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#include <htc.h> //__CONFIG(LVP_OFF & BOREN_OFF & PWRTE_ON & WDT_OFF & FOSC_HS); /* Low Voltage Programming Disabled (LVP_OFF) Brown Out Reset Disabled (BOREN_OFF) Power Up Timer Enabled (PWRTE_ON) Watchdog Timer Disabled (WDT_OFF) High Speed Crystal Oscillator (FOSC_HS) */ #define _XTAL_FREQ 4000000 // function prototype (every function must have a function prototype) //========================================================================== void delay(unsigned long data); // main function (main fucntion of the program) //========================================================================== void main() { unsigned long delay_time=5000; //set I/O input output TRISD = 0x00; //configure PORTB Output direction PORTD = 0x00; //set I/O input output TRISB = 0b11000000; //configure PORTB I/O direction while(1) //Infinite loop { PORTD = 0x00 ; delay_time=1000; //delay PORTD = 0xFF ; delay_time=1000; //delay } } // functions //========================================================================== void delay(unsigned long data) //delay function, the delay time { //depend on the given value for( ;data>0;data--); }