/*
 * File:   BlinkLED_1.c
 * Author: otnie
 *
 * Created on 30 September 2026, 10:58
 */

// ================= main.c =================
#include "xc.h"

// Step 1: Configuration bits (fuses) - burned into Flash at program time
#pragma config FNOSC = FRCPLL   // Start with Internal FRC + PLL
#pragma config FCKSM = CSDCMD   // Clock switching disabled
#pragma config FWDTEN = OFF   // Watchdog Timer Enabled bits (WDT disabled)

//#define _XTAL_FREQ 40000000UL   // Instruction clock = FOSC/2 = 40 MHz
#define FCY 40000000UL
#include <libpic30.h>     // Brings in __delay_ms()

int main(void) {
    // CRITICAL: Switch AN2/RB0 pin from Analog to Digital mode
    AD1PCFGLbits.PCFG2 = 1;  

    TRISBbits.TRISB0 = 0;   // RB0 = output
    LATBbits.LATB0   = 0;   // start LOW

    while (1) {
        LATBbits.LATB0 = 1;  // Turn LED ON  (HIGH = 3.3V)
        __delay_ms(800);    

        LATBbits.LATB0 = 0;     // Turn LED OFF (LOW = 0V)
        __delay_ms(200);         
    }

    return 0;
}