ports.h File Reference

i/o port functions More...

#include <types.h>

Macros
#define	___PORTS_H   0
#define	COM1   0x03F8
#define	COM2   0x02F8
#define	COM3   0x03E8
#define	COM4   0x02E8

Functions
static void	outb (uint16_t port, uint8_t data)
	write one byte to the port More...
static uint8_t	inb (uint16_t port)
	read one byte from the port More...
static void	outw (uint16_t port, uint16_t data)
	write one word (two bytes) to the port More...
static uint16_t	inw (uint16_t port)
	read one word (two bytes) from the port More...
static void	outl (uint16_t port, uint32_t data)
	write double word (four bytes) to the port More...
static uint32_t	inl (uint16_t port)
	read double word (four bytes) from the port More...
void	init_serial (uint16_t port)
	setups serial port More...
uint8_t	read_serial (uint16_t port)
	reads one byte from serial port More...
void	write_serial (uint16_t port, uint8_t data)
	writes one byte to serial port More...

Detailed Description

i/o port functions

this functions uses inline assembly

This work is licensed under TURNSTONE OS Public License. Please read and understand latest version of Licence.

Macro Definition Documentation

___PORTS_H

#define ___PORTS_H   0

prevent duplicate header error macro

COM1

#define COM1   0x03F8

COM1 value

Function Documentation

inb()

static uint8_t inb ( uint16_t  port )

inlinestatic

read one byte from the port

Parameters

[in]

port

port to write

Returns

one byte data

init_serial()

void init_serial

(

uint16_t

port

)

setups serial port

Parameters

[in]

port

port to setups

inl()

static uint32_t inl ( uint16_t  port )

inlinestatic

read double word (four bytes) from the port

Parameters

[in]

port

port to write

Returns

double word (four bytes) data

inw()

static uint16_t inw ( uint16_t  port )

inlinestatic

read one word (two bytes) from the port

Parameters

[in]

port

port to write

Returns

one word (two bytes) data

outb()

static void outb ( uint16_t  port, uint8_t  data  )

inlinestatic

write one byte to the port

Parameters

[in]	port	port to write
[in]	data	one byte data to write

outl()

static void outl ( uint16_t  port, uint32_t  data  )

inlinestatic

write double word (four bytes) to the port

Parameters

[in]	port	port to write
[in]	data	double word (four bytes) data to write

outw()

static void outw ( uint16_t  port, uint16_t  data  )

inlinestatic

write one word (two bytes) to the port

Parameters

[in]	port	port to write
[in]	data	one word (two bytes) data to write

read_serial()

uint8_t read_serial

(

uint16_t

port

)

reads one byte from serial port

Parameters

[in]

port

port to read

Returns

readed value

write_serial()

void write_serial	(	uint16_t	port,
		uint8_t	data
	)

writes one byte to serial port

Parameters

[in]	port	port to write
[in]	data	data value to be writen