Loop code without manually pressing the button

Question

In a piece off code I am modifying I have a button connected to start the code and then it resets its self afterwards. Is they a way to make the arduino loop that code without manually pressing the button again?

This is a section off the code:

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h>
#endif
#define PIN 6
#define BUTTON_PIN 9
Adafruit_NeoPixel strip = Adafruit_NeoPixel(120, PIN, NEO_GRB + NEO_KHZ800);
bool oldState = HIGH;
int showType = 0;
void(* resetFunc) (void) = 0; //declare reset function @ address 0
void setup() {
 pinMode(BUTTON_PIN, INPUT_PULLUP);
 strip.begin();
 strip.show(); // Initialize all pixels to 'off'
}
void loop() {
 // Get current button state.
 bool newState = digitalRead(BUTTON_PIN);
 // Check if state changed from high to low (button press).
 if (newState == LOW && oldState == HIGH) {
 // Short delay to debounce button.
 delay(20);
 // Check if button is still low after debounce.
 newState = digitalRead(BUTTON_PIN);
 if (newState == LOW) {
 showType++;
 if (showType > 9)
 showType=0;
 startShow(showType);
 }
 }
 // Set the last button state to the old state.
 oldState = newState;
}
void startShow(int i) { 
 colorWipe(strip.Color(75, 0, 0), 50); // Red
 colorWipe(strip.Color(0, 75, 0), 50); // Green
 colorWipe(strip.Color(0, 0, 75), 50); // Blue
 theaterChase(strip.Color(75, 75, 75), 50); // White
 theaterChase(strip.Color(75, 0, 0), 50); // Red
 theaterChase(strip.Color(0, 0, 75), 50); // Blue
 rainbow(20);
 rainbowCycle(20);
 theaterChaseRainbow(50);
 resetFunc(); //call reset
}

Thanks Reece

• MaskedCoding: pastebin.com/BULf5CfQ
• Edgar Bonet: Remove the loop() function, and rename void startShow(int i) as void loop().
• Gerben: Move startShow(showType); to just above ` oldState = newState;`. That way it get called al the time, and the button still changes the showType.
• Mark Smith: Could you describe more clearly what you want to happen please? Do you want to wait for the button to be pressed then do the LED stuff forever?
• Delta_G: If you want the led stuff to loop forever, why are you resetting the board at the end of that function? Why not just let loop call it again?

Answer 1

As pointed out by Delta_G, there is no point in resetting your program. What you should do is think your program in terms of the Arduino logic:

1. You put in setup() the code you want to run when your program starts.
2. You put in loop() the code you want to run over and over again.

In this case loop() is fairly simple, as the stuff you want to run over and over again is the animation, thus:

void loop() {
 colorWipe(strip.Color(75, 0, 0), 50); // Red
 colorWipe(strip.Color(0, 75, 0), 50); // Green
 colorWipe(strip.Color(0, 0, 75), 50); // Blue
 theaterChase(strip.Color(75, 75, 75), 50); // White
 theaterChase(strip.Color(75, 0, 0), 50); // Red
 theaterChase(strip.Color(0, 0, 75), 50); // Blue
 rainbow(20);
 rainbowCycle(20);
 theaterChaseRainbow(50);
}

Note that I removed the call to resetFunc().

The stuff you want to do at startup is the initialization. Oh, wait. In a comment you wrote "I want to wait for the button press". So this also has to be done before the program starts looping. Hence your setup() should initialize stuff, then wait for the button press:

void setup() {
 // Initialize the strip to all piwels off.
 strip.begin();
 strip.show();
 // Wait until the button is pressed.
 pinMode(BUTTON_PIN, INPUT_PULLUP);
 while (digitalRead(BUTTON_PIN) == HIGH)
 ; // do nothing
}