ports.xx.c File Reference

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 More...
uint8_t	is_transmit_empty (uint16_t port)
	checks data can be sended 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

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

init_serial()

void init_serial

(

uint16_t

port

)

setups serial port

Parameters

[in]

port

port to setups

is_transmit_empty()

uint8_t is_transmit_empty

(

uint16_t

port

)

checks data can be sended

Parameters

[in]

port

port to check

Returns

0 if data can be sended, else 1

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

read_serial()

uint8_t read_serial

(

uint16_t

port

)

reads one byte from serial port

Parameters

[in]

port

port to read

Returns

readed value

serial_received()

uint8_t serial_received

(

uint16_t

port

)

checks data present at port

Parameters

[in]

port

port to check

Returns

0 if no data, else 1

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

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