e1c5761df9
According to guide `gpio_stay_*_map` are specifically there to prevent pulling pins to a specific level and let them float during deep sleep. https://docs.bekencorp.com/sdk_3.0.x/bk7238/build/en/latest/developer-guide/power_save/sleep_test.html This allows any external low-power circuitry to change a pin level, as required, to trigger the wake up This requires changes in BDK and was implemented via fixup. Also, exposed `gpio_stay_lo_map` parameter via `lt_deep_sleep_keep_floating_gpio` to manage this configuration for pins in range P0-P31.
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Copyright (c) Peter Sarkozi 2023-06-17. */
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#pragma once
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#include <libretiny.h>
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/**
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* @brief Enable GPIO Wakeup from Deep Sleep.
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*
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* @param gpio_index_map bitMap of the pins we should wake up on
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* @param on_high whether to wake up on High or Low state
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*/
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void lt_deep_sleep_config_gpio(uint32_t gpio_index_map, bool on_high);
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/**
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* @brief Disable GPIO Wakeup on given pins
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*
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* @param gpio_index_map bitMap of the pins we should disable wake up on
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*/
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void lt_deep_sleep_unset_gpio(uint32_t gpio_index_map);
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/**
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* @brief Configure GPIO pins to be kept floating
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*
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* This prevents pins from being configured as pullup/pulldown, based on
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* the configured wake-up mode (low/high), upon entering deep sleep.
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* This is important, as some-low power devices may be unable to ever
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* overcome the internal pull strength and change the level. One example
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* of such device is a magnetic door sensor that must be able to wake on
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* level change in both directions.
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*
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* @param gpio_index_map bitMap of the pins to set/unset as floating
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* @param enabled whether to set pins to floating or roll back to default mode
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*/
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void lt_deep_sleep_keep_floating_gpio(uint32_t gpio_index_map, bool enabled);
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/**
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* @brief Set a sleep timer to wake up the device
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* @param sleep_duration the time in milliseconds to sleep
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*/
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void lt_deep_sleep_config_timer(uint32_t sleep_duration);
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/**
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* @brief Start deep sleep
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*/
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void lt_deep_sleep_enter();
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