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83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*
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* Copyright (C) 2020 Kaspar Schleiser <kaspar@schleiser.de>
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* 2020 Freie Universität Berlin
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* 2020 Inria
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup sys_ztimer_periph_timer
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* @{
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*
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* @file
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* @brief ztimer periph/timer backend implementation
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*
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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*
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* @}
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*/
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#include "irq.h"
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#include "ztimer/periph_timer.h"
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static void _ztimer_periph_timer_set(ztimer_clock_t *clock, uint32_t val)
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{
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ztimer_periph_timer_t *ztimer_periph = (ztimer_periph_timer_t *)clock;
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uint16_t min = ztimer_periph->min;
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if (val < min) {
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val = min;
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}
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/* if this is undefined, timer_set() from drivers/periph_timer_common is used.
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* That already dieables irq's.
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* For the others, better ensure that happens.
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*/
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#ifdef PERIPH_TIMER_PROVIDES_SET
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unsigned state = irq_disable();
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#endif
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timer_set(ztimer_periph->dev, 0, val);
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#ifdef PERIPH_TIMER_PROVIDES_SET
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irq_restore(state);
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#endif
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}
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static uint32_t _ztimer_periph_timer_now(ztimer_clock_t *clock)
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{
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ztimer_periph_timer_t *ztimer_periph = (ztimer_periph_timer_t *)clock;
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return timer_read(ztimer_periph->dev);
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}
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static void _ztimer_periph_timer_cancel(ztimer_clock_t *clock)
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{
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ztimer_periph_timer_t *ztimer_periph = (ztimer_periph_timer_t *)clock;
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timer_clear(ztimer_periph->dev, 0);
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}
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static void _ztimer_periph_timer_callback(void *arg, int channel)
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{
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(void)channel;
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ztimer_handler((ztimer_clock_t *)arg);
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}
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static const ztimer_ops_t _ztimer_periph_timer_ops = {
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.set = _ztimer_periph_timer_set,
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.now = _ztimer_periph_timer_now,
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.cancel = _ztimer_periph_timer_cancel,
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};
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void ztimer_periph_timer_init(ztimer_periph_timer_t *clock, tim_t dev, unsigned long freq,
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uint32_t max_val)
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{
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clock->dev = dev;
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clock->super.ops = &_ztimer_periph_timer_ops;
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clock->super.max_value = max_val;
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timer_init(dev, freq, _ztimer_periph_timer_callback, clock);
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}
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