To write a C program to transfer the data in the switch to the LED using I/O Ports in PIC.

Aim:

To write a C program to transfer the data in the switch to the LED using I/O Ports in PIC.

Algorithm.

Step 1: Start the program

Step 2: Choose a GPIO pin from any port (RB0)

Step 3: Make RB0 value HIGH

Step 4: Make a delay

Step 5: Make RB0 value LOW

Step 6: Make a delay

Step 7: Repeat the process

Program:

#include<18F8722.h>

#use delay(clock=20000000)

#use rs232(baud=19200,xmit=PIN_C6,rcv=PIN_C7)

#fuses HS,NOWDT,NOBROWNOUT

int sw_val=0x00;

void main()

{

unsigned char value1=0,j,i;

SET_TRIS_D (0xff);

while(1)

{

sw_val = input_d();

value1=0;

for(i=0,j=7;i<8;i++,j--)

{

value1 |= (((sw_val>>i)&0x01)<<j);

}

output_f(value1);

printf("\n\r Switch1 = %x ",value1);

}

}