General-Purpose I/O (GPIO)

Helper functions for configuring and accessing GPIO pins. More...

Enumerations
enum	raspi_GPIO_function {   Input = 0, Output = 1, Alt0 = 4, Alt1 = 5,   Alt2 = 6, Alt3 = 7, Alt4 = 3, Alt5 = 2 }
	Select between GPIO input, GPIO output, or one of the alternate (peripheral) functions.

Functions
static void	gpio_configure (int gpio, raspi_GPIO_function function)
	Configure GPIO gpio for function function.
static void	gpio_set (int gpio)
	Set (to logical high) GPIO output gpio.
static void	gpio_clear (int gpio)
	Clear (set to logical low) GPIO output gpio.
static uint32_t	gpio_read (int gpio)
	Return true (but not neccessarily 1) if GPIO input gpio is driven high.

Detailed Description

Helper functions for configuring and accessing GPIO pins.

Declared in raspi/hw.h.