Chapter 2 PIC 16F887 Microcontroller

CHAPTER 2PIC 16F887 MICROCONTROLLEREng. Hazem W. Marar

PIC 16F887

PORTS

ANALOG PINS

IN MIKROC

ANSEL AND ANSELH

TURN LED ON

void main(){TRISB = 0 ; // set PORTB as OUTPUTPORTB = 0xff; // turn all LEDs ON}

WRITE A CODE TO TOGGLE AN LED

DELAYS void main( )

{TRISB = 0 ; // set PORTB as OUTPUT

While(1) // forever{PORTB = 0xff ; // turn all LEDs ON

Delay_ms(500) ; // wait 500 ms

PORTB = 0 ; // turn all LEDs OFF

Delay_ms(500) ; // wait 500 ms}}

USE AN INPUT SIGNAL (PUSH BUTTON) TO CONTROL AN LED

INPUT SIGNAL void main( )

{TRISB = 0x01 ; // set 1st bit of PORTB as INPUT

While(1) // forever{

if(PORTB.F0 ==1){

PORTB.F1 = 1;}

if(PORTB.F0 ==0){

PORTB.F1 = 0;}

}}

USE AN INPUT SIGNAL (PUSH BUTTON) TO TOGGLE AN LED

TOGGLE

unsigned short LastButton =0;

void main(){

TRISC = 0x01 ;

PORTC=0x00;

while(1) {

if(PORTC.F0 ==1 && LastButton ==0)

{PORTC.F1=~PORTC.F1;

LastButton=1;}

else

{LastButton = PORTC.F0;

} } }

BOUNCING EFFECT

unsigned short current;

unsigned short debounce ( )

{ current = PORTB.F0; if( LastButton != current) { delay_ms(5); current = PORTB.F0;} return current;}

USE PUSH BUTTONS TO CHANGE FLASHING DELAYS

USE A SINGLE PUSH BUTTON TO CHANGE FLASHING DELAYS

MANAGING INDIVIDUAL BITS

USE AN INPUT SIGNAL (PUSH BUTTON) TO CONTROL A LED MATRIX

USE PUSH BUTTONS TO CONTROL MULTIPLE LED MATRICES

LAB EXERCISEChapter 2