Question

A PIC18F4321 microcontroller is required to drive an LED connected to bit 7 of Port C based on two switch inputs connected to bits 6 and 7 of Port D. If both switches are equal (either HIGH or LOW), turn the LED ON; otherwise turn it OFF. Assume that a HIGH will turn the LED ON and a LOW will turn it OFF. Write a PIC18F C program to accomplish this requirements and copy it or upload it.

Answer 1

To drive an LED based on switch inputs connected to a microcontroller, you can write a C program specifically designed for that microcontroller. The program checks if the switch inputs are equal and accordingly turns the LED ON or OFF. The main function continuously updates the LED based on the switch inputs.

Step-by-step explanation:

To accomplish the given requirements, you can write a C program for the PIC18F4321 microcontroller. Here's an example:

#include "pic18f4321.h"

displayLED() {
if (PORTDbits.RD6 == PORTDbits.RD7) {
PORTCbits.RC7 = 1; // Turn the LED ON
} else {
PORTCbits.RC7 = 0; // Turn the LED OFF
}
}

void main() {
TRISDbits.TRISD6 = 1; // Set RD6 as input
TRISDbits.TRISD7 = 1; // Set RD7 as input
TRISCbits.TRISC7 = 0; // Set RC7 as output

while (1) {
displayLED();
}
}

This program defines a function called displayLED() that checks if the switch inputs on RD6 and RD7 are equal. If they are equal, it sets the RC7 pin to 1, turning the LED ON. If they are not equal, it sets the RC7 pin to 0, turning the LED OFF. The main() function continuously calls displayLED() to update the LED based on the switch inputs.