PIC16F1827をブレッドボード上で、基本回路を組んでみました。

main.c


// PIC16F1827 Configuration Bit Settings

// 'C' source line config statements

// CONFIG1
//#pragma config FOSC = HS      // Oscillator Selection (HS Oscillator, High-speed crystal/resonator connected between OSC1 and OSC2 pins)
#pragma config FOSC = INTOSC    // Oscillator Selection (INTOSC oscillator: I/O function on CLKIN pin)
#pragma config WDTE = OFF       // Watchdog Timer Enable (WDT disabled)
#pragma config PWRTE = OFF      // Power-up Timer Enable (PWRT disabled)
#pragma config MCLRE = ON       // MCLR Pin Function Select (MCLR/VPP pin function is MCLR)
#pragma config CP = OFF         // Flash Program Memory Code Protection (Program memory code protection is disabled)
#pragma config CPD = OFF        // Data Memory Code Protection (Data memory code protection is disabled)
#pragma config BOREN = ON       // Brown-out Reset Enable (Brown-out Reset enabled)
#pragma config CLKOUTEN = OFF   // Clock Out Enable (CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin)
#pragma config IESO = ON        // Internal/External Switchover (Internal/External Switchover mode is enabled)
#pragma config FCMEN = ON       // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is enabled)

// CONFIG2
#pragma config WRT = OFF        // Flash Memory Self-Write Protection (Write protection off)
#pragma config PLLEN = ON       // PLL Enable (4x PLL enabled)
#pragma config STVREN = ON      // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will cause a Reset)
#pragma config BORV = LO        // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.)
#pragma config LVP =ON      // Low-Voltage Programming Enable (Low-voltage programming enabled)

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

#include <xc.h>
#include <stdlib.h>
#include <stdio.h>
#include "Interrupt.h"
#include "Peripheral.h"

#define _XTAL_FREQ  16000000

void Oscillator_Init(void);
void Port_Init(void);

void main(void)
{    
   
    //Basic Hard Initialize
    Oscillator_Init();
    Port_Init(); 
    //Peripheral 
    Timer0_INIT();
    
    //割り込み許可
    Interrupt_START();
    
    
    while(1)
    {
        //Timer0 interrupt processing
        if(tm0.up)
        {
            tm0.up=false;
            LATBbits.LATB0=~LATBbits.LATB0;           
            INTCONbits.TMR0IE=1;
        }
    }
 
    return;
}

void Oscillator_Init(void)
{
    OSCCONbits.SPLLEN=0;
    OSCCONbits.IRCF=0b1111;//16Mhz
    OSCCONbits.SCS=0b10;//InternalOscillator
}

void Port_Init(void)
{
    TRISA=0x00;
    ANSELA=0x00;
    TRISB=0x00;     //RX:RB1
    ANSELB=0x00;
    PORTA=0x00;
    PORTB=0x00;  
}

Interrupt.h

#ifndef INTERRUPT_H
#define	INTERRUPT_H

#ifdef	__cplusplus
extern "C" {
#endif
    
    extern void __interrupt()isr();

#ifdef	__cplusplus
}
#endif

#endif	/* INTERRUPT_H */

Interrupt.c

#include <pic16f1827.h>
#include "Peripheral.h"
#include "Interrupt.h"

void __interrupt()isr()
{
    
    
    //Timer0割り込み処理
    if(INTCONbits.TMR0IE==1 && INTCONbits.TMR0IF )
    {
        INTCONbits.TMR0IF=0;
        tm0.cnt++;
        if(tm0.cnt==50)
        {
            tm0.cnt=0;
            INTCONbits.TMR0IE=0;
            tm0.up=true;
        }
        TMR0=0x63;
    }
 
   
}

Peripheral.h


#ifndef PERIPHERAL_H
#define	PERIPHERAL_H

#include <xc.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

#define _XTAL_FREQ 16000000

#ifdef	__cplusplus
extern "C" {
#endif


//************************************************//
//Timer0 8bits timer
//************************************************//
#define T0_UP 1
#define T0_STOP 0
typedef struct{
    bool up;
    uint16_t cnt;
}_tm0;    
extern _tm0 tm0;


extern void Timer0_INIT(void);

extern void Interrupt_START(void);

#ifdef	__cplusplus
}
#endif

#endif

Peripheral.c

#include <pic16f1827.h>

#include "Peripheral.h"


/*---------------------------------------------------
 Timer0     8bits　Timer　
 ---------------------------------------------------*/
_tm0 tm0;
void Timer0_INIT(void)
{
    OPTION_REGbits.TMR0CS = 0;  //ClockSource:Fosc/4
    OPTION_REGbits.PSA = 0;     //assingned to the Timer0
    OPTION_REGbits.PS = 0b111;  //1:256
    TMR0=0x63;  //Fosc:32Mhz interval time 10ms
    INTCONbits.T0IE = 1;
    tm0.cnt=0;
}

//interrupt start
void Interrupt_START(void)
{
    INTCONbits.PEIE=1;
    INTCONbits.GIE=1;
}