Hi All!!
Noob here. Not a pro programmer or anything, but I have a problem that I simply CAN NOT fix!
Refer to the code below, but in a nutshell I have an RGB (common anode) LED and a pushbutton linked to pin-12.
Each time the button is pressed, the program cycles through various static modes (one color per mode). Everything works fine.
BUT, the LAST mode is a "fade" mode (Mode 6) that fades slowly through all 256 colors, and repeats the fade cycle 500 times. However, sometimes I want to press a button to break the loop and return to mode-0 (where the LED values represent an OFF mode).
I know I need some kind of listener in the WHILE loop to check for a button press, and I need some set of loops to check the state of the button in order to break out of the loop, etc.... but please believe me when I tell you that I have been working on these <10 lines of code for more than 6 hours and I CAN NOT get this to work. I have tried all sorts of loops, variables, counters, etc., etc., etc., at all parts within and around this WHILE loop. I have removed all the excess from the code below so that you can clearly see what the program is doing.
Can somebody please help me out and provide me with the code that will listen for a button press within the WHILE loop and exit me back to Mode-0?????
I would appreciate it SO much!!
-Dave
//
// Common-anode LED color chooser
//
// Provides button-actuated color modes, and a final mode that
// cycles an RGB common-anode LED through 256 color combinations
//
// Revised by David DeProspero - 2010-2011
//
int redPin = 5; // PWM pin for RED pin
int greenPin = 6; // PWM pin for GREEN pin
int bluePin = 3; // PWM pin for BLUE pin
int button = 12; // Button connected to pin 12 (using sensor shield connected)
int val=0; // variable for reading the button status
int state=0; // variable to hold the last button state
int presses = 0; // how many times the button was pressed
int mode = 0; // what mode the color picker is in
// Fades UP an active-low or common-anode output.
//
void fadeUp(int pin, int d = 10)
{
int i;
for (i = 255; i >= 0; i--)
{
analogWrite(pin, i);
delay(d);
}
}
// Fades DOWN an active-low or common-anode output.
//
void fadeDown(int pin, int d = 10)
{
int i;
for (i = 0; i <= 255; i++)
{
analogWrite(pin, i);
delay(d);
}
}
// Set up outputs, read button inputs, select operational mode (in scaner mode, give full high values so the
// LEDs start off. Then fade in the green LED.
//
void setup()
{
state = digitalRead(button); //reads buttons start position
}
void loop(){
val = digitalRead(button); //sets val to the state of the button press
delay(10); //debounce multiple button presses
if (val != state){ //compares button press to current state
if (val == LOW){
if (mode == 0){ //if mode is zero and button was pressed, set mode to 1
mode = 1;
}
else {
if (mode == 1) { //increment mode to 2
mode = 2;
}
else {
if (mode == 2){
mode = 3;
}
else {
if (mode == 3){
mode = 4;
}
else {
if (mode == 4){
mode = 5;
}
else {
if (mode == 5){
mode = 6;
}
}
}
}
}
}
}
state = val;
}
if (mode == 0){ //ALL OFF //mode 0 turns all LEDs off
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
analogWrite(redPin, 255);
analogWrite(greenPin,255);
analogWrite(bluePin, 255);
}
if (mode == 1){ // RED
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
analogWrite(redPin, 255);
analogWrite(greenPin, 0);
analogWrite(bluePin, 255);
//count++;
}
if (mode == 2){ // GREEN
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
analogWrite(redPin, 255);
analogWrite(greenPin, 255);
analogWrite(bluePin, 0);
//count++;
}
if (mode == 3){ // BLUE
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
analogWrite(redPin, 0);
analogWrite(greenPin, 255);
analogWrite(bluePin, 255);
//count++;
}
if (mode == 4){ // WHITE
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
analogWrite(redPin, 0);
analogWrite(greenPin, 0);
analogWrite(bluePin, 0);
//count++;
}
if (mode == 5){ // VIOLET
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
analogWrite(redPin, 0);
analogWrite(greenPin, 125);
analogWrite(bluePin, 255);
//count++;
}
if (mode == 6){ // FADE
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
analogWrite(redPin, 255);
analogWrite(greenPin, 255);
analogWrite(bluePin, 255);
fadeUp(bluePin);
byte number = 0;
while (number < 500){
// counter loop to cycle through RGB LEDs 500 times.
// The cycle of ramps will go through all of the primary
// and secondary hues in the RGB rainbow, and repeat.
//
//
//PROBLEM: I need to be able to press the button on pin-12 at any point IN this loop
// (if I don't want to do the full 500 cycles), and return back to MODE-0 (all OFF)
//
fadeUp(greenPin);
fadeDown(bluePin);
fadeUp(redPin);
fadeDown(greenPin);
fadeUp(bluePin);
fadeDown(redPin);
number++;
}
// count++;
}
}
