#include <xc.h>
//#include <p18f4553.h>

#pragma config PLLDIV   = 5         // Divide by 5 (20 MHz oscillator input)
#pragma config CPUDIV   = OSC1_PLL2	//[Primary Oscillator Src: /1][96 MHz PLL Src: /2]
#pragma config USBDIV   = 2         // USB clock source comes from the 96 MHz PLL divided by 2
#pragma config FOSC     = HSPLL_HS	//HS oscillator, PLL enabled (HSPLL)
#pragma config FCMEN    = OFF	//Fail-Safe Clock Monitor disabled
#pragma config IESO     = OFF	//Fail-Safe Clock Monitor disabled
#pragma config PWRT     = OFF	//PWRT disabled
#pragma config BOR      = ON	//Brown-out Reset enabled in hardware only (SBOREN is disabled)
#pragma config BORV     = 3	//Minimum setting
#pragma config VREGEN   = ON      //USB voltage regulator enabled
#pragma config WDT      = OFF	//[Watchdog Timer Enable] disabled (control is placed on the SWDTEN bit)
#pragma config WDTPS    = 32768	//Watchdog Timer Postscale Select bits 1:32768
#pragma config MCLRE    = ON	//MCLR pin enabled; RE3 input pin disabled
#pragma config LPT1OSC  = OFF	//Timer1 configured for higher power operation
#pragma config PBADEN   = OFF	//PORTB<4:0> pins are configured as digital I/O on Reset
//#pragma config CCP2MX   = ON
#pragma config STVREN   = ON		//Stack full/underflow will cause Reset
#pragma config LVP      = OFF	//Single-Supply ICSP disabled
//#pragma config ICPRT    = OFF       // Dedicated In-Circuit Debug/Programming
#pragma config XINST    = OFF       // Extended Instruction Set
#pragma config CP0      = OFF	//Block 0 (000800-001FFFh) is not code-protected
#pragma config CP1      = OFF	//Block 1 (002000-003FFFh) is not code-protected
//#pragma config CP2      = OFF
//#pragma config CP3      = OFF
#pragma config CPB      = OFF	//Boot block (000000-0007FFh) is not code-protected
//#pragma config CPD      = OFF
#pragma config WRT0     = OFF	//Block 0 (000800-001FFFh) is not write-protected
#pragma config WRT1     = OFF	//Block 1 (002000-003FFFh) is not write-protected
//#pragma config WRT2     = OFF
//#pragma config WRT3     = OFF
#pragma config WRTB     = OFF       // Boot block (000000-0007FFh) is not write-protected
#pragma config WRTC     = OFF	//Configuration registers (300000-3000FFh) are not write-protected
//#pragma config WRTD     = OFF
#pragma config EBTR0    = OFF	//Block 0 (000800-001FFFh) is not protected from table reads executed in other blocks
#pragma config EBTR1    = OFF	//Block 1 (002000-003FFFh) is not protected from table reads executed in other blocks
//#pragma config EBTR2    = OFF
//#pragma config EBTR3    = OFF
#pragma config EBTRB    = OFF	//Boot block (000000-0007FFh) is not protected from table reads executed in other blocks


#define _XTAL_FREQ  48000000             //__delay_ms
#define	SW1         PORTEbits.RE0
#define	SW2         PORTEbits.RE1
#define	LED         PORTEbits.RE2


void InitInterTimer0 (void);

int n;
unsigned char gM=0;
unsigned short gCT=0,gSP=0,gTN=200;

void init(void)
{
    ADCON1  =	0b00001111;	//全チャンネルがデジタルに設定され、VDDとVSSが選択
    TRISA   =	0b00011100;	//A0〜A4を入力に設定
    TRISB   =	0b00000000; //出力に設
    TRISC   =	0b00110000;         //D-,D+（USB用）RC4とRC5を入力に設定
    TRISD   =	0b00000000;	//D0〜D7を出力に設定
    TRISE   =   0b00000011;         //SW1,2=INPUT LED=OUTPUT
    LATA    =	0b00000000;
    LATB    =	0b00000000;
    LATC    =	0b00000000;
    LATD    =	0b00000000;
    LATE    =	0b00000000;

}

void main(void)
 {
	init();
        InitInterTimer0();

        // 割込み全体の許可
        GIE = 1;

	n = 20;
	while(1)
	{
		for ( int i = 0; i < n; i++ ) __delay_ms( 2 ); //10mS
		LED = !LED;
		if(SW2 == 0)
		{
                    gM=1;
			n = n+1;
			if (n >= 20)
			{
				n = 1;
			}
                        gSP--;
                        if(gSP<0){gSP=0;}
		}
		if(SW1 == 0)
		{
                    gM=0;
			n = n-1;
			if (n <= 1)
			{
				n = 20;
			}
                        gSP++;
                        if(gSP>99){gSP=99;}
		}
                
	}
}

// タイマ0割込み設定関数
void InitInterTimer0 (void)
{
    // クロック源を内部クロックに設定
    T0CS = 0;
    // プリスケーラをタイマ0に割り当て
    PSA = 0;
    // プリスケーラ値を16に設定=割込み周波数＝48MHｚ/（4*256*16）＝2930Hz
    T0CONbits.T0PS0 = 1;//PIC18F4553
    T0CONbits.T0PS1 = 1;//PIC18F4553
    T0CONbits.T0PS2 = 0;//PIC18F4553
    // TMR0レジスタをクリア
    TMR0 = 0x0000;
    // タイマ0割込みフラグをクリア
    T0IF = 0;
    // タイマ0割込みの許可
    T0IE = 1;
}

void interrupt SYS_InterruptHigh(void)
{
    if(T0IF == 1)
    {
        switch (gM)
        {
	case 0:
            if(gCT<gTN/2+gSP)
            {
                PORTD=0X06;
            }
            else
            {
                PORTD=0X09;
            }
            gCT++;
		break;
	case 1:
            if(gCT<gTN/2-gSP)
            {
                PORTD=0X06;
            }
            else
            {
                PORTD=0X09;
            }
            gCT++;
		break;
	default:
		break;
        }
        if(gCT>gTN){gCT=0;}

        // タイマ0割込みフラグをクリア
        T0IF = 0;
    }
}