Untitled

/* 
 * File:   main.c
 * Author: kphan4
 *
 * Created on August 30, 2024
 */

#include <xc.h>
#include "lcd_display_driver.h"
#include <sys/attribs.h>

#define CHARS 3

char name[CHARS] = "PHA"; //Khoi Phan
char second[CHARS] = "BBB";

void __ISR(_CHANGE_NOTICE_VECTOR, IPL3SOFT) ChaewoN (void){
    
    //display_driver_use_second_line();
    
    if(PORTDbits.RD7 == 0){ //S6 first char
        if(second[0] == 'Z') second[0] = 'A';
        else second[0]++;
//        LATAbits.LATA0 = 1;
        display_driver_use_second_line();
        lcd_display_driver_write(second, CHARS);
    }
    
    if(PORTDbits.RD13 == 0){ //S4 third char.
        if(second[2] == 'Z') second[2] = 'A';
        else second[2]++;
//        LATAbits.LATA1 = 1;
        display_driver_use_second_line();
        lcd_display_driver_write(second, CHARS);
    }
    
    if(PORTDbits.RD6 == 0){ //S3 reset.
        int i;
        for(i = 0; i < CHARS; i++){
            second[i] = 'B';
        }
//        LATAbits.LATA2 = 1;
        display_driver_use_second_line();
        lcd_display_driver_write(second, CHARS);
    }
    
    IFS1bits.CNIF = 0;
    
}

void __ISR(_EXTERNAL_2_VECTOR, IPL2SOFT) Chaezer0 (void){
    
    if(second[1] == 'Z') second[1] = 'A';
    else second[1]++;
    display_driver_use_second_line();
    lcd_display_driver_write(second, CHARS);
    IFS0bits.INT2IF = 0;
    
}

void main(void){
    
    // Enable JTAG.
    DDPCONbits.JTAGEN = 0; 
    // Setting tri-state registers for output.
    TRISBbits.TRISB15 = 0;
    TRISD = 0xCF;
    TRISE = 0xFF00;
    // Interrupt settings.
    INTCONbits.MVEC = 1; // Enable multi-vector mode.
    __builtin_disable_interrupts(); // Disable interrupts.
    CNCONbits.ON = 1; // Turns on CN interrupt.
    // Sets up switches S3, S4, S6.
    CNENbits.CNEN15 = 1;
    CNENbits.CNEN16 = 1;
    CNENbits.CNEN19 = 1;
    IPC6bits.CNIP = 3;
    IPC6bits.CNIS = 1;
    IFS1bits.CNIF = 0;
    IEC1bits.CNIE = 1;
    INTCONbits.INT2EP = 0; // INT2 (S5) triggers on falling edge.
    IPC2bits.INT2IP = 2; // Priority = 3.
    IPC2bits.INT2IS = 1; // Sub-prio = 1.
    IFS0bits.INT2IF = 0; // Clear interrupt flag.
    IEC0bits.INT2IE = 1; // Enable INT2.
    __builtin_enable_interrupts(); // Enable interrupts.
    
    lcd_display_driver_initialize();
    
    
    display_driver_use_first_line();
    lcd_display_driver_write(name, CHARS);
    
    
    display_driver_use_second_line();
    lcd_display_driver_write(second, CHARS);
    
    //For debugging
//    LATAbits.LATA0 = 0;
//    LATAbits.LATA1 = 0;
//    LATAbits.LATA2 = 0;
//    LATAbits.LATA3 = 0;
//    TRISAbits.TRISA0 = 0;
//    TRISAbits.TRISA1 = 0;
//    TRISAbits.TRISA2 = 0;
//    TRISAbits.TRISA3 = 0;
    
    
    while(1){;}
    
    return;
    
}