Question

Write a program for the ds89c420 to toggle all the bits of p0, p1, and p2 every 1/4 of a second

Answer 1

Answer :

Explanation :

Here is an example program in C for the DS89C420 microcontroller to toggle all the bits of P0, P1, and P2 every 1/4 of a second:

#include <REG89C420.H>

void delay() {

 unsigned int i, j;

 for(i = 0; i < 500; i++) {

   for(j = 0; j < 1000; j++) {

     // delay loop

   }

 }

}

void main() {

 while(1) {

   // toggle all bits of P0

   P0 = ~P0;

   

   // toggle all bits of P1

   P1 = ~P1;

   

   // toggle all bits of P2

   P2 = ~P2;

   

   // wait for 1/4 of a second

   delay();

 }

}

This program uses a simple delay function to wait for 1/4 of a second before toggling the bits of P0, P1, and P2. The ~ operator is used to invert the bits of each port. The program runs in an infinite loop, so the bits will continue to toggle every 1/4 of a second.

To know more about the concept please go through the links :

https://brainly.in/question/8460078

https://brainly.in/question/31364625

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