Pic16F877 8255 port çoklama...

[ahmet2004]

/* Hitech C v9.50PL2            */
/* Yazan tyilgin1 Yüzbaşı       */
/* Düzenleyen By Ahmet      */

#include <htc.h>
#define XTAL_FREQ	4

__CONFIG(UNPROTECT & WDTDIS & PWRTEN & XT);

#define	i8255_RD		RC0
#define	i8255_WR		RC1
#define	i8255_a0		RC2
#define	i8255_a1		RC3
#define	i8255_Reset		RC4
#define	i8255_CS		RC6


#include "delay.h"
#include "Devre.h"

void main(void) {

unsigned char sayac;

	TRISA = 0b00000000;
	TRISB = 0b00000000;
	TRISC = 0b00000000;
	TRISD = 0b00000000;
	TRISE = 0b00000000;
	
	OPTION=0b10000010;
	INTCON=0b00000000;
	
	ADCON1=7;
		
	PORTA=0; PORTB=0; PORTC=0x40; PORTD=0;
	
	DelayMs(250);

	i8255_RD	= 1;
	i8255_WR	= 0;
	i8255_Reset = 0;
	i8255_CS	= 0;
	
	PORTB    = 0b10000000;
	i8255_a0 = 1;
	i8255_a1 = 1;
	i8255_CS = 0;
	DelayMs(1);
	i8255_CS = 1;

	while(1) 
	{
	i8255_CS	= 0;
	i8255_WR	= 1;


		for (sayac=0;sayac<2;sayac++)
		{
			DelayMs(250); DelayMs(250);
			i8255_WR	= 0;
			i8255_a0	= 0;
			i8255_a1	= 0;
			if (sayac==0)
			{
			portCIK0();
			}
			else
			{
			portCIK1();
			}
			i8255_WR	= 1;

			i8255_WR	= 0;
			i8255_a0	= 1;
			i8255_a1	= 0;
			if (sayac==0)
			{
			portCIK0();
			}
			else
			{
			portCIK1();
			}
			i8255_WR	= 1;

			i8255_WR	= 0;
			i8255_a0	= 0;
			i8255_a1	= 1;
			if (sayac==0)
			{
			portCIK0();
			}
			else
			{
			portCIK1();
			}
			i8255_WR	= 1;
	}

	}
}

void portCIK0()
		{
		  PORTB=0x55;
		}

void portCIK1()
		{
		  PORTB=0xAA;
		}

[ahmet2004]

Devre Animasyonu:



Proteus ve hex kodları:

http://www.4shared.com/file/67370190/b686cabc/8255portCoklama_ahmet2004.html

[parametre]

kodlari baska siteye yukleme imkanı yokmudur oradan indiremiyoruz tşk ederiz

[Maxim]

iyi okuyun
orada zaten kod yok, hex var.
kod ilk mesajda ..