Applibs gpio.h

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Header: #include <applibs/gpio.h>

The Applibs gpio header contains functions and types that interact with GPIOs.

Note

The following are listed and described in this section but are currently defined in the linux/gpio.h header file.

   Struct:
      gpiopin_request

    Enum:
      pin_config_param_type

    IOCTL:
      GPIO_SET_PIN_CONFIG_IOCTL

To use them in your application, be sure to add this line to your code:

#include <linux/gpio.h>

Application manifest requirements

To access individual GPIOs, your application must identify them in the Gpio field of the application manifest.

Thread safety

GPIO functions are thread-safe between calls to different GPIOs; however, it is the caller's responsibility to ensure thread safety for accesses to the same GPIO.

Hardware dependent IDs

Some GPIO functions reference identifiers that are hardware dependent. Hardware dependent IDs are constants that are defined in the hardware definition files for a device. For more information, see Manage target hardware dependencies.

Concepts and samples

Functions

Function Description
GPIO_GetValue Gets the current value of a GPIO.
GPIO_OpenAsInput Opens a GPIO as an input.
GPIO_OpenAsOutput Opens a GPIO as an output.
GPIO_SetValue Sets the output value for an output GPIO.

Structs

Struct Description
gpiopin_request The drive strength configuration for one or more GPIO pins.

Enums

Enum Description
GPIO_OutputMode The options for the output mode of a GPIO.
GPIO_Value The possible read/write values for a GPIO.
pin_config_param_type The possible units for the current that drives a GPIO pin.

Typedefs

Typedef Description
GPIO_Id Specifies the type of a GPIO ID, which is used to specify a GPIO peripheral instance.
GPIO_OutputMode_Type Specifies the type of the GPIO output mode.
GPIO_Value_Type Specifies the type of a GPIO value.

I/O Controls (IOCTLs)

IOCTL Description
GPIO_SET_PIN_CONFIG_IOCTL Sets the drive strength of one or more GPIO pins, as specified in the gpiopin_request structure.