// Wire Master Reader
// by Nicholas Zambetti <http://www.zambetti.com>

// Demonstrates use of the Wire library
// Reads data from an I2C/TWI slave device
// Refer to the "Wire Slave Sender" example for use with this

// Created 29 March 2006

// This example code is in the public domain.

//ATtiny3216
#include <Wire.h>//ライブラリで内部プルアップ有効になる//library sets internal pullup enable

void setup() {
  Wire.begin();        // join i2c bus (address optional for master)
  
  //pinMode(SCL,INPUT_PULLUP);//内部プルアップ有効：公式ライブラリなら有効になるので、しなくていい
  //pinMode(SDA,INPUT_PULLUP);//enable internal pullup：<Wier.h> already sets it enable

  //pinMode(SCL,INPUT);内部プルアップ無効：外部プルアップ抵抗を使用した時
  //pinMode(SDA,INPUT);disable internal pullup：need this when external pullup resistor is used
  
  Serial.begin(9600);  // start serial for output
}

void loop() {
  Wire.requestFrom(8, 6);    // request 6 bytes from slave device #8

  while (Wire.available()) { // slave may send less than requested
    char c = Wire.read(); // receive a byte as character
    Serial.print(c);         // print the character
  }

  delay(500);
}