Port I/O APIs

Functions
static void	sys_out8 (uint8_t data, io_port_t port)
	Output a byte to an I/O port.
static uint8_t	sys_in8 (io_port_t port)
	Input a byte from an I/O port.
static void	sys_out16 (uint16_t data, io_port_t port)
	Output a 16 bits to an I/O port.
static uint16_t	sys_in16 (io_port_t port)
	Input 16 bits from an I/O port.
static void	sys_out32 (uint32_t data, io_port_t port)
	Output 32 bits to an I/O port.
static uint32_t	sys_in32 (io_port_t port)
	Input 32 bits from an I/O port.
static void	sys_io_set_bit (io_port_t port, unsigned int bit)
	Set the designated bit from port to 1.
static void	sys_io_clear_bit (io_port_t port, unsigned int bit)
	Clear the designated bit from port to 0.
static int	sys_io_test_bit (io_port_t port, unsigned int bit)
	Test the bit from port if it is set or not.
static int	sys_io_test_and_set_bit (io_port_t port, unsigned int bit)
	Test the bit from port and set it.
static int	sys_io_test_and_clear_bit (io_port_t port, unsigned int bit)
	Test the bit from port and clear it.

Detailed Description

Function Documentation

sys_in16()

uint16_t sys_in16 ( io_port_t port )

inlinestatic

#include <zephyr/sys/sys_io.h>

Input 16 bits from an I/O port.

This function reads 16 bits from the port.

Parameters

port	the port address from where to read the 16 bits

Returns

the 16 bits read

sys_in32()

uint32_t sys_in32 ( io_port_t port )

inlinestatic

#include <zephyr/sys/sys_io.h>

Input 32 bits from an I/O port.

This function reads 32 bits from the port.

Parameters

port	the port address from where to read the 32 bits

Returns

the 32 bits read

sys_in8()

uint8_t sys_in8 ( io_port_t port )

inlinestatic

#include <zephyr/sys/sys_io.h>

Input a byte from an I/O port.

This function reads a byte from the port.

Parameters

port	the port address from where to read the byte

Returns

the byte read

sys_io_clear_bit()

void sys_io_clear_bit ( io_port_t port, unsigned int bit )

inlinestatic

#include <zephyr/sys/sys_io.h>

Clear the designated bit from port to 0.

This functions takes the designated bit starting from port and sets it to 0.

Parameters

port	the port address from where to look for the bit
bit	the designated bit to clear (from 0 to n)

sys_io_set_bit()

void sys_io_set_bit ( io_port_t port, unsigned int bit )

inlinestatic

#include <zephyr/sys/sys_io.h>

Set the designated bit from port to 1.

This functions takes the designated bit starting from port and sets it to 1.

Parameters

port	the port address from where to look for the bit
bit	the designated bit to set (from 0 to n)

sys_io_test_and_clear_bit()

int sys_io_test_and_clear_bit ( io_port_t port, unsigned int bit )

inlinestatic

#include <zephyr/sys/sys_io.h>

Test the bit from port and clear it.

This functions takes the designated bit starting from port, tests its current setting and clears it. It will return the previous setting.

Parameters

port	the port address from where to look for the bit
bit	the designated bit to test and clear (from 0 to n)

Returns

0 if it was clear, 1 otherwise

sys_io_test_and_set_bit()

int sys_io_test_and_set_bit ( io_port_t port, unsigned int bit )

inlinestatic

#include <zephyr/sys/sys_io.h>

Test the bit from port and set it.

This functions takes the designated bit starting from port, tests its current setting and sets it. It will return the previous setting.

Parameters

port	the port address from where to look for the bit
bit	the designated bit to test and set (from 0 to n)

Returns

1 if it was set, 0 otherwise

sys_io_test_bit()

int sys_io_test_bit ( io_port_t port, unsigned int bit )

inlinestatic

#include <zephyr/sys/sys_io.h>

Test the bit from port if it is set or not.

This functions takes the designated bit starting from port and tests its current setting. It will return the current setting.

Parameters

port	the port address from where to look for the bit
bit	the designated bit to test (from 0 to n)

Returns

1 if it is set, 0 otherwise

sys_out16()

void sys_out16 ( uint16_t data, io_port_t port )

inlinestatic

#include <zephyr/sys/sys_io.h>

Output a 16 bits to an I/O port.

This function writes a 16 bits to the given port.

Parameters

data	the 16 bits to write
port	the port address where to write the 16 bits

sys_out32()

void sys_out32 ( uint32_t data, io_port_t port )

inlinestatic

#include <zephyr/sys/sys_io.h>

Output 32 bits to an I/O port.

This function writes 32 bits to the given port.

Parameters

data	the 32 bits to write
port	the port address where to write the 32 bits

sys_out8()

void sys_out8 ( uint8_t data, io_port_t port )

inlinestatic

#include <zephyr/sys/sys_io.h>

Output a byte to an I/O port.

This function writes a byte to the given port.

Parameters

data	the byte to write
port	the port address where to write the byte