diff --git a/components/esp_rom/CMakeLists.txt b/components/esp_rom/CMakeLists.txt index 5c37b13d47..ca5994b540 100644 --- a/components/esp_rom/CMakeLists.txt +++ b/components/esp_rom/CMakeLists.txt @@ -29,7 +29,8 @@ else() "patches/esp_rom_sys.c" "patches/esp_rom_uart.c" "patches/esp_rom_spiflash.c" - "patches/esp_rom_efuse.c") + "patches/esp_rom_efuse.c" + "patches/esp_rom_gpio.c") # Override regi2c implementation in ROM diff --git a/components/esp_rom/include/esp_rom_gpio.h b/components/esp_rom/include/esp_rom_gpio.h index 4788d7b2de..5405fa3f0a 100644 --- a/components/esp_rom/include/esp_rom_gpio.h +++ b/components/esp_rom/include/esp_rom_gpio.h @@ -66,6 +66,7 @@ void esp_rom_gpio_connect_in_signal(uint32_t gpio_num, uint32_t signal_idx, bool * @brief Combine a peripheral signal which tagged as output attribute with a GPIO. * * @note There's no limitation on the number of signals that a GPIO can combine with. + * @note Internally, the signal will be connected first, then output will be enabled on the pad. * * @param gpio_num GPIO number * @param signal_idx Peripheral signal index (tagged as output attribute). Particularly, `SIG_GPIO_OUT_IDX` means disconnect GPIO and other peripherals. Only the GPIO driver can control the output level. diff --git a/components/esp_rom/patches/esp_rom_gpio.c b/components/esp_rom/patches/esp_rom_gpio.c new file mode 100644 index 0000000000..bf8bef623c --- /dev/null +++ b/components/esp_rom/patches/esp_rom_gpio.c @@ -0,0 +1,28 @@ +/* + * SPDX-FileCopyrightText: 2024 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 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); + + REG_WRITE(GPIO_ENABLE_W1TS_REG, (1 << gpio_num)); +} +#endif