#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
//#include <stdio.h>
//#include "pico/stdlib.h"
//#include "hardware/gpio.h"
//#include "hardware/pwm.h"

#define QH  16    // データの入力ピン(74HC165-QH). GP16
#define CK  28     // クロック出力ピン(74HC165-CK/CP).  GP28
#define SL  27     // レジスタロードピン(74HC165-SL/PL) GP27
//参考　http://zattouka.net/GarageHouse/micon/circuit/HC165.htm$0

const int dataPin = 0;   /* Q7 */
const int clockPin = 2;  /* CP */
const int latchPin = 1;  /* PL */
const int numBits = 8;   /* Set to 8 * number of shift registers */

const int ledpin = 17;
int Outdatapin = 13; 
int Outclockpin = 15;
int Outlatchpin = 14;

int state;
byte ShiftData ;
const int pulseWidth = 10;      // pulse width in microseconds

byte data = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello,again ");
  pinMode(dataPin, INPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);

  pinMode(Outdatapin, OUTPUT);
  pinMode(Outclockpin, OUTPUT);  
  pinMode(Outlatchpin, OUTPUT);
  pinMode(ledpin, OUTPUT);
  
  lcd.begin(16, 2);
  lcd.print("Hello1");

  lcd.setCursor(2, 1);
  lcd.print(dataPin);
  lcd.print(clockPin);
}

void loop() {
  delay(10);

// put your main code here, to run repeatedly:
  //byte dt ;


  // Step 1: Sample
  digitalWrite(latchPin, LOW);
  digitalWrite(latchPin, HIGH);

   // Step 2: Shift
  Serial.print("Bits: ");
  for (int i = 0; i < numBits; i++) {
    int bit = digitalRead(dataPin);
    if (bit == HIGH) {
      Serial1.print("1");
    } else {
      Serial1.print("0");
    }
    digitalWrite(clockPin, HIGH); // Shift out the next bit
    delayMicroseconds( pulseWidth);
    digitalWrite(clockPin, LOW);

  }
  //lcd.print(state);
oneAfterAnother();      // All on, all off

  Serial.println();
//  delay(1000);

  state =state+1;
  if(state>=50 && state<51){
    digitalWrite(ledpin, HIGH); 
      lcd.setCursor(2, 1);
  lcd.print("1");
  }else if( state>=100){
      lcd.setCursor(2, 1);
  lcd.print("> Pi Pico! <");
    digitalWrite(ledpin,LOW);
    state = 0;
  }
}

void shiftWrite(int desiredPin, boolean desiredState){

// This function lets you make the shift register outputs
// HIGH or LOW in exactly the same way that you use digitalWrite().

  bitWrite(data,desiredPin,desiredState); //Change desired bit to 0 or 1 in "data"

  // Now we'll actually send that data to the shift register.
  // The shiftOut() function does all the hard work of
  // manipulating the data and clock pins to move the data
  // into the shift register:

  shiftOut(Outdatapin, Outclockpin, MSBFIRST, data); //Send "data" to the shift register

  //Toggle the latchPin to make "data" appear at the outputs
  digitalWrite(Outlatchpin, HIGH); 
  digitalWrite(Outlatchpin, LOW); 
}




void oneAfterAnother()
{
// This function will turn on all the LEDs, one-by-one,
// and then turn them off all off, one-by-one. 

  int index;
  int delayTime = 100; // Time (milliseconds) to pause between LEDs
                       // Make this smaller for faster switching

  // Turn all the LEDs on
  for(index = 0; index <= 7; index++)
  {
    shiftWrite(index, HIGH);
    delay(delayTime);                
  }

  // Turn all the LEDs off
  for(index = 7; index >= 0; index--)
  {
    shiftWrite(index, LOW);
    delay(delayTime);
  }
}