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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/runtime.h"
#include "py/mphal.h"
static struct k_poll_signal wait_signal;
static struct k_poll_event wait_events[2] = {
K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SIGNAL,
K_POLL_MODE_NOTIFY_ONLY,
&wait_signal),
K_POLL_EVENT_STATIC_INITIALIZER(K_POLL_TYPE_SEM_AVAILABLE,
K_POLL_MODE_NOTIFY_ONLY,
NULL, 0),
};
void mp_hal_init(void) {
k_poll_signal_init(&wait_signal);
}
void mp_hal_signal_event(void) {
k_poll_signal_raise(&wait_signal, 0);
}
void mp_hal_wait_sem(struct k_sem *sem, uint32_t timeout_ms) {
mp_uint_t t0 = mp_hal_ticks_ms();
if (sem) {
k_poll_event_init(&wait_events[1], K_POLL_TYPE_SEM_AVAILABLE, K_POLL_MODE_NOTIFY_ONLY, sem);
}
for (;;) {
k_timeout_t wait;
if (timeout_ms == (uint32_t)-1) {
wait = K_FOREVER;
} else {
uint32_t dt = mp_hal_ticks_ms() - t0;
if (dt >= timeout_ms) {
return;
}
wait = K_MSEC(timeout_ms - dt);
}
k_poll(wait_events, sem ? 2 : 1, wait);
if (wait_events[0].state == K_POLL_STATE_SIGNALED) {
wait_events[0].signal->signaled = 0;
wait_events[0].state = K_POLL_STATE_NOT_READY;
mp_handle_pending(true);
} else if (sem && wait_events[1].state == K_POLL_STATE_SEM_AVAILABLE) {
wait_events[1].state = K_POLL_STATE_NOT_READY;
return;
}
}
}
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