#include <avr/io.h>
#include <LiquidCrystal.h>

//LiquidCrystal(rs, enable, d4, d5, d6, d7);
LiquidCrystal lcd(8, 4, 0, 1, 2, 3); ///18=24....23=29pin

#define PWMA           6                       //19pin(OC1A)に接続
#define ADCYCLE       A5                      // A0=40pin
#define ADDUTY        A7                      // A1=39pin

unsigned long sclk = 24576000;   //システムクロック24.576MHz       long 符号無しの整数で、サイズが4byte
unsigned long frq = 1024;       // 周波数 96khz 24.576MHz/256
unsigned long frqd = 96000;       // 周波数 96khz 24.576MHz/256
unsigned int duty = 127;
unsigned int dutyd = 50;          // 指定したいデューティ比 50%  int 符号無しの整数で、サイズが2byte
char str[17];
String txt;

void setup() {
        pinMode(PWMA, OUTPUT);
        //  DDRA = 0b01011111;          ///PA
        lcd.begin(16,2);
        lcd.clear();
        lcd.setCursor(0, 0);
        //analogWrite(PWMA, 127);
        
/////////PWM タイマ1を使う ///// 
  TCCR1A = _BV(COM1A1) | _BV(WGM10);
  TCCR1B = _BV(CS10) | _BV(WGM12);
//  OCR1A = 127;
}

void loop() {
              
            frq = analogRead(ADCYCLE);
            frq = frq/4;
            if(frq <= 51){TCCR1B = (TCCR1B & 0b11111000) | 0x01; frqd = 96000;}
            else{if(frq <= 102){TCCR1B = (TCCR1B & 0b11111000) | 0x02; frqd = 12000;}
            else{if(frq <= 153){TCCR1B = (TCCR1B & 0b11111000) | 0x03;frqd = 1500;}
            else{if(frq <= 204){TCCR1B = (TCCR1B & 0b11111000) | 0x04;frqd = 375;}
            else{if(frq <= 255){TCCR1B = (TCCR1B & 0b11111000) | 0x05;frqd = 94;}  
            }}}}
                
            duty = analogRead(ADDUTY);  
            duty = duty/4;
            dutyd = duty*100/256;
            
         sprintf(str, "Cycle= %6luHz ", frqd);
           txt = str;
         lcd.setCursor(0, 0);
         lcd.print(txt);
         sprintf(str, "Duty=%3d%%  ", dutyd);
           txt = str;
         lcd.setCursor(0, 1);
         lcd.print(txt);
                
        OCR1A = duty;
        
        delay(1000);
}