kopia lustrzana https://github.com/espressif/esp-idf
59 wiersze
2.3 KiB
C
59 wiersze
2.3 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdlib.h>
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#include "hal/timer_hal.h"
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#include "hal/timer_ll.h"
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#include "soc/soc_caps.h"
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void timer_hal_init(timer_hal_context_t *hal, uint32_t group_num, uint32_t timer_num)
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{
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hal->dev = TIMER_LL_GET_HW(group_num);
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hal->timer_id = timer_num;
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// stop counter, alarm, auto-reload at first place
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timer_ll_enable_counter(hal->dev, timer_num, false);
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timer_ll_enable_auto_reload(hal->dev, timer_num, false);
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timer_ll_enable_alarm(hal->dev, timer_num, false);
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// enable ETM subsystem if available
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#if SOC_TIMER_SUPPORT_ETM
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timer_ll_enable_etm(hal->dev, true);
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#endif
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}
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void timer_hal_deinit(timer_hal_context_t *hal)
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{
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// ensure counter, alarm, auto-reload are disabled
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timer_ll_enable_counter(hal->dev, hal->timer_id, false);
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timer_ll_enable_auto_reload(hal->dev, hal->timer_id, false);
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timer_ll_enable_alarm(hal->dev, hal->timer_id, false);
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#if SOC_TIMER_SUPPORT_ETM
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timer_ll_enable_etm(hal->dev, false);
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#endif
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hal->dev = NULL;
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}
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void timer_hal_set_counter_value(timer_hal_context_t *hal, uint64_t load_val)
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{
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// - `timer_ll_set_reload_value()` will only indicate the `reload_value`
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// - `timer_ll_set_reload_value()` + ``timer_ll_trigger_soft_reload()` can update the HW counter value by software
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// Therefore, after updating the HW counter value, we need to restore the previous `reload_value`.
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// Attention: The following process should be protected by a lock in the driver layer.
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// save current reload value
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uint64_t old_reload = timer_ll_get_reload_value(hal->dev, hal->timer_id);
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timer_ll_set_reload_value(hal->dev, hal->timer_id, load_val);
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timer_ll_trigger_soft_reload(hal->dev, hal->timer_id);
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// restore the previous reload value
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timer_ll_set_reload_value(hal->dev, hal->timer_id, old_reload);
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}
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uint64_t timer_hal_capture_and_get_counter_value(timer_hal_context_t *hal)
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{
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timer_ll_trigger_soft_capture(hal->dev, hal->timer_id);
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return timer_ll_get_counter_value(hal->dev, hal->timer_id);
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}
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