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//**************************************************************//
//  Name    : shiftOutCode, Hello World                         //
//  Author  : Carlyn Maw,Tom Igoe                               //
//  Date    : 25 Oct, 2006                                      //
//  Version : 1.0                                               //
//  Notes   : Code for using a 74HC595 Shift Register           //
//          : to count from 0 to 255                            //
//****************************************************************
 
//Pin connected to ST_CP of 74HC595
int latchPin = 8;
//Pin connected to SH_CP of 74HC595
int clockPin = 12;
////Pin connected to DS of 74HC595
int dataPin = 11;
 
void setup() {
  //set pins to output because they are addressed in the main loop
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
}
 
void loop() {
  //count up routine
  for (int j = 0; j < 256; j++) {
    //ground latchPin and hold low for as long as you are transmitting
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, LSBFIRST, j);   
    //return the latch pin high to signal chip that it 
    //no longer needs to listen for information
    digitalWrite(latchPin, HIGH);
    delay(1000);
  }
}

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// MSBFIRSTのシリアル用
int data = 500;
// 上位バイトを出力する
shiftOut(dataPin, clock, MSBFIRST, (data >> 8));
// 下位バイトを出力する
shiftOut(data, clock, MSBFIRST, data);
 
// LSBFIRSTのシリアル用
data = 500;
// 下位バイトを出力する
shiftOut(dataPin, clock, LSBFIRST, data);  
// 上位バイトを出力する 
shiftOut(dataPin, clock, LSBFIRST, (data >> 8));