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ab4157b6cf
The original ROM function enabled output for the pad first, and then connected the signal This could result in an undesired level change at the pad Closes https://github.com/espressif/esp-idf/issues/12826
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2010-2023 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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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stdbool.h>
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#include "soc/gpio_pins.h" //for GPIO_MATRIX_CONST_ONE_INPUT, GPIO_MATRIX_CONST_ZERO_INPUT
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/**
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* @brief Configure IO Pad as General Purpose IO,
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* so that it can be connected to internal Matrix,
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* then combined with one or more peripheral signals.
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*
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* @param iopad_num IO Pad number
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*/
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void esp_rom_gpio_pad_select_gpio(uint32_t iopad_num);
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/**
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* @brief Enable internal pull up, and disable internal pull down.
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*
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* @param iopad_num IO Pad number
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*/
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void esp_rom_gpio_pad_pullup_only(uint32_t iopad_num);
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/**
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* @brief Unhold the IO Pad.
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* @note When the Pad is set to hold, the state is latched at that moment and won't get changed.
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*
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* @param iopad_num IP Pad number
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*/
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void esp_rom_gpio_pad_unhold(uint32_t gpio_num);
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/**
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* @brief Set IO Pad current drive capability.
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*
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* @param iopad_num IO Pad number
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* @param drv Numeric to indicate the capability of current drive
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* - 0: 5mA
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* - 1: 10mA
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* - 2: 20mA
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* - 3: 40mA
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*/
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void esp_rom_gpio_pad_set_drv(uint32_t iopad_num, uint32_t drv);
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/**
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* @brief Combine a GPIO input with a peripheral signal, which tagged as input attribute.
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*
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* @note There's no limitation on the number of signals that a GPIO can combine with.
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*
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* @param gpio_num GPIO number, especially, `GPIO_MATRIX_CONST_ZERO_INPUT` means connect logic 0 to signal
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* `GPIO_MATRIX_CONST_ONE_INPUT` means connect logic 1 to signal
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* @param signal_idx Peripheral signal index (tagged as input attribute)
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* @param inv Whether the GPIO input to be inverted or not
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*/
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void esp_rom_gpio_connect_in_signal(uint32_t gpio_num, uint32_t signal_idx, bool inv);
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/**
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* @brief Combine a peripheral signal which tagged as output attribute with a GPIO.
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*
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* @note There's no limitation on the number of signals that a GPIO can combine with.
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* @note Internally, the signal will be connected first, then output will be enabled on the pad.
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*
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* @param gpio_num GPIO number
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* @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.
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* @param out_inv Whether to signal to be inverted or not
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* @param oen_inv Whether the output enable control is inverted or not
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*/
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void esp_rom_gpio_connect_out_signal(uint32_t gpio_num, uint32_t signal_idx, bool out_inv, bool oen_inv);
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#ifdef __cplusplus
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}
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#endif
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