kopia lustrzana https://github.com/micropython/micropython
77 wiersze
2.2 KiB
C
77 wiersze
2.2 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2024 NXP
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "fsl_common.h"
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#include "fsl_common_arm.h"
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volatile mp_uint_t s_current_tick;
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void mp_hal_delay_ms(mp_uint_t ms) {
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mp_uint_t t_start = s_current_tick;
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while (s_current_tick < (t_start + ms)) {
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MICROPY_EVENT_POLL_HOOK
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}
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}
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void mp_hal_delay_us(mp_uint_t us) {
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mp_uint_t t_end = mp_hal_ticks_us() + us;
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while (mp_hal_ticks_us() < t_end) {
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/* Do not poll events here */
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}
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/* TODO: handle condition when interrupts are disabled. */
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}
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mp_uint_t mp_hal_ticks_ms(void) {
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return s_current_tick * 1000 / MICROPY_HAL_SYSTICK_RATE;
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}
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mp_uint_t mp_hal_ticks_us(void) {
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mp_uint_t reload = SysTick->LOAD;
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mp_uint_t usec = (reload - SysTick->VAL) * (1000000 / MICROPY_HAL_SYSTICK_RATE) / reload;
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return s_current_tick * (1000000 / MICROPY_HAL_SYSTICK_RATE) + usec;
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}
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uint64_t mp_hal_time_ns(void) {
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return mp_hal_ticks_us() * 1000;
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}
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mp_uint_t mp_hal_ticks_cpu(void) {
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for (;;) {
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/* -- */
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}
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}
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void SysTick_Handler(void) {
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s_current_tick++;
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}
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