main.c

//
// blink test for PIC18K14K50
//

#define _XTAL_FREQ 16000000 /* depends on FOSC and OSCCON */
#include <xc.h>

// configure clock
#pragma config CPUDIV=NOCLKDIV, USBDIV=OFF
#pragma config FOSC=IRC, PLLEN=OFF

// enable reset
#pragma config MCLRE=ON

// no code/data protection
#pragma config CP0=OFF, CP1=OFF, CPB=OFF, CPD=OFF

int
main(void) {
    // set clock
    OSCCON = 0x7C; // IDLEN=0, ICF=111, OSTS=1, HFIOFS=1, SCS=00
    
    TRISBbits.RB6 = 0; // RB6 as output

    for (;;) {
        PORTBbits.RB6 = 0;  // LED ON
        __delay_ms(1000);   // 1 Second Delay
        PORTBbits.RB6 = 1;  // LED OFF
        __delay_ms(1000);   // 1 Second Delay
    }
}