GPIO_IRQ

gpio IRQ functions More...

Ameba Common
enum	gpio_irq_event { IRQ_NONE, IRQ_RISE, IRQ_FALL }
typedef void(*	gpio_irq_handler) (uint32_t id, gpio_irq_event event)
int	gpio_irq_init (gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
	Initializes the GPIO device interrupt mode, include mode/trigger/polarity registers. More...
void	gpio_irq_free (gpio_irq_t *obj)
	Deinitializes the GPIO device interrupt mode, include mode/trigger/polarity registers. More...
void	gpio_irq_set (gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
	Enable/Disable gpio interrupt. More...
void	gpio_irq_enable (gpio_irq_t *obj)
	Enable gpio interrupt. More...
void	gpio_irq_disable (gpio_irq_t *obj)
	Disable gpio interrupt. More...
void	gpio_irq_set_event (gpio_irq_t *obj, gpio_irq_event event)
	Enable the specified gpio interrupt event. More...

Detailed Description

gpio IRQ functions

Function Documentation

void gpio_irq_disable

(

gpio_irq_t *

obj

)

Disable gpio interrupt.

Parameters

obj	gpio irq object define in application software.

Return values

none

void gpio_irq_enable

(

gpio_irq_t *

obj

)

Enable gpio interrupt.

Parameters

obj	gpio irq object define in application software.

Return values

none

void gpio_irq_free

(

gpio_irq_t *

obj

)

Deinitializes the GPIO device interrupt mode, include mode/trigger/polarity registers.

Parameters

obj	gpio irq object define in application software.

Return values

none

Note

this API only works for Port A pins

int gpio_irq_init	(	gpio_irq_t *	obj,
		PinName	pin,
		gpio_irq_handler	handler,
		uint32_t	id
	)

Initializes the GPIO device interrupt mode, include mode/trigger/polarity registers.

Parameters

obj	gpio irq object define in application software.
pin	PinName according to pinmux spec.
handler	Interrupt handler to be assigned to the specified pin.
id	handler id.

Return values

none

Note

this API only works for Port A pins

void gpio_irq_set	(	gpio_irq_t *	obj,
		gpio_irq_event	event,
		uint32_t	enable
	)

Enable/Disable gpio interrupt.

Parameters

obj	gpio irq object define in application software.
event	gpio interrupt event, this parameter can be one of the following values: IRQ_RISE: rising edge interrupt event IRQ_FALL: falling edge interrupt event IRQ_LOW: low level interrupt event IRQ_HIGH: high level interrupt event IRQ_NONE: no interrupt event
enable	this parameter can be one of the following values: 0 disable gpio interrupt 1 enable gpio interrupt

Return values

none

void gpio_irq_set_event	(	gpio_irq_t *	obj,
		gpio_irq_event	event
	)

Enable the specified gpio interrupt event.

Parameters

obj	gpio irq object define in application software.
event	gpio interrupt event, this parameter can be one of the following values: IRQ_RISE: rising edge interrupt event IRQ_FALL: falling edge interrupt event IRQ_LOW: low level interrupt event IRQ_HIGH: high level interrupt event IRQ_NONE: no interrupt event

Return values

none