port communication More...

#include <ports.h>

Functions
	MODULE ("turnstone.kernel.hw.io.com")

uint8_t	serial_received (uint16_t port)
	checks data present at port

uint8_t	is_transmit_empty (uint16_t port)
	checks data can be sended

void	init_serial (uint16_t port)
	setups serial port

uint8_t	read_serial (uint16_t port)
	reads one byte from serial port

void	write_serial (uint16_t port, uint8_t data)
	writes one byte to serial port

Detailed Description

port communication

the functions inside this file are for port communication. the in/out functions defined at header file as inline functions.

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

Function Documentation

void init_serial ( uint16_t port )

setups serial port

Parameters

[in] port port to setups

uint8_t is_transmit_empty ( uint16_t port )

checks data can be sended

Parameters

[in] port port to check

it uses control port offset at +5 to check data can be sended.

uint8_t read_serial ( uint16_t port )

reads one byte from serial port

Parameters

[in] port port to read

uint8_t serial_received ( uint16_t port )

checks data present at port

Parameters

[in] port port to check

it uses control port offset at +5 to check data.

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