jt_direct_io.c File Reference

#include <stdlib.h>
#include <string.h>

Functions

• int ioperm (unsigned long from, unsigned long num, int permit)

Variables

• unsigned port_base = PORT_BASE

  LPT port address.
  

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Detailed Description

ioperm wrapper functions

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Function Documentation

int ioperm	(	unsigned long	from,
		unsigned long	num,
		int	permit
	)

try to get access to a range of IO-Ports

Parameters:

	from	IO-Port start address
	num	requested number of byte addresses
	permit	1=enable access; 0=disable access

Return values:

	0	OK
	-1	Failure

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Variable Documentation

unsigned port_base = PORT_BASE

LPT port address.

Referenced by main(), and parseParameter().