isr.h File Reference

#include <stdint.h>
#include <types.h>

Go to the source code of this file.

Data Structures
struct	isr_vector_t
struct	isr_nested_vector_t

Macros
#define	VECTOR_STAT   0x48
#define	VECTOR_TIMER   0x50
#define	VECTOR_SERIAL   0x58
#define	VECTOR_JOYPAD   0x60
#define	ISR_VECTOR(ADDR, FUNC)   static const isr_vector_t AT((ADDR)) __ISR_ ## ADDR = {0xc3, (void *)&(FUNC)};
#define	ISR_NESTED_VECTOR(ADDR, FUNC)   static const isr_nested_vector_t AT((ADDR)) __ISR_ ## ADDR = {{0xfb, 0xc3}, (void *)&(FUNC)};

Typedefs
typedef struct isr_vector_t	isr_vector_t
typedef struct isr_nested_vector_t	isr_nested_vector_t

Detailed Description

Macros for creating raw interrupt service routines (ISRs) which do not use the default GBDK ISR dispatcher.

Handlers installed this way will have less overhead than ones which use the GBDK ISR dispatcher.

Macro Definition Documentation

VECTOR_STAT

#define VECTOR_STAT   0x48

Address for the STAT interrupt vector

VECTOR_TIMER

#define VECTOR_TIMER   0x50

Address for the TIMER interrupt vector

VECTOR_SERIAL

#define VECTOR_SERIAL   0x58

Address for the SERIAL interrupt vector

VECTOR_JOYPAD

#define VECTOR_JOYPAD   0x60

Address for the JOYPAD interrupt vector

ISR_VECTOR

#define ISR_VECTOR	(		ADDR,
			FUNC
	)		static const isr_vector_t AT((ADDR)) __ISR_ ## ADDR = {0xc3, (void *)&(FUNC)};

Creates an interrupt vector at the given address for a raw interrupt service routine (which does not use the GBDK ISR dispatcher)

Parameters

ADDR	Address of the interrupt vector, any of: VECTOR_STAT, VECTOR_TIMER, VECTOR_SERIAL, VECTOR_JOYPAD
FUNC	ISR function supplied by the user

This cannot be used with the VBLANK interrupt.

Do not use this in combination with interrupt installers that rely on the default GBDK ISR dispatcher such as add_TIM(), remove_TIM() (and the same for all other interrupts).

Example:

#include <gb/isr.h>
 
void TimerISR() __critical __interrupt {
// some ISR code here
}
 
ISR_VECTOR(VECTOR_TIMER, TimerISR)

See also

ISR_NESTED_VECTOR, set_interrupts

ISR_NESTED_VECTOR

#define ISR_NESTED_VECTOR	(		ADDR,
			FUNC
	)		static const isr_nested_vector_t AT((ADDR)) __ISR_ ## ADDR = {{0xfb, 0xc3}, (void *)&(FUNC)};

Creates an interrupt vector at the given address for a raw interrupt service routine allowing nested interrupts

Parameters

ADDR	Address of the interrupt vector, any of: VECTOR_STAT, VECTOR_TIMER, VECTOR_SERIAL, VECTOR_JOYPAD
FUNC	ISR function

This cannot be used with the VBLANK interrupt

The LCD STAT vector (VECTOR_STAT) cannot be used in the same program as stdio.h since they install an ISR vector to the same location.

See also

ISR_VECTOR

Typedef Documentation

isr_vector_t

typedef struct isr_vector_t isr_vector_t

isr_nested_vector_t

typedef struct isr_nested_vector_t isr_nested_vector_t