ESP-IDF
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Outline
#include <stdatomic.h>
#include "soc/soc_caps.h"
#include "esp_types.h"
#include "esp_bit_defs.h"
#include "esp_private/esp_gpio_reserve.h"
s_reserved_pin_mask
esp_gpio_reserve(uint64_t)
esp_gpio_revoke(uint64_t)
esp_gpio_is_reserved(uint64_t)
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/esp_hw_support/esp_gpio_reserve.c
 
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/* * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #include <stdatomic.h> #include "soc/soc_caps.h" #include "esp_types.h" #include "esp_bit_defs.h" #include "esp_private/esp_gpio_reserve.h"5 includes static _Atomic uint64_t s_reserved_pin_mask = ATOMIC_VAR_INIT(~(SOC_GPIO_VALID_OUTPUT_GPIO_MASK)); uint64_t esp_gpio_reserve(uint64_t gpio_mask) { return atomic_fetch_or(&s_reserved_pin_mask, gpio_mask); }{ ... } uint64_t esp_gpio_revoke(uint64_t gpio_mask) { return atomic_fetch_and(&s_reserved_pin_mask, ~gpio_mask); }{ ... } bool esp_gpio_is_reserved(uint64_t gpio_mask) { return atomic_load(&s_reserved_pin_mask) & gpio_mask; }{ ... } // TODO: IDF-6968 reserve the pins that not fanned out regarding the SiP version
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