px_exti.h : External interrupt peripheral driver

Description

Driver for external interrupts.

File(s):

• arch/arm/stm32/inc/px_exti.h
• arch/arm/stm32/inc/px_exti_cfg_template.h
• arch/arm/stm32/src/px_exti.c

The driver must be configured by supplying a project specific "px_exti_cfg.h". "px_exti_cfg_template.h" can be copied, renamed and modified to supply compile time options.

There are only 16 external interrupts (0 to 15). If Port A pin 0 is configured as external interrupt 0 for example, then Port B pin 0 can not be configured too, because it has already been assigned to A0.

When an external interrupt is disabled, it will not detect an interrupt condition and will not set the interrupt pending flag.

Typedefs
typedef void(*	px_exti_handler_t) (void)
	Definition for a pointer to a function that will be called when the external interrupt triggers. More...

Enumerations
enum	px_exti_line_t
	External Interupt line. More...
enum	px_exti_port_t
	External interrupt port. More...
enum	px_exti_type_t
	External interrupt type. More...

Functions
void	px_exti_init (void)
	Initialise External Interrupt driver. More...
void	px_exti_open (px_exti_port_t exti_port, px_exti_line_t exti_line, px_exti_handler_t exti_handler)
	Configure External Interrupt. More...
void	px_exti_type_set (px_exti_line_t exti_line, px_exti_type_t exti_type)
	Set External Interrupt type (fallig or rising edge or both) More...
void	px_exti_enable (px_exti_line_t exti_line)
	Enable External Interrupt. More...
void	px_exti_disable (px_exti_line_t exti_line)
	Disable External Interrupt. More...

Individual enable/disable of each external interrupt (0 to 15)
#define	PX_EXTI_CFG_INT0_EN   1
#define	PX_EXTI_CFG_INT1_EN   1
#define	PX_EXTI_CFG_INT2_EN   1
#define	PX_EXTI_CFG_INT3_EN   1
#define	PX_EXTI_CFG_INT4_EN   1
#define	PX_EXTI_CFG_INT5_EN   1
#define	PX_EXTI_CFG_INT6_EN   1
#define	PX_EXTI_CFG_INT7_EN   1
#define	PX_EXTI_CFG_INT8_EN   1
#define	PX_EXTI_CFG_INT9_EN   1
#define	PX_EXTI_CFG_INT10_EN   1
#define	PX_EXTI_CFG_INT11_EN   1
#define	PX_EXTI_CFG_INT12_EN   1
#define	PX_EXTI_CFG_INT13_EN   1
#define	PX_EXTI_CFG_INT14_EN   1
#define	PX_EXTI_CFG_INT15_EN   1

Typedef Documentation

px_exti_handler_t

typedef void(* px_exti_handler_t) (void)

Definition for a pointer to a function that will be called when the external interrupt triggers.

Definition at line 142 of file px_exti.h.

Enumeration Type Documentation

px_exti_line_t

enum px_exti_line_t

External Interupt line.

Definition at line 98 of file px_exti.h.

px_exti_port_t

enum px_exti_port_t

External interrupt port.

Definition at line 119 of file px_exti.h.

px_exti_type_t

enum px_exti_type_t

External interrupt type.

Definition at line 130 of file px_exti.h.

Function Documentation

px_exti_init()

void px_exti_init

(

void

)

Initialise External Interrupt driver.

Definition at line 221 of file px_exti.c.

px_exti_open()

void px_exti_open	(	px_exti_port_t	exti_port,
		px_exti_line_t	exti_line,
		px_exti_handler_t	exti_handler
	)

Configure External Interrupt.

Parameters

exti_port	Port (A, B,C, D, E or H)
exti_line	Line (0, 1, 2, ... or 15)
exti_handler	Handler function to be called when interrupt is triggered

Definition at line 237 of file px_exti.c.

px_exti_type_set()

void px_exti_type_set	(	px_exti_line_t	exti_line,
		px_exti_type_t	exti_type
	)

Set External Interrupt type (fallig or rising edge or both)

Parameters

exti_line	Line (0, 1, 2, ... or 15)
exti_type	Falling or Rising Edge or Both

Definition at line 344 of file px_exti.c.

px_exti_enable()

void px_exti_enable

(

px_exti_line_t

exti_line

)

Enable External Interrupt.

Parameters

exti_line

Line (0, 1, 2, ... or 15)

Definition at line 369 of file px_exti.c.

px_exti_disable()

void px_exti_disable

(

px_exti_line_t

exti_line

)

Disable External Interrupt.

Parameters

exti_line

Line (0, 1, 2, ... or 15)

Definition at line 376 of file px_exti.c.