Write a (one) program for your microcontroller so that it:

1. Uses only one ISR
2. When the push button is pressed 4 times the red LED is on
3. When the push button is pressed 6 times the green LED is on
4. When the push button is pressed 8 times both the LEDs are off
5. When the push button is pressed 10 times LMP0 is off

see explaination

Explanation:

1.) Each time the main program execution starts at address 0000 - Reset Vector. The address 0004 is “reserved” for the “interrupt service routine” (ISR).

ORG 0x000 ; processor reset vector

goto main ; go to beginning of main program

ORG 0x004 ; interrupt vector location

movwf w_temp ; save off current W register contents

movf STATUS,w ; move status register into W register

movwf status_temp ; save off contents of STATUS register

.

.

RETFIE

main

3.) Push button switch is connected to the first bit of PORT B (RB0) which is configured as an input pin. When the switch is pressed this pin RB0 will be grounded. The LED is connected to the first bit of PORT B (RA0)

4.) Push button switch is connected to the first bit of PORT B (RB0) which is configured as an input pin. When the switch is pressed this pin RB0 will be grounded. The LED is connected to the first bit of PORT B (RA0)

5.) Push button switch is connected to the first bit of PORT B (RB0) which is configured as an input pin. When the switch is pressed this pin RB0 will be grounded. The LED is connected to the first bit of PORT B (RA0)

#include <stdio.h>

#include <stdlib.h>

#define _XTAL_FREQ 800000//Declare internal OSC Freq as 8MHz

#include <xc.h>

#include<pic.h>

CONFIG(FOSC_INTOSCIO & WDTE_OFF & PWRTE_OFF & MCLRE_ON & BOREN_OFF & LVP_OFF & CPD_OFF & WRT_OFF & CCPMX_RB0 & CP_OFF);

CONFIG(FCMEN_ON & IESO_ON);

unsigned int count=0;

main()

{

TRISA=0;//Sets all ports on A to be outputs

TRISB=1;//Sets all ports on B to be inputs

for(;;){

if(PORTBbits.RB0==1){//When the button is pressed the LED is off

PORTAbits.RA1 =0;

count=count+1;

}

else {

PORTAbits.RA1=1;

count = count +1;

}

if (count > 6){//if count =6 i.e 6 times button presses the RED LED turns on

PORTAbits.RA0=1;

}

else{

PORTAbits.RA0=0;

}

}

}

#include <stdio.h>

#include <stdlib.h>

#define _XTAL_FREQ 800000//Declare internal OSC Freq as 8MHz

#include <xc.h>

#include<pic.h>

CONFIG(FOSC_INTOSCIO & WDTE_OFF & PWRTE_OFF & MCLRE_ON & BOREN_OFF & LVP_OFF & CPD_OFF & WRT_OFF & CCPMX_RB0 & CP_OFF);

CONFIG(FCMEN_ON & IESO_ON);

unsigned int count=0;

main()

{

TRISA=0;//Sets all ports on A to be outputs

TRISB=1;//Sets all ports on B to be inputs

for(;;){

if(PORTBbits.RB0==1){//When the button is pressed the LED is off

PORTAbits.RA1 =0;

count=count+1;

}

else {

PORTAbits.RA1=1;

count = count +1;

}

if (count > 8){//if count =8 i.e 8 times button presses the RED LED turns on

PORTAbits.RA0=1;

}

else{

PORTAbits.RA0=0;

}

}

}

#include <stdio.h>

#include <stdlib.h>

#define _XTAL_FREQ 800000//Declare internal OSC Freq as 8MHz

#include <xc.h>

#include<pic.h>

CONFIG(FOSC_INTOSCIO & WDTE_OFF & PWRTE_OFF & MCLRE_ON & BOREN_OFF & LVP_OFF & CPD_OFF & WRT_OFF & CCPMX_RB0 & CP_OFF);

CONFIG(FCMEN_ON & IESO_ON);

unsigned int count=0;

main()

{

TRISA=0;//Sets all ports on A to be outputs

TRISB=1;//Sets all ports on B to be inputs

for(;;){

if(PORTBbits.RB0==1){//When the button is pressed the LED is off

PORTAbits.RA1 =0;

count=count+1;

}

else {

PORTAbits.RA1=1;

count = count +1;

}

if (count > 10){//if count =10 i.e 10 times button presses the RED LED turns on

PORTAbits.RA0=1;

}

else{

PORTAbits.RA0=0;

}

}

}