61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* Copyright (c) 2022 The Chromium OS Authors
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "usbc_timer.h"
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/** Timer flag to track if timer was started */
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#define TIMER_STARTED 0
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/** Timer flag to track if timer has expired */
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#define TIMER_EXPIRED 1
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/**
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* @brief The timer function that's executed when the timer expires
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*/
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static void usbc_timer_handler(struct k_timer *timer)
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{
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struct usbc_timer_t *usbc_timer = k_timer_user_data_get(timer);
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atomic_set_bit(&usbc_timer->flags, TIMER_EXPIRED);
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}
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void usbc_timer_init(struct usbc_timer_t *usbc_timer, uint32_t timeout_ms)
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{
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k_timer_init(&usbc_timer->timer, usbc_timer_handler, NULL);
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k_timer_user_data_set(&usbc_timer->timer, usbc_timer);
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usbc_timer->timeout_ms = timeout_ms;
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}
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void usbc_timer_start(struct usbc_timer_t *usbc_timer)
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{
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atomic_clear_bit(&usbc_timer->flags, TIMER_EXPIRED);
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atomic_set_bit(&usbc_timer->flags, TIMER_STARTED);
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k_timer_start(&usbc_timer->timer, K_MSEC(usbc_timer->timeout_ms), K_NO_WAIT);
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}
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bool usbc_timer_expired(struct usbc_timer_t *usbc_timer)
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{
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bool started = atomic_test_bit(&usbc_timer->flags, TIMER_STARTED);
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bool expired = atomic_test_bit(&usbc_timer->flags, TIMER_EXPIRED);
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if (started & expired) {
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atomic_clear_bit(&usbc_timer->flags, TIMER_STARTED);
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return true;
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}
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return false;
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}
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bool usbc_timer_running(struct usbc_timer_t *usbc_timer)
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{
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return atomic_test_bit(&usbc_timer->flags, TIMER_STARTED);
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}
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void usbc_timer_stop(struct usbc_timer_t *usbc_timer)
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{
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atomic_clear_bit(&usbc_timer->flags, TIMER_STARTED);
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k_timer_stop(&usbc_timer->timer);
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}
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