// PIC16F1827 Configuration Bit Settings

// 'C' source line config statements

// CONFIG1
#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 = OFF      // MCLR Pin Function Select (MCLR/VPP pin function is digital input)
#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 = OFF      // Brown-out Reset Enable (Brown-out Reset disabled)
#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 = OFF      // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is disabled)

// CONFIG2
#pragma config WRT = OFF        // Flash Memory Self-Write Protection (Write protection off)
#pragma config PLLEN = OFF      // PLL Enable (4x PLL disabled)
#pragma config STVREN = OFF     // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will not cause a Reset)
#pragma config BORV = LO        // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.)
#pragma config LVP = OFF        // Low-Voltage Programming Enable (High-voltage on MCLR/VPP must be used for programming)

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

#include <xc.h>

#define _XTAL_FREQ 8000000 //クロック動作周波数を8MHzとして__delay_msを使用する

Display7SEG(unsigned short int num);
Display7SEG_4DIG(unsigned short int number);

int main() {
    OSCCON = 0b01110100;
    TRISA = 0b00000000; //ポートAを出力に設定
    TRISB = 0b00000000; //ポートBを出力に設定
    PORTA = 0b00000000; //ポートAから0を出力
    PORTB = 0b00000000; //ポートBから0を出力

    while (1) {
       Display7SEG_4DIG(4321);
    }
}

Display7SEG_4DIG(unsigned short int number) {
    unsigned short int DIG[4];
    unsigned short int temp;

    temp = number;
    DIG[3] = temp / 1000;

    temp = number;
    DIG[2] = (temp - 1000 * DIG[3]) / 100;

    temp = number;
    DIG[1] = (temp - 1000 * DIG[3] - 100 * DIG[2]) / 10;

    temp = number;
    DIG[0] = temp - 1000 * DIG[3] - 100 * DIG[2] - 10 * DIG[1];

    PORTA = 0b11111111; //すべてのLEDを消灯
    Display7SEG(DIG[0]);
    PORTA = 0b11111110; //1桁目を表示
    __delay_ms(1);

    PORTA = 0b11111111; //すべてのLEDを消灯
    Display7SEG(DIG[1]);
    PORTA = 0b11111101; //2桁目を表示
    __delay_ms(1);

    PORTA = 0b11111111; //すべてのLEDを消灯
    Display7SEG(DIG[2]);
    PORTA = 0b11111011; //3桁目を表示
    __delay_ms(1);

    PORTA = 0b11111111; //すべてのLEDを消灯
    Display7SEG(DIG[3]);
    PORTA = 0b11110111; //4桁目を表示
    __delay_ms(1);
}

Display7SEG(unsigned short int num) {
    switch (num) {
        case 0:
            //PORTB = 0b10110111;//0　正論理
            PORTB = 0b01001000; //0　負論理
            break;

        case 1:
            //PORTB = 0b00010100;//1
            PORTB = 0b11101011; //1
            break;

        case 2:
            //PORTB = 0b01110011;//2
            PORTB = 0b10001100; //2
            break;

        case 3:
            //PORTB = 0b01110110;//3
            PORTB = 0b10001001; //3
            break;

        case 4:
            //PORTB = 0b11010100;//4
            PORTB = 0b00101011; //4
            break;

        case 5:
            //PORTB = 0b11100110;//5
            PORTB = 0b00011001; //5
            break;

        case 6:
            //PORTB = 0b11100111;//6
            PORTB = 0b00011000; //6
            break;

        case 7:
            //PORTB = 0b00110100;//7
            PORTB = 0b11001011; //7
            break;

        case 8:
            //PORTB = 0b11110111;//8
            PORTB = 0b00001000; //8
            break;

        case 9:
            //PORTB = 0b11110110;//9
            PORTB = 0b00001001; //9
            break;
    }
}