Ik hope somebody can help with my problem.
First i shall tell what i want to do:
I want to control a rgb ledstip.
When i turn on the arduino the ledstrip must be in the white color.
Exept when there is a button pressed, then the ledstrip must fade in with brightness.
I use de following code:
/*
Control a RGB led with Hue, Saturation and Brightness (HSB / HSV )
Hue is change by an analog input.
Brightness is changed by a fading function.
Saturation stays constant at 255
getRGB() function based on <http://www.codeproject.com/miscctrl/CPicker.asp>
dim_curve idea by Jims <http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1174674545>
created 05-01-2010 by kasperkamperman.com
*/
/*
dim_curve 'lookup table' to compensate for the nonlinearity of human vision.
Used in the getRGB function on saturation and brightness to make 'dimming' look more natural.
Exponential function used to create values below :
x from 0 - 255 : y = round(pow( 2.0, x+64/40.0) - 1)
*/
const byte dim_curve[] = {
0, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6,
6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11,
11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15,
15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 20,
20, 20, 21, 21, 22, 22, 22, 23, 23, 24, 24, 25, 25, 25, 26, 26,
27, 27, 28, 28, 29, 29, 30, 30, 31, 32, 32, 33, 33, 34, 35, 35,
36, 36, 37, 38, 38, 39, 40, 40, 41, 42, 43, 43, 44, 45, 46, 47,
48, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62,
63, 64, 65, 66, 68, 69, 70, 71, 73, 74, 75, 76, 78, 79, 81, 82,
83, 85, 86, 88, 90, 91, 93, 94, 96, 98, 99, 101, 103, 105, 107, 109,
110, 112, 114, 116, 118, 121, 123, 125, 127, 129, 132, 134, 136, 139, 141, 144,
146, 149, 151, 154, 157, 159, 162, 165, 168, 171, 174, 177, 180, 183, 186, 190,
193, 196, 200, 203, 207, 211, 214, 218, 222, 226, 230, 234, 238, 242, 248, 255,
};
const int sensorPin = 0; // pin the potmeter is attached too
const int buttonPin = 2; // pin the Pushbutton is attached too
const int ledPinR = 9; // pwm pin with red led
const int ledPinG = 10; // pwm pin with green led
const int ledPinB = 11; // pwm pin with blue led
int sensorVal = 0; // store the value coming from the sensor
int fadeVal = 0; // value that changes between 0-255
int fadeSpeed = 5; // 'speed' of fading
int buttonState = 0; // variable for reading the pushbutton status
// getRGB function stores RGB values in this array
// use these values for the red, blue, green led.
int rgb_colors[3];
int hue;
int saturation;
int brightness;
void setup() {
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(buttonPin, INPUT);
Serial.begin(57600);
}
void loop() {
delay(1000);
buttonState = digitalRead(buttonPin);
sensorVal = analogRead(sensorPin);
switch (buttonState) {
case 0:
analogWrite(ledPinR, 100); // red value
analogWrite(ledPinG, 100); // green value
analogWrite(ledPinB, 100); // blue value
break;
case 1:
// fade from 0 - 255 and back with a certain speed
fadeVal = fadeVal + fadeSpeed; // change fadeVal by speed
fadeVal = constrain(fadeVal, 0, 255); // keep fadeVal between 0 and 255
if(fadeVal==255 || fadeVal==0) // change from up>down or down-up (negative/positive)
{ fadeSpeed = -fadeSpeed;
}
// set HSB values
hue = map(sensorVal,0, 1023,0, 359); // hue is a number between 0 and 360
saturation = 255; // saturation is a number between 0 - 255
brightness = fadeVal; // value is a number between 0 - 255
getRGB(hue,saturation,brightness,rgb_colors); // converts HSB to RGB
analogWrite(ledPinR, rgb_colors[0]); // red value in index 0 of rgb_colors array
analogWrite(ledPinG, rgb_colors[1]); // green value in index 1 of rgb_colors array
analogWrite(ledPinB, rgb_colors[2]); // blue value in index 2 of rgb_colors array
delay(10); // delay to slow down fading
break;
}
// while(1){}
}
void getRGB(int hue, int sat, int val, int colors[3]) {
/* convert hue, saturation and brightness ( HSB/HSV ) to RGB
The dim_curve is used only on brightness/value and on saturation (inverted).
This looks the most natural.
*/
val = dim_curve[val];
sat = 255-dim_curve[255-sat];
int r;
int g;
int b;
int base;
if (sat == 0) { // Acromatic color (gray). Hue doesn't mind.
colors[0]=val;
colors[1]=val;
colors[2]=val;
} else {
base = ((255 - sat) * val)>>8;
switch(hue/60) {
case 0:
r = val;
g = (((val-base)*hue)/60)+base;
b = base;
break;
case 1:
r = (((val-base)*(60-(hue%60)))/60)+base;
g = val;
b = base;
break;
case 2:
r = base;
g = val;
b = (((val-base)*(hue%60))/60)+base;
break;
case 3:
r = base;
g = (((val-base)*(60-(hue%60)))/60)+base;
b = val;
break;
case 4:
r = (((val-base)*(hue%60))/60)+base;
g = base;
b = val;
break;
case 5:
r = val;
g = base;
b = (((val-base)*(60-(hue%60)))/60)+base;
break;
}
colors[0]=r;
colors[1]=g;
colors[2]=b;
}
}
This is already working for the most.
But when the arduino turns on, and the pushbutton is pressed the ledstrip begins to fade in, but when the button is no longer pressed the ledstrip become's white.
I want the ledstrip is stil fading in til the end, and stays on that color.
I think it is in the loop.
Can somebody give me a hint how to fix this?