Maskinnära programmering 6B2266

* quad62x.c read rotary encoder with PC-terminal program */
/* SERIAL COMMUNICATION (RS232) 9600 baud. */
#include "16f628.h"
#include "Math16.h"
#pragma config |= 0x3ff0
char s[11]; /* global string buffer */
/* function prototypes */
void initserial( void ); /* in seriF62x.c */
bit putchar( char ); /* in seriF62x.c */
void string_out( void ); /* in stringIO.c */
void inttoa( int ); /* in ascnum.c */
void delay( char ); /* in delays.c */
#pragma bit quad_A @ PORTB.6
#pragma bit quad_B @ PORTB.7
#include "seriF62x.c"
#include "stringIO.c"
#include "ascnum.c"
#include "delays.c"
void main(void)
{
TRISB.6 = 1; /* quad_A is input */
TRISB.7 = 1; /* quad_B is input */
char trans; /* to store transition */
trans = 0;
int counter;
counter = 0;
delay( 10 );
initserial(); /* Initialise serial port */
putchar('\r');
putchar('\n');
while(1)
{
/* read encoder new value */
trans.0 = quad_A;
trans.1 = quad_B;
/* compare with old value */
if( trans == 0b00.01 ) counter ++;
if( trans == 0b01.00 ) counter --;
/* this is the delay between encoder readings */
inttoa( counter );
string_out();
putchar('\r'); /* Write on the same line! */
}
}
/* replace old value with new value */
trans.2 = trans.0;
trans.3 = trans.1;
Ta med filerna: seriF62x.c, stringIO.c, ascnum.c, delays.c
10