BÀI 11 : ĐẾM TỪ 0 ĐẾN 9 SỬ DỤNG 2 NÚT NHẤN PIC16F887 XC8

- Đây là ảnh mô phỏng protues.

- Đây là code chương trình.

#include <stdio.h>

#include <stdlib.h>

#define _XTAL_FREQ 8000000

#include <xc.h>

// CONFIG1

#pragma config FOSC = HS        // Oscillator Selection bits (HS oscillator: High-speed crystal/resonator on RA6/OSC2/CLKOUT and RA7/OSC1/CLKIN)

#pragma config WDTE = OFF       // Watchdog Timer Enable bit (WDT disabled and can be enabled by SWDTEN bit of the WDTCON register)

#pragma config PWRTE = OFF      // Power-up Timer Enable bit (PWRT disabled)

#pragma config MCLRE = OFF      // RE3/MCLR pin function select bit (RE3/MCLR pin function is digital input, MCLR internally tied to VDD)

#pragma config CP = OFF         // Code Protection bit (Program memory code protection is disabled)

#pragma config CPD = OFF        // Data Code Protection bit (Data memory code protection is disabled)

#pragma config BOREN = OFF      // Brown Out Reset Selection bits (BOR disabled)

#pragma config IESO = OFF       // Internal External Switchover bit (Internal/External Switchover mode is disabled)

#pragma config FCMEN = OFF      // Fail-Safe Clock Monitor Enabled bit (Fail-Safe Clock Monitor is disabled)

#pragma config LVP = OFF        // Low Voltage Programming Enable bit (RB3 pin has digital I/O, HV on MCLR must be used for programming)

// CONFIG2

#pragma config BOR4V = BOR40V   // Brown-out Reset Selection bit (Brown-out Reset set to 4.0V)

#pragma config WRT = OFF        // Flash Program Memory Self Write Enable bits (Write protection off)

unsigned char  const SEGMENT_MAP[10] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};

void main(void) 

{

     ANSELbits.ANS0 = 0; // OFF ADC 

     ANSELbits.ANS1 = 0; // OFF ADC 

     TRISC = 0;           //Set PortB to all outputs

     PORTC = 0;

     TRISAbits.TRISA0 = 1;             //Set PortC.0 as input

     TRISAbits.TRISA1 = 1;

     char digit=0;

     while(1)

     {

     if (!RA0)        //Check if switch SW1 is closed

     {

     __delay_ms(100); //wait for 100ms

     if(!RA0)       //Check if switch SW1 is still closed

     {

     PORTC = (SEGMENT_MAP[digit]);

     __delay_ms(100); //Delay 1 second

     digit++;

     if (digit>9)

     digit=0;

     }

     }

     else

     {

     PORTC = (SEGMENT_MAP[digit]);         

     }

     if(!RA1)        //Check if switch SW1 is closed

     {

     __delay_ms(100); //wait for 100ms

     if(!RA1)       //Check if switch SW1 is still closed

     {

     PORTC = (SEGMENT_MAP[digit]);

     __delay_ms(100); //Delay 1 second

     digit--;

     if (digit==0)

     digit=9;

     }

     }

     else

     {

     PORTC = (SEGMENT_MAP[digit]);         

     }

    }

}

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