#include <xc.h>

#define _XTAL_FREQ 20000000


// PIC18F4550

#pragma config IESO = OFF
#pragma config FCMEN = OFF  

#pragma config FOSC = HS // 20 MHz Quartz inserted


#pragma config PLLDIV = 5 // Divide by 5 (20MHz input)
#pragma config CPUDIV = OSC2_PLL3
#pragma config USBDIV = 2
#pragma config PWRT = ON
#pragma config BOR = OFF
#pragma config BORV = 3
#pragma config VREGEN = OFF
#pragma config WDT = OFF
#pragma config WDTPS = 1
#pragma config MCLRE = OFF
#pragma config LPT1OSC = OFF
#pragma config PBADEN = OFF // PortB enable
#pragma config CCP2MX = OFF
#pragma config STVREN = OFF
#pragma config LVP = OFF 
#pragma config ICPRT = OFF
#pragma config XINST = OFF
#pragma config DEBUG = OFF
#pragma config CP0 = OFF 
#pragma config CP1 = OFF 
#pragma config CP2 = OFF 
#pragma config CP3 = OFF
#pragma config CPD = OFF 
#pragma config CPB = OFF
#pragma config WRT0 = OFF
#pragma config WRT1 = OFF
#pragma config WRT2 = OFF
#pragma config WRT3 = OFF
#pragma config WRTB = OFF
#pragma config WRTC = OFF
#pragma config WRTD = OFF
#pragma config EBTR0 = OFF
#pragma config EBTR1 = OFF
#pragma config EBTR2 = OFF
#pragma config EBTR3 = OFF
#pragma config EBTRB = OFF

main()
{
    TRISD=0; // declare portd as output
    
    while(1)
 {
	
		PORTDbits.RD0 = 1;  // LED ON
		__delay_us(1000); // 1 Second Delay
		PORTDbits.RD0 = 0;  // LED ON
		__delay_us(1000); // 1 Second Delay
 }
}