gpio.h File Reference

#include <types.h>
#include <broadway.h>

Go to the source code of this file.

Enumerations
enum	gpio_pin_t {   GPIO_POWER = (1 << 0), GPIO_SHUTDOWN = (1 << 1), GPIO_FAN_SPEED = (1 << 2), GPIO_DC_DC = (1 << 3),   GPIO_DI_SPIN = (1 << 4), GPIO_SLOT_LED = (1 << 5), GPIO_EJECT = (1 << 6), GPIO_SLOT_IN = (1 << 7),   GPIO_SENSOR_BAR = (1 << 8), GPIO_DI_EJECT = (1 << 9), GPIO_EEP_CS = (1 << 10), GPIO_EEP_CLK = (1 << 11),   GPIO_EEP_MOSI = (1 << 12), GPIO_EEP_MISO = (1 << 13), GPIO_AVE_CLK = (1 << 14), GPIO_AVE_DATA = (1 << 15),   GPIO_DEBUG0 = (1 << 16), GPIO_DEBUG1 = (1 << 17), GPIO_DEBUG2 = (1 << 18), GPIO_DEBUG3 = (1 << 19),   GPIO_DEBUG4 = (1 << 20), GPIO_DEBUG5 = (1 << 21), GPIO_DEBUG6 = (1 << 22), GPIO_DEBUG7 = (1 << 23) }
Functions
int	gpio_initialize (void)
	Initialize the GPIO subsystem.
int	gpio_shutdown (void)
	Shut down the GPIO subsystem.
gpio_pin_t	gpio_read (void)
	Reads GPIO data.
void	gpio_write (gpio_pin_t gpios)
	Writes GPIO output data.
void	gpio_set (gpio_pin_t gpios)
	Sets GPIO output data bits.
void	gpio_clear (gpio_pin_t gpios)
	Clears GPIO output data bits.
void	gpio_mask (gpio_pin_t setgpios, gpio_pin_t clrgpios)
	Masks GPIO output data bits.
void	gpio_switch (gpio_pin_t gpios)
	Switches GPIO output data bits.
int	gpio_direction (gpio_pin_t pin, int dir)
	Sets GPIO direction.

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Detailed Description

General Purpose I/O control

---

Enumeration Type Documentation

enum gpio_pin_t

Enumerator:

GPIO_POWER	Power button
GPIO_SHUTDOWN	Shuts down system
GPIO_FAN_SPEED	Set fan high or low
GPIO_DC_DC	DC/DC converter power (powers Broadway?). When off, yellow power LED
GPIO_DI_SPIN	DI spinup disable.
GPIO_SLOT_LED	Blue disc slot LED
GPIO_EJECT	Eject button
GPIO_SLOT_IN	Slot-in button
GPIO_SENSOR_BAR	Sensor bar power
GPIO_DI_EJECT	Trigger DI eject
GPIO_EEP_CS	SEEPROM chip select
GPIO_EEP_CLK	SEEPROM clock
GPIO_EEP_MOSI	Data to SEEPROM
GPIO_EEP_MISO	Data from SEEPROM
GPIO_AVE_CLK	A/V Encoder I2C clock
GPIO_AVE_DATA	A/V Encoder I2C data
GPIO_DEBUG0	Debug Testpoint TP221
GPIO_DEBUG1	Debug Testpoint TP222
GPIO_DEBUG2	Debug Testpoint TP223
GPIO_DEBUG3	Debug Testpoint TP224
GPIO_DEBUG4	Debug Testpoint TP225
GPIO_DEBUG5	Debug Testpoint TP226
GPIO_DEBUG6	Debug Testpoint TP219
GPIO_DEBUG7	Debug Testpoint TP220

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Function Documentation

void gpio_clear

(

gpio_pin_t

gpios

)

Clears GPIO output data bits.

Parameters:

gpios

The GPIO states to clear.

int gpio_direction	(	gpio_pin_t	pin,
		int	dir
	)

Sets GPIO direction.

Parameters:

dir

the new GPIO direction. -1 is input, 1 is output, 0 is no change.

Returns:

The old GPIO direction.

int gpio_initialize

(

void

)

Initialize the GPIO subsystem.

Initializes the GPIO subsystem, registers the handler for the GPIO interrupt and performs all other required initialization tasks.

Returns:

If initialization was successful, returns 1. Otherwise 0.

See also:

gpio_shutdown()

void gpio_mask	(	gpio_pin_t	setgpios,
		gpio_pin_t	clrgpios
	)

Masks GPIO output data bits.

Parameters:

	setgpios	The GPIO states to set.
	clrgpios	The GPIO states to clear.

gpio_pin_t gpio_read

(

void

)

Reads GPIO data.

Reads data from the GPIOs.

Returns:

The GPIO state.

void gpio_set

(

gpio_pin_t

gpios

)

Sets GPIO output data bits.

Parameters:

gpios

The GPIO states to set.

int gpio_shutdown

(

void

)

Shut down the GPIO subsystem.

Shuts down the GPIO subsystem, unregisters the handler for the GPIO interrupt and performs all other required shut down tasks.

Returns:

If shut down was successful, returns 1. Otherwise 0.

See also:

gpio_initialize()

void gpio_switch

(

gpio_pin_t

gpios

)

Switches GPIO output data bits.

Parameters:

gpios

The GPIO states to switch.

void gpio_write

(

gpio_pin_t

gpios

)

Writes GPIO output data.

Parameters:

gpios

The GPIO state to output.