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GPIO
====
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Overview
--------
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The ESP32 chip features 40 physical GPIO pads. Some GPIO pads cannot be used or do not have the corresponding pin on the chip package(refer to technical reference manual ). Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal.
Note that GPIO6-11 are usually used for SPI flash. GPIO34-39 can only be set as input mode.
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Application Example
-------------------
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GPIO output and input interrupt example: `examples/21_gpio <https://github.com/espressif/esp-idf/tree/master/examples/21_gpio> `_ .
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API Reference
-------------
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Header Files
^^^^^^^^^^^^
* `driver/include/driver/driver/gpio.h <https://github.com/espressif/esp-idf/blob/master/components/driver/include/driver/gpio.h> `_
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Macros
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^^^^^^
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.. doxygendefine :: GPIO_SEL_0
.. doxygendefine :: GPIO_SEL_1
.. doxygendefine :: GPIO_SEL_2
.. doxygendefine :: GPIO_SEL_3
.. doxygendefine :: GPIO_SEL_4
.. doxygendefine :: GPIO_SEL_5
.. doxygendefine :: GPIO_SEL_6
.. doxygendefine :: GPIO_SEL_7
.. doxygendefine :: GPIO_SEL_8
.. doxygendefine :: GPIO_SEL_9
.. doxygendefine :: GPIO_SEL_10
.. doxygendefine :: GPIO_SEL_11
.. doxygendefine :: GPIO_SEL_12
.. doxygendefine :: GPIO_SEL_13
.. doxygendefine :: GPIO_SEL_14
.. doxygendefine :: GPIO_SEL_15
.. doxygendefine :: GPIO_SEL_16
.. doxygendefine :: GPIO_SEL_17
.. doxygendefine :: GPIO_SEL_18
.. doxygendefine :: GPIO_SEL_19
.. doxygendefine :: GPIO_SEL_21
.. doxygendefine :: GPIO_SEL_22
.. doxygendefine :: GPIO_SEL_23
.. doxygendefine :: GPIO_SEL_25
.. doxygendefine :: GPIO_SEL_26
.. doxygendefine :: GPIO_SEL_27
.. doxygendefine :: GPIO_SEL_32
.. doxygendefine :: GPIO_SEL_33
.. doxygendefine :: GPIO_SEL_34
.. doxygendefine :: GPIO_SEL_35
.. doxygendefine :: GPIO_SEL_36
.. doxygendefine :: GPIO_SEL_37
.. doxygendefine :: GPIO_SEL_38
.. doxygendefine :: GPIO_SEL_39
.. doxygendefine :: GPIO_PIN_REG_0
.. doxygendefine :: GPIO_PIN_REG_1
.. doxygendefine :: GPIO_PIN_REG_2
.. doxygendefine :: GPIO_PIN_REG_3
.. doxygendefine :: GPIO_PIN_REG_4
.. doxygendefine :: GPIO_PIN_REG_5
.. doxygendefine :: GPIO_PIN_REG_6
.. doxygendefine :: GPIO_PIN_REG_7
.. doxygendefine :: GPIO_PIN_REG_8
.. doxygendefine :: GPIO_PIN_REG_9
.. doxygendefine :: GPIO_PIN_REG_10
.. doxygendefine :: GPIO_PIN_REG_11
.. doxygendefine :: GPIO_PIN_REG_12
.. doxygendefine :: GPIO_PIN_REG_13
.. doxygendefine :: GPIO_PIN_REG_14
.. doxygendefine :: GPIO_PIN_REG_15
.. doxygendefine :: GPIO_PIN_REG_16
.. doxygendefine :: GPIO_PIN_REG_17
.. doxygendefine :: GPIO_PIN_REG_18
.. doxygendefine :: GPIO_PIN_REG_19
.. doxygendefine :: GPIO_PIN_REG_20
.. doxygendefine :: GPIO_PIN_REG_21
.. doxygendefine :: GPIO_PIN_REG_22
.. doxygendefine :: GPIO_PIN_REG_23
.. doxygendefine :: GPIO_PIN_REG_25
.. doxygendefine :: GPIO_PIN_REG_26
.. doxygendefine :: GPIO_PIN_REG_27
.. doxygendefine :: GPIO_PIN_REG_32
.. doxygendefine :: GPIO_PIN_REG_33
.. doxygendefine :: GPIO_PIN_REG_34
.. doxygendefine :: GPIO_PIN_REG_35
.. doxygendefine :: GPIO_PIN_REG_36
.. doxygendefine :: GPIO_PIN_REG_37
.. doxygendefine :: GPIO_PIN_REG_38
.. doxygendefine :: GPIO_PIN_REG_39
.. doxygendefine :: GPIO_APP_CPU_INTR_ENA
.. doxygendefine :: GPIO_APP_CPU_NMI_INTR_ENA
.. doxygendefine :: GPIO_PRO_CPU_INTR_ENA
.. doxygendefine :: GPIO_PRO_CPU_NMI_INTR_ENA
.. doxygendefine :: GPIO_SDIO_EXT_INTR_ENA
.. doxygendefine :: GPIO_MODE_DEF_INPUT
.. doxygendefine :: GPIO_MODE_DEF_OUTPUT
.. doxygendefine :: GPIO_MODE_DEF_OD
.. doxygendefine :: GPIO_PIN_COUNT
.. doxygendefine :: GPIO_IS_VALID_GPIO
.. doxygendefine :: GPIO_IS_VALID_OUTPUT_GPIO
Type Definitions
^^^^^^^^^^^^^^^^
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.. doxygentypedef :: gpio_isr_t
.. doxygentypedef :: gpio_isr_handle_t
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Enumerations
^^^^^^^^^^^^
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.. doxygenenum :: gpio_num_t
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.. doxygenenum :: gpio_int_type_t
.. doxygenenum :: gpio_mode_t
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.. doxygenenum :: gpio_pullup_t
.. doxygenenum :: gpio_pulldown_t
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.. doxygenenum :: gpio_pull_mode_t
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Structures
^^^^^^^^^^
.. doxygenstruct :: gpio_config_t
:members:
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Functions
^^^^^^^^^
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.. doxygenfunction :: gpio_config
.. doxygenfunction :: gpio_set_intr_type
.. doxygenfunction :: gpio_intr_enable
.. doxygenfunction :: gpio_intr_disable
.. doxygenfunction :: gpio_set_level
.. doxygenfunction :: gpio_get_level
.. doxygenfunction :: gpio_set_direction
.. doxygenfunction :: gpio_set_pull_mode
.. doxygenfunction :: gpio_wakeup_enable
.. doxygenfunction :: gpio_wakeup_disable
.. doxygenfunction :: gpio_isr_register
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.. doxygenfunction :: gpio_pullup_en
.. doxygenfunction :: gpio_pullup_dis
.. doxygenfunction :: gpio_pulldown_en
.. doxygenfunction :: gpio_pulldown_dis
.. doxygenfunction :: gpio_install_isr_service
.. doxygenfunction :: gpio_uninstall_isr_service
.. doxygenfunction :: gpio_isr_handler_add
.. doxygenfunction :: gpio_isr_handler_remove