Exemplo circuito INT0 TIMER

Registrador TIMER1

Registradores TIMER PIC18F4550

Registradores

Registradores Associados ao TIMER1

Registradores associados a Interrupção  INTCON

Registrador INTCON2

Interrupção e TIMER1 no PIC18F4550

/*
 * File:   intetimer.c
 * Author: Administrador
 *
 * Created on 29 de Setembro de 2014, 16:42
 */

// PIC18F4550 Configuration Bit Settings

// 'C' source line config statements

#include <xc.h>

// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.

// CONFIG1L
#pragma config PLLDIV = 1       // PLL Prescaler Selection bits (No prescale (4 MHz oscillator input drives PLL directly))
#pragma config CPUDIV = OSC1_PLL2// System Clock Postscaler Selection bits ([Primary Oscillator Src: /1][96 MHz PLL Src: /2])
#pragma config USBDIV = 1       // USB Clock Selection bit (used in Full-Speed USB mode only; UCFG:FSEN = 1) (USB clock source comes directly from the primary oscillator block with no postscale)

// CONFIG1H
#pragma config FOSC = HS        // Oscillator Selection bits (HS oscillator (HS))
#pragma config FCMEN = OFF      // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor disabled)
#pragma config IESO = OFF       // Internal/External Oscillator Switchover bit (Oscillator Switchover mode disabled)

// CONFIG2L
#pragma config PWRT = OFF       // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOR = ON         // Brown-out Reset Enable bits (Brown-out Reset enabled in hardware only (SBOREN is disabled))
#pragma config BORV = 3         // Brown-out Reset Voltage bits (Minimum setting)
#pragma config VREGEN = OFF     // USB Voltage Regulator Enable bit (USB voltage regulator disabled)

// CONFIG2H
#pragma config WDT = OFF        // Watchdog Timer Enable bit (WDT disabled (control is placed on the SWDTEN bit))
#pragma config WDTPS = 32768    // Watchdog Timer Postscale Select bits (1:32768)

// CONFIG3H
#pragma config CCP2MX = ON      // CCP2 MUX bit (CCP2 input/output is multiplexed with RC1)
#pragma config PBADEN = ON      // PORTB A/D Enable bit (PORTB<4:0> pins are configured as analog input channels on Reset)
#pragma config LPT1OSC = OFF    // Low-Power Timer 1 Oscillator Enable bit (Timer1 configured for higher power operation)
#pragma config MCLRE = ON       // MCLR Pin Enable bit (MCLR pin enabled; RE3 input pin disabled)

// CONFIG4L
#pragma config STVREN = ON      // Stack Full/Underflow Reset Enable bit (Stack full/underflow will cause Reset)
#pragma config LVP = OFF        // Single-Supply ICSP Enable bit (Single-Supply ICSP disabled)
#pragma config ICPRT = OFF      // Dedicated In-Circuit Debug/Programming Port (ICPORT) Enable bit (ICPORT disabled)
#pragma config XINST = OFF      // Extended Instruction Set Enable bit (Instruction set extension and Indexed Addressing mode disabled (Legacy mode))

// CONFIG5L
#pragma config CP0 = OFF        // Code Protection bit (Block 0 (000800-001FFFh) is not code-protected)
#pragma config CP1 = OFF        // Code Protection bit (Block 1 (002000-003FFFh) is not code-protected)
#pragma config CP2 = OFF        // Code Protection bit (Block 2 (004000-005FFFh) is not code-protected)
#pragma config CP3 = OFF        // Code Protection bit (Block 3 (006000-007FFFh) is not code-protected)

// CONFIG5H
#pragma config CPB = OFF        // Boot Block Code Protection bit (Boot block (000000-0007FFh) is not code-protected)
#pragma config CPD = OFF        // Data EEPROM Code Protection bit (Data EEPROM is not code-protected)

// CONFIG6L
#pragma config WRT0 = OFF       // Write Protection bit (Block 0 (000800-001FFFh) is not write-protected)
#pragma config WRT1 = OFF       // Write Protection bit (Block 1 (002000-003FFFh) is not write-protected)
#pragma config WRT2 = OFF       // Write Protection bit (Block 2 (004000-005FFFh) is not write-protected)
#pragma config WRT3 = OFF       // Write Protection bit (Block 3 (006000-007FFFh) is not write-protected)

// CONFIG6H
#pragma config WRTC = OFF       // Configuration Register Write Protection bit (Configuration registers (300000-3000FFh) are not write-protected)
#pragma config WRTB = OFF       // Boot Block Write Protection bit (Boot block (000000-0007FFh) is not write-protected)
#pragma config WRTD = OFF       // Data EEPROM Write Protection bit (Data EEPROM is not write-protected)

// CONFIG7L
#pragma config EBTR0 = OFF      // Table Read Protection bit (Block 0 (000800-001FFFh) is not protected from table reads executed in other blocks)
#pragma config EBTR1 = OFF      // Table Read Protection bit (Block 1 (002000-003FFFh) is not protected from table reads executed in other blocks)
#pragma config EBTR2 = OFF      // Table Read Protection bit (Block 2 (004000-005FFFh) is not protected from table reads executed in other blocks)
#pragma config EBTR3 = OFF      // Table Read Protection bit (Block 3 (006000-007FFFh) is not protected from table reads executed in other blocks)

// CONFIG7H
#pragma config EBTRB = OFF      // Boot Block Table Read Protection bit (Boot block (000000-0007FFh) is not protected from table reads executed in other blocks)


#include <stdio.h>
#include <stdlib.h>


#include<pic18.h>
#include<stdio.h>
#include<stdlib.h>
#include<delays.h>
#define _XTAL_FREQ 20000000
unsigned char cont = 0;

void main(void) {
    TRISCbits.TRISC0 = 0;
    TRISCbits.TRISC1 = 0;
    PORTCbits.RC0 = 0;
    PORTCbits.RC1 = 0;
    INTCONbits.PEIE = 1;
    INTCONbits.INT0E = 1;
    INTCONbits.GIE = 1;
    INTCON2bits.INTEDG0 = 0;
    PIE1bits.TMR1IE = 1;
    T1CONbits.TMR1ON = 1;
    T1CONbits.TMR1CS = 0;
    T1CONbits.T1CKPS0 = 1;
    T1CONbits.T1CKPS1 = 1;

    ADCON1 = 0x0F;


    while (1);
}

void interrupt Interrupt()
    {
    if (INTCONbits.INT0F)
    {

        PORTCbits.RC1 = ~PORTCbits.RC1;
        INTCONbits.INT0F = 0;
    }

    if (PIR1bits.TMR1IF)
    {
        //4/20MHz = 0,2us (cilco de máquina) bit1  TMR1CS
        //65536 - 3036 = 62500 (contagem) Timer 1 16 bits contagem ate 65535
        // prescaler = 8 foi definido bit 4 e 5 Timer1 1:8
        // t = ciclo de maquina * contagem * prescaler
        // t = 0,2 * 8 * 62500 = 100000us = 100ms contagem pelo timer
        TMR1 = 3035;//colocamos este valor pois o tempo começa daqui are 65535
        if (cont > 4) //com TIMER1 conseguimos 100ms fazer 4 vezes da 400 ms
        {
            PORTCbits.RC0 = ~PORTCbits.RC0;
            cont = 0;
        }

        cont++;
        PIR1bits.TMR1IF = 0;
    }


     }