// PIC16F88 Configuration Bit Settings

// ‘C’ source line config statements

// CONFIG1
#pragma config FOSC = INTOSCIO // Oscillator Selection bits (INTRC oscillator; port I/O function on both RA6/OSC2/CLKO pin and RA7/OSC1/CLKI pin)
#pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT disabled)
#pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config MCLRE = OFF // RA5/MCLR/VPP Pin Function Select bit (RA5/MCLR/VPP pin function is digital I/O, MCLR internally tied to VDD)
#pragma config BOREN = OFF // Brown-out Reset Enable bit (BOR disabled)
#pragma config LVP = OFF // Low-Voltage Programming Enable bit (RB3 is digital I/O, HV on MCLR must be used for programming)
#pragma config CPD = OFF // Data EE Memory Code Protection bit (Code protection off)
#pragma config WRT = OFF // Flash Program Memory Write Enable bits (Write protection off)
#pragma config CCPMX = RB3 // CCP1 Pin Selection bit (CCP1 function on RB0)
#pragma config CP = OFF // Flash Program Memory Code Protection bit (Code protection off)

// CONFIG2
#pragma config FCMEN = OFF // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor disabled)
#pragma config IESO = OFF // Internal External Switchover bit (Internal External Switchover mode disabled)

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

#include <xc.h>

//////////delay関数を使うために定義　8Mhz////////////
#define _XTAL_FREQ 8000000

int count;
int i;

//外部割込みプログラム　スイッチが押されるとここに飛ぶ
void interrupt gaibuwarikomi(void) {
//スイッチが押されれば視覚的にわかるようにLEDが一瞬点灯する↓
//チャタリング防止のためにもdelayを入れてる
RA3 = 1;
__delay_ms(300);
RA3 = 0;

//COUNTをカウントする
if (count == 0){
//15kHz
count = count+1;
RA1 = 1;
RA7 = 0;
RB7 = 0;
RB5 = 0;
RB4 = 0;

}else if(count == 1){
//16kHz
count = count+1;
RA1 = 0;
RA7 = 1;
RB7 = 0;
RB5 = 0;
RB4 = 0;


}else if(count == 2){
//17kHz
count = count+1;
RA1 = 0;
RA7 = 0;
RB7 = 1;
RB5 = 0;
RB4 = 0;


}else if(count == 3){
//18kHz
count = count+1;
RA1 = 0;
RA7 = 0;
RB7 = 0;
RB5 = 1;
RB4 = 0;


}else if(count == 4){
//19kHz
count = count+1;
RA1 = 0;
RA7 = 0;
RB7 = 0;
RB5 = 0;
RB4 = 1;

}else if(count == 5){
//出力停止
count = 0;
RA1 = 0;
RA7 = 0;
RB7 = 0;
RB5 = 0;
RB4 = 0;


}

INTCONbits.INTF = 0;//割込みフラグクリア

}

void main(void) {

OSCCON = 0b01110000;//内部発信　8MHzに設定

//すべてデジタルで使用する
ANSEL = 0b00000000;

//Aポートはすべて出力設定
TRISA = 0b00000000;

//Bポート　RB0だけ入力　あとは出力設定
TRISB = 0b00000001;

PORTA = 0;//クリア
PORTB = 0;//クリア




INTCONbits.GIE = 0;//グローバル割り込み不許可
INTCONbits.INTE = 0;//RB0/INT 割り込みを不許可
OPTION_REGbits.INTEDG =0;//外部割込み　立下りを検知
INTCONbits.INTF = 0;//割込みフラグをクリア

count = 0;//クリア


//最初の動作2.5秒かけてLEDが点滅して起動する
RA3 = 1;
__delay_ms(500);
RA3 = 0;
__delay_ms(500);
RA3 = 1;
__delay_ms(500);
RA3 = 0;
__delay_ms(500);
RA3 = 1;
__delay_ms(500);
RA3 = 0;


//外部割込みが入るように設定
INTCONbits.GIE = 1;//全割込みを許可
INTCONbits.INTE = 1;//外部割込みを許可



//メインループ
while (1) {
while(count == 0)
{
NOP();//外部割込みスイッチが押されないと永遠ここ
}


/*
//13kHz
while(count == 1){

RA2 = 1;
__delay_us(39);
RA2 = 0;
__delay_us(39);


}
//14kHz
while(count == 2){
RA2 = 1;
__delay_us(33);
RA2 = 0;
__delay_us(33);
}

*/

//15kHz
while(count == 1){
RA2 = 1;
__delay_us(33);
RA2 = 0;
__delay_us(33);
}

//16kHz
while(count == 2){
RA2 = 1;
__delay_us(31);
RA2 = 0;
__delay_us(31);
}

//17kHz
while(count == 3){
RA2 = 1;
__delay_us(29);
RA2 = 0;
__delay_us(29);
}

//18kHz
while(count == 4){
RA2 = 1;
__delay_us(27);
RA2 = 0;
__delay_us(27);
}

//19kHz
while(count == 5){
RA2 = 1;
__delay_us(26);
RA2 = 0;
__delay_us(26);
}

/*
//20kHz
while(count == 8){
RA2 = 1;
__delay_us(25);
RA2 = 0;
__delay_us(25);
}
*/

}
return;
}