Three statement switch very slow

Hello all,

I have a question, I’m trying to make a sort of ‘menu’ switch for my RGB LED’s from Adafruit.
The LED’s have a LPD6803 chip, so i cam control them individually.

My problem is this, I can only switch when the running program is ended. I would like to switch during the program.
Who can help me out?

Here is the code:

#include <TimerOne.h>
#include "LPD6803.h"

// Constants that won't change:
const int dataPin = 2;           // 'yellow' wire Data
const int clockPin = 3;          // 'green' wire Clock
const int buttonPin = 7;         // pushbutton for Mode change

// Constants that will change:
int buttonState      = 0; 
int lastButtonState  = 0;
int stateNum         = 0;
int delayValue       = 50;

// Set the first variable to the NUMBER of pixels. 20 = 20 pixels in a row
LPD6803 strip = LPD6803(25, dataPin, clockPin);

void setup() {
  // The Arduino needs to clock out the data to the pixels
  // this happens in interrupt timer 1, we can change how often
  // to call the interrupt. setting CPUmax to 100 will take nearly all all the
  // time to do the pixel updates and a nicer/faster display, 
  // especially with strands of over 100 dots.
  // (Note that the max is 'pessimistic', its probably 10% or 20% less in reality)
  strip.setCPUmax(70);  // start with 50% CPU usage. up this if the strand flickers or is slow
  // Start up the LED counter

  // Update the strip, to start they are all 'off';
  // initialize the button pin as a input:
  pinMode(buttonPin, INPUT);
  // initialize serial communication:
  Serial.println("LPD-6803 sequencing");

void loop() {
      // read the pushbutton input pin:
  buttonState = digitalRead(buttonPin);

      // compare the buttonState to its previous state
  if (buttonState != lastButtonState) {
      // if the state has changed, increment the counter
  if (buttonState == HIGH) {
      // if the current state is HIGH then the button
      // wend from off to on:
     // Serial.println("on");
      Serial.print("Program:  ");
      Serial.println(stateNum, DEC);
  // save the current state as the last state, 
  //for next time through the loop
  lastButtonState = buttonState;
   // change the state of the led when someone pressed the button.
     if(stateNum>2) stateNum=0; {  
     if (stateNum == 0) {
  colorWipe(Color(63, 0, 0), delayValue);
  colorWipe(Color(63, 53, 0), delayValue);
  colorWipe(Color(63, 63, 0), delayValue);
  colorWipe(Color(0, 63, 0), delayValue);
  colorWipe(Color(0, 63, 53), delayValue);
  colorWipe(Color(0, 63, 63), delayValue);
  colorWipe(Color(0, 0, 63), delayValue);
  colorWipe(Color(63, 0, 63), delayValue);
     if (stateNum == 1) {
     if (stateNum == 2) {

void rainbow(uint8_t wait) {
  int i, j;
  for (j=0; j < 96 * 1; j++) {     // 1 cycle of all 96 colors in the wheel
    for (i=0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel( (i + j) % 96));
    };   // write all the pixels out

// Slightly different, this one makes the rainbow wheel equally distributed 
// along the chain
void rainbowCycle(uint8_t wait) {
  int i, j;
  for (j=0; j < 96 * 1; j++) {     //1 cycle of all 96 colors in the wheel
    for (i=0; i < strip.numPixels(); i++) {
      // tricky math! we use each pixel as a fraction of the full 96-color wheel
      // (thats the i / strip.numPixels() part)
      // Then add in j which makes the colors go around per pixel
      // the % 96 is to make the wheel cycle around
      strip.setPixelColor(i, Wheel( ((i * 96 / strip.numPixels()) + j) % 96) );
    };   // write all the pixels out

// fill the dots one after the other with said color
// good for testing purposes
void colorWipe(uint16_t c, uint8_t wait) {
  int i;
  for (i=0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, c);;

/* Helper functions */

// Create a 15 bit color value from R,G,B
unsigned int Color(byte r, byte g, byte b)
  //Take the lowest 5 bits of each value and append them end to end
  return( ((unsigned int)g & 0x1F )<<10 | ((unsigned int)b & 0x1F)<<5 | (unsigned int)r & 0x1F);

//Input a value 0 to 127 to get a color value.
//The colours are a transition r - g -b - back to r
unsigned int Wheel(byte WheelPos)
  byte r,g,b;
  switch(WheelPos >> 5)
    case 0:
      r=31- WheelPos % 32;   //Red down
      g=WheelPos % 32;      // Green up
      b=0;                  //blue off
    case 1:
      g=31- WheelPos % 32;  //green down
      b=WheelPos % 32;      //blue up
      r=0;                  //red off
    case 2:
      b=31- WheelPos % 32;  //blue down 
      r=WheelPos % 32;      //red up
      g=0;                  //green off

Thanx a lot!

My problem is this, I can only switch when the running program is ended. I would like to switch during the program. Who can help me out?

It's the same answer that everybody gets who wants to do two things at once. You can't.

However, the Arduino can be pretty darned fast, so two things in succession can appear to be simultaneous, which is often good enough.

The key to making things happen closer together is to get rid of every single call to delay().

Look at the blink without delay example, for a start.

Basically, what you need to create is a state machine, with states and transitions.

On each pass through loop, you see if a transition needs to be made, because it is time, or because a switch was pressed.

If a transition is needed, make the transition, record the time, and record the new state. Repeat on every pass through loop().