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25 lines
1.2 KiB
C
25 lines
1.2 KiB
C
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/*
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* SPDX-FileCopyrightText: 2021-2022 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 "hal/timer_hal.h"
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#include "hal/timer_ll.h"
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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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