pic.h File Reference

#include <stdint.h>

Go to the source code of this file.

Macros
#define	PIC1   0x20 /* IO base address for master PIC */
#define	PIC2   0xA0 /* IO base address for slave PIC */
#define	PIC1_COMMAND   PIC1
#define	PIC1_DATA   (PIC1 + 1)
#define	PIC2_COMMAND   PIC2
#define	PIC2_DATA   (PIC2 + 1)

Functions
void	pic_Remap (uint8_t offset1, uint8_t offset2)
	Remaps master PIC and slave PIC to specified interupts numbers.
void	pic_EOI (unsigned char irq)
	Sends End Of Interrupt to PIC.
void	pic_SetHz (uint16_t hz)
	Sets PIT Channel 0 frequency.

Macro Definition Documentation

PIC1

#define PIC1   0x20 /* IO base address for master PIC */

PIC1_COMMAND

#define PIC1_COMMAND   PIC1

PIC1_DATA

#define PIC1_DATA   (PIC1 + 1)

PIC2

#define PIC2   0xA0 /* IO base address for slave PIC */

PIC2_COMMAND

#define PIC2_COMMAND   PIC2

PIC2_DATA

#define PIC2_DATA   (PIC2 + 1)

Function Documentation

pic_EOI()

void pic_EOI

(

unsigned char

irq

)

Sends End Of Interrupt to PIC.

Parameters

irq	Number of IRQ to EOI

References END_OF_INTERRUPT, outb(), PIC1_COMMAND, and PIC2_COMMAND.

pic_Remap()

void pic_Remap	(	uint8_t	offset1,
		uint8_t	offset2 )

Remaps master PIC and slave PIC to specified interupts numbers.

Parameters

offset1	New starting interrupt number for master PIC (IRQ 0-7)
offset2	New starting interrupt number for slave PIC (IRQ 8-15)

References ICW1_ICW4, ICW1_INIT, ICW4_8086, outb(), PIC1_COMMAND, PIC1_DATA, PIC2_COMMAND, and PIC2_DATA.

pic_SetHz()

void pic_SetHz

(

uint16_t

hz

)

Sets PIT Channel 0 frequency.

Parameters

hz	Desired PIT Hz

References outb().