The sketch in it's entirety.
//**************************************************************//
// Name : shiftOutCode, Predefined Dual Array Style //
// 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 = 9;
//Pin connected to SH_CP of 74HC595
int clockPin = 10;
////Pin connected to DS of 74HC595
int dataPin = 8;
//holders for infromation you're going to pass to shifting function
byte dataRED;
byte dataGREEN;
byte dataArrayRED[10];
byte dataArrayGREEN[10];
void setup() {
//set pins to output because they are addressed in the main loop
pinMode(latchPin, OUTPUT);
Serial.begin(9600);
//modified section, attempting to define array in one line, results in only one shift register displaying
int dataArrayRED[] = {0xFF,0xFE,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x00,0xE0};
//if array is defined as below, over multiple lines, the sketch works over two shift registers
dataArrayGREEN[0] = 0xFF; //11111111
dataArrayGREEN[1] = 0x7F; //01111111
dataArrayGREEN[2] = 0x3F; //00111111
dataArrayGREEN[3] = 0x1F; //00011111
dataArrayGREEN[4] = 0x0F; //00001111
dataArrayGREEN[5] = 0x07; //00000111
dataArrayGREEN[6] = 0x03; //00000011
dataArrayGREEN[7] = 0x01; //00000001
dataArrayGREEN[8] = 0x00; //00000000
dataArrayGREEN[9] = 0x07; //00000111
//function that blinks all the LEDs
//gets passed the number of blinks and the pause time
blinkAll_2Bytes(2,500);
}
void loop() {
for (int j = 0; j < 10; j++) {
//load the light sequence you want from array
dataRED = dataArrayRED[j];
dataGREEN = dataArrayGREEN[j];
//ground latchPin and hold low for as long as you are transmitting
digitalWrite(latchPin, 0);
//move 'em out
shiftOut(dataPin, clockPin, dataGREEN);
//*************************This is outputting only zeros with the modified array statement *******
shiftOut(dataPin, clockPin, dataRED);
//**********************************************************************************************
//*************************Serial monitor displays valid values for green, zeros for red*************
Serial.print(dataGREEN);Serial.println(dataRED);
//**********************************************************************************************
//return the latch pin high to signal chip that it
//no longer needs to listen for information
digitalWrite(latchPin, 1);
delay(300);
}
}
// the heart of the program
void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
// This shifts 8 bits out MSB first,
//on the rising edge of the clock,
//clock idles low
//internal function setup
int i=0;
int pinState;
pinMode(myClockPin, OUTPUT);
pinMode(myDataPin, OUTPUT);
//clear everything out just in case to
//prepare shift register for bit shifting
digitalWrite(myDataPin, 0);
digitalWrite(myClockPin, 0);
//for each bit in the byte myDataOut?
//NOTICE THAT WE ARE COUNTING DOWN in our for loop
//This means that %00000001 or "1" will go through such
//that it will be pin Q0 that lights.
for (i=7; i>=0; i--) {
digitalWrite(myClockPin, 0);
//if the value passed to myDataOut and a bitmask result
// true then... so if we are at i=6 and our value is
// %11010100 it would the code compares it to %01000000
// and proceeds to set pinState to 1.
if ( myDataOut & (1<<i) ) {
pinState= 1;
}
else {
pinState= 0;
}
//Sets the pin to HIGH or LOW depending on pinState
digitalWrite(myDataPin, pinState);
//register shifts bits on upstroke of clock pin
digitalWrite(myClockPin, 1);
//zero the data pin after shift to prevent bleed through
digitalWrite(myDataPin, 0);
}
//stop shifting
digitalWrite(myClockPin, 0);
}
//blinks the whole register based on the number of times you want to
//blink "n" and the pause between them "d"
//starts with a moment of darkness to make sure the first blink
//has its full visual effect.
void blinkAll_2Bytes(int n, int d) {
digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, 0);
shiftOut(dataPin, clockPin, 0);
digitalWrite(latchPin, 1);
delay(200);
for (int x = 0; x < n; x++) {
digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, 255);
shiftOut(dataPin, clockPin, 255);
digitalWrite(latchPin, 1);
delay(d);
digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, 0);
shiftOut(dataPin, clockPin, 0);
digitalWrite(latchPin, 1);
delay(d);
}
}
Again, the code works if I leave the individual array statements (green works, red doesn't).
