Question

To develop a program for the PIC 16F84A using either MPLAB X IDE simulator software. T

he PIC 16F84A has 8 LEDs connected to Port B. The program is to convert your student number (10 ASCII characters), taken in reverse order, one character at a time, to Gray code.

Each converted character is to be displayed on 4 of the LEDs connected to Port B (B0 to B3) of the microcontroller.

Further, each converted character will be displayed for 3 seconds, with the LEDs turned OFF for 1 second between each character. Once all characters have been displayed the program will continue to run with all of the Port B LEDs flashing in a pattern of Odd Numbered LEDs On and Even Numbered LEDS Off for 1 second, and then Odd Numbered LEDs Off and Even Numbered LEDS On for 1 second. This pattern will repeat indefinitely.  

Answer 1

Input code:-

int led = 13;

int led2 = 12;

int led3 = 11;

int led4 = 10;

int led5 = 9;

int led6 = 6;

int led7 = 5;

int led8 = 3;

// the setup routine runs once when you press reset:

void setup() {

// initialize the digital pin as an output.

pinMode(led, OUTPUT);

pinMode(led2, OUTPUT);

pinMode(led3, OUTPUT);

pinMode(led4, OUTPUT);

pinMode(led5, OUTPUT);

pinMode(led6, OUTPUT);

pinMode(led7, OUTPUT);

pinMode(led8, OUTPUT);

}

// the loop routine runs over and over again forever:

void loop() {

{digitalWrite(led, HIGH);

delay (15);

digitalWrite(led, LOW);

delay(15);

digitalWrite(led, HIGH);

delay(15);

digitalWrite(led, LOW);

delay(15);}

{digitalWrite(led2, HIGH);

delay (15);

digitalWrite(led2, LOW);

delay(15);

digitalWrite(led2, HIGH);

delay(15);

digitalWrite(led2, LOW);

delay(15);}

{digitalWrite(led3, HIGH);

delay (15);

digitalWrite(led3, LOW);

delay(15);

digitalWrite(led3, HIGH);

delay(15);

digitalWrite(led3, LOW);

delay(15);}

{digitalWrite(led4, HIGH);

delay (15);

digitalWrite(led4, LOW);

delay(15);

digitalWrite(led4, HIGH);

delay(15);

digitalWrite(led4, LOW);

delay(15);}

{digitalWrite(led5, HIGH);

delay (15);

digitalWrite(led5, LOW);

delay(15);

digitalWrite(led5, HIGH);

delay(15);

digitalWrite(led5, LOW);

delay(15);}

{digitalWrite(led6, HIGH);

delay (15);

digitalWrite(led6, LOW);

delay(15);

digitalWrite(led6, HIGH);

delay(15);

digitalWrite(led6, LOW);

delay(15);}

{digitalWrite(led7, HIGH);

delay (15);

digitalWrite(led7, LOW);

delay(15);

digitalWrite(led7, HIGH);

delay(15);

digitalWrite(led7, LOW);

delay(15);}

{digitalWrite(led8, HIGH);

delay (15);

digitalWrite(led8, LOW);

delay(15);

digitalWrite(led8, HIGH);

delay(15);

digitalWrite(led8, LOW);

delay(15);

{digitalWrite(led8, HIGH);

delay (15);

digitalWrite(led8, LOW);

delay(15);

digitalWrite(led8, HIGH);

delay(15);

digitalWrite(led8, LOW);

delay(15);}

{digitalWrite(led7, HIGH);

delay (15);

digitalWrite(led7, LOW);

delay(15);

digitalWrite(led7, HIGH);

delay(15);

digitalWrite(led7, LOW);

delay(15);}

{digitalWrite(led6, HIGH);

delay (15);

digitalWrite(led6, LOW);

delay(15);

digitalWrite(led6, HIGH);

delay(15);

digitalWrite(led6, LOW);

delay(15);}

{digitalWrite(led5, HIGH);

delay (15);

digitalWrite(led5, LOW);

delay(15);

digitalWrite(led5, HIGH);

delay(15);

digitalWrite(led5, LOW);

delay(15);}

{digitalWrite(led4, HIGH);

delay (15);

digitalWrite(led4, LOW);

delay(15);

digitalWrite(led4, HIGH);

delay(15);

digitalWrite(led4, LOW);

delay(15);}

{digitalWrite(led3, HIGH);

delay (15);

digitalWrite(led3, LOW);

delay(15);

digitalWrite(led3, HIGH);

delay(15);

digitalWrite(led3, LOW);

delay(15);}

{digitalWrite(led2, HIGH);

delay (15);

digitalWrite(led2, LOW);

delay(15);

digitalWrite(led2, HIGH);

delay(15);

digitalWrite(led2, LOW);

delay(15);}

{digitalWrite(led, HIGH);

delay (15);}

digitalWrite(led, LOW);

delay(15);

digitalWrite(led, HIGH);

delay(15);

digitalWrite(led, LOW);

delay(15);}

}