.
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*
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* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
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* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
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* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
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* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
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* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
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* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
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* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
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* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
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* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*
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* \asf_license_stop
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*
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*/
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#include <hpl_time_measure.h>
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#include <compiler.h>
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#include <hpl_systick_config.h>
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#ifdef _UNIT_TEST_
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#include <hri_systick_ARMv7_mock.h>
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#endif
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/**
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* \brief Initialize system time module
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*/
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void _system_time_init(void *const hw)
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{
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(void)hw;
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SysTick->LOAD = (0xFFFFFF << SysTick_LOAD_RELOAD_Pos);
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SysTick->CTRL = (1 << SysTick_CTRL_ENABLE_Pos) | (CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos)
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| (1 << SysTick_CTRL_CLKSOURCE_Pos);
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}
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/**
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* \brief Initialize delay functionality
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*/
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void _delay_init(void *const hw)
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{
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_system_time_init(hw);
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}
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/**
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* \brief De-initialize system time module
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*/
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void _system_time_deinit(void *const hw)
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{
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(void)hw;
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SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
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}
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/**
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* \brief Get system time
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*/
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system_time_t _system_time_get(const void *const hw)
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{
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(void)hw;
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return (system_time_t)SysTick->VAL;
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}
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/**
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* \brief Get maximum possible system time
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*/
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system_time_t _system_time_get_max_time_value(const void *const hw)
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{
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(void)hw;
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return 0xFFFFFF;
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}
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/**
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* \brief Delay loop to delay n number of cycles
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*/
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void _delay_cycles(void *const hw, uint32_t cycles)
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{
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(void)hw;
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uint8_t n = cycles >> 24;
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uint32_t buf = cycles;
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while (n--) {
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SysTick->LOAD = 0xFFFFFF;
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SysTick->VAL = 0xFFFFFF;
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while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk))
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;
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buf -= 0xFFFFFF;
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}
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SysTick->LOAD = buf;
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SysTick->VAL = buf;
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while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk))
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;
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}
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