ESP-IDF
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Outline
#include "sdkconfig.h"
#include "esp_attr.h"
#include "esp_rom_gpio.h"
#include "soc/gpio_reg.h"
esp_rom_gpio_connect_out_signal(uint32_t, uint32_t, bool, bool)
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/esp_rom/patches/esp_rom_gpio.c
 
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/* * SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #include "sdkconfig.h" #include "esp_attr.h" #include "esp_rom_gpio.h" #include "soc/gpio_reg.h" #if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2 // On such targets, the ROM code for this function enabled output for the pad first, and then connected the signal // This could result in an undesired glitch at the pad IRAM_ATTR __attribute__((optimize("-Os"))) void esp_rom_gpio_connect_out_signal(uint32_t gpio_num, uint32_t signal_idx, bool out_inv, bool oen_inv) { uint32_t value = signal_idx << GPIO_FUNC0_OUT_SEL_S; if (out_inv) { value |= GPIO_FUNC0_OUT_INV_SEL_M; }{...} if (oen_inv) { value |= GPIO_FUNC0_OEN_INV_SEL_M; }{...} REG_WRITE(GPIO_FUNC0_OUT_SEL_CFG_REG + (gpio_num * 4), value); if (gpio_num < 32) { REG_WRITE(GPIO_ENABLE_W1TS_REG, (1 << gpio_num)); }{...} else { REG_WRITE(GPIO_ENABLE1_W1TS_REG, (1 << (gpio_num - 32))); }{...} }{ ... } #endif/* ... */
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