irc.h File Reference

#include <lpc21xx.h>
#include <types.h>

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Defines
#define	IRC1PIN   IO0PIN
#define	IRC1DIR   IO0DIR
#define	IRC1BIT   15
#define	IRC1PINSEL   PINSEL0
#define	IRC1PINBIT   (2*IRC1BIT)
#define	IRC2PIN   IO0PIN
#define	IRC2DIR   IO0DIR
#define	IRC2BIT   18
#define	IRC2PINSEL   PINSEL1
#define	IRC2PINBIT   (2*2)
Functions
void	irc_init ()
	update IRC1, IRC2 deglitchers' state structs, initialize IRC1,2 as GPIO inputs
int	irc_read ()
	-!- to be called @ approx.
Variables
volatile int32_t	irc1_count
volatile int32_t	irc2_count

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Define Documentation

#define IRC1BIT   15

#define IRC1DIR   IO0DIR

#define IRC1PIN   IO0PIN

#define IRC1PINBIT   (2*IRC1BIT)

#define IRC1PINSEL   PINSEL0

#define IRC2BIT   18

#define IRC2DIR   IO0DIR

#define IRC2PIN   IO0PIN

#define IRC2PINBIT   (2*2)

#define IRC2PINSEL   PINSEL1

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Function Documentation

void irc_init

(

)

update IRC1, IRC2 deglitchers' state structs, initialize IRC1,2 as GPIO inputs

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int irc_read

(

)

-!- to be called @ approx.

100kHz fixed period -!-

read IRC1,2 inputs, deglitch signal, update irc*_count variables increments on falling edge

Returns:

r; r==0: no change, r&1: IRC1 increment, r&2: IRC2 increment

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Variable Documentation

volatile int32_t irc1_count

volatile int32_t irc2_count