Practica 7 CI

#include <xc.h>
#include <stdio.h>
#include "config.h"
#include "GLCD.h"

#define TMR0_1_SEC_H 0x0B
#define TMR0_1_SEC_L 0xDB

unsigned long long freq = 0;
volatile unsigned long long ticks = 0;

void interrupt high_priority timer0_interrupt()
{
    if (INTCONbits.TMR0IE && INTCONbits.TMR0IF) {
        INTCONbits.TMR0IF = 0;
        freq = ticks + TMR1L + (TMR1H<<8);
        ticks = 0;
        //Reset TMR0
        TMR0H = TMR0_1_SEC_H;
        TMR0L = TMR0_1_SEC_L;
        //Reset TMR1
        TMR1H = 0;
        TMR1L = 0;
    }
    return;
}

void interrupt low_priority timer1_interrupt()
{
    if (PIE1bits.TMR1IE && PIR1bits.TMR1IF) {
        PIR1bits.TMR1IF = 0;
        ticks += 0xFFFF;
    }
    return;
}

void main(void)
{
    TMR0H = TMR0_1_SEC_H;
    TMR0L = TMR0_1_SEC_L;

    TMR1H = 0;
    TMR1L = 0;

    INTCONbits.TMR0IF = 0; //Clear flag
    INTCONbits.TMR0IE = 1; //Enable interrupt TIMER0
    INTCON2bits.TMR0IP = 1; //High priority

    PIR1bits.TMR1IF = 0; //Clear flag
    PIE1bits.TMR1IE = 1; //Enable interrupt TIMER1
    IPR1bits.TMR1IP = 0; //Low priority

    RCONbits.IPEN = 1; //Enable priority interrupts

    T0CON = 0b10000100;  //Enables Timer0
                //Timer0 is configured as a 16-bit timer
                //Instruction cycle clock
                //Increment on falling edge transition on T0CKI pin
                //Timer0 prescaler is assigned
                //1:32 prescaler value

    T1CON = 0b10000011; //Enable read/w rite of T im er1 in 16-bit operation
                //1:1 prescale value
                //Timer1 oscillator is shut of
                //Synchronize external clock input
                //External clock from pin R C 0/T 1O SO /T 13C K I
                //Enables T im er1

    INTCONbits.GIE = 1; //Enable global interrupts
    INTCONbits.GIEH = 1; // Enable high priority interrupts
    INTCONbits.GIEL = 1; // Enable low priority interrupts

    TRISD = 0x00;
    GLCDinit();
    clearGLCD(0, 7, 0, 127);
    char buf[32];
    char buf2[32];

    while (1) {
        sprintf(buf, "%i Hz", freq);
        sprintf(buf2, "Ticks: %i ", ticks);
        writeTxt(0, 0, buf);
        writeTxt(1, 0, buf2);
    }
}