kopia lustrzana https://github.com/micropython/micropython
75 wiersze
2.6 KiB
C
75 wiersze
2.6 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) 2021 Damien P. George
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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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static struct k_poll_signal wait_signal;
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static struct k_poll_event wait_events[2] = {
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K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SIGNAL,
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K_POLL_MODE_NOTIFY_ONLY,
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&wait_signal),
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K_POLL_EVENT_STATIC_INITIALIZER(K_POLL_TYPE_SEM_AVAILABLE,
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K_POLL_MODE_NOTIFY_ONLY,
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NULL, 0),
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};
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void mp_hal_init(void) {
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k_poll_signal_init(&wait_signal);
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}
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void mp_hal_signal_event(void) {
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k_poll_signal_raise(&wait_signal, 0);
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}
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void mp_hal_wait_sem(struct k_sem *sem, uint32_t timeout_ms) {
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mp_uint_t t0 = mp_hal_ticks_ms();
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if (sem) {
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k_poll_event_init(&wait_events[1], K_POLL_TYPE_SEM_AVAILABLE, K_POLL_MODE_NOTIFY_ONLY, sem);
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}
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for (;;) {
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k_timeout_t wait;
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if (timeout_ms == (uint32_t)-1) {
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wait = K_FOREVER;
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} else {
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uint32_t dt = mp_hal_ticks_ms() - t0;
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if (dt >= timeout_ms) {
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return;
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}
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wait = K_MSEC(timeout_ms - dt);
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}
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k_poll(wait_events, sem ? 2 : 1, wait);
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if (wait_events[0].state == K_POLL_STATE_SIGNALED) {
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wait_events[0].signal->signaled = 0;
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wait_events[0].state = K_POLL_STATE_NOT_READY;
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mp_handle_pending(true);
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} else if (sem && wait_events[1].state == K_POLL_STATE_SEM_AVAILABLE) {
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wait_events[1].state = K_POLL_STATE_NOT_READY;
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return;
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}
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}
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}
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