Assignment: Digital I/O with Arduino Boards + Diffuser
Collaborators:
/*
* Serial RGB LED
* ---------------
* Serial commands control the brightness of R,G,B LEDs
*
* Command structure is "<colorCode><colorVal>", where "colorCode" is
* one of "r","g",or "b" and "colorVal" is a number 0 to 255.
* E.g. "r0" turns the red LED off.
* "g127" turns the green LED to half brightness
* "b64" turns the blue LED to 1/4 brightness
*
* Created 18 October 2006
* copyleft 2006 Tod E. Kurt <tod@todbot.com
*/
char serInString[100]; // array that will hold the different bytes of the string. 100=100characters;
// -> you must state how long the array will be else it won't work properly
char colorCode;
char colorDIR;
int RcolorVal = 1;
int GcolorVal = 1;
int BcolorVal = 1;
int colorVal = 1;
int dec = 0;
int redPin = 9; // Red LED, connected to digital pin 9
int greenPin = 10; // Green LED, connected to digital pin 10
int bluePin = 11; // Blue LED, connected to digital pin 11
int myPin;
void setup() {
pinMode(redPin, OUTPUT); // sets the pins as output
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
Serial.begin(9600);
analogWrite(redPin, RcolorVal); // set them all to mid brightness
analogWrite(greenPin, GcolorVal); // set them all to mid brightness
analogWrite(bluePin, BcolorVal); // set them all to mid brightness
Serial.println("enter color command (e.g. 'r+' or 'g+' or 'b+' or 'b-' etc....) :");
}
void loop () {
//read the serial port and create a string out of what you read
readSerialString(serInString);
colorCode = serInString[0];
if( colorCode == 'r' || colorCode == 'g' || colorCode == 'b' ) {
//colorVal = atoi(serInString+1); //converst ASCII code to INTERGER VALUES
colorDIR = serInString[1];
if(colorDIR == '+'){
dec = + 10;
}
if(colorDIR == '-'){
dec = -10;
}
if(colorCode == 'r'){
myPin = redPin;
RcolorVal = RcolorVal + dec;
colorVal = RcolorVal;
}
if(colorCode == 'g'){
myPin = greenPin;
GcolorVal = GcolorVal + dec;
colorVal = GcolorVal;
}
if(colorCode == 'b'){
myPin = bluePin;
BcolorVal = BcolorVal + dec;
colorVal = BcolorVal;
}
if(colorVal < 1){
colorVal = 1;
}
if(colorVal > 255){
colorVal = 1;
}
Serial.print("setting color ");
Serial.print(colorCode);
Serial.print(" to ");
Serial.print(colorVal);
Serial.println();
serInString[0] = 0; // indicates we've used this string
analogWrite(myPin, colorVal);
}
delay(100); // wait a bit, for serial data
}
//read a string from the serial and store it in an array
//you must supply the array variable
void readSerialString (char *strArray) {
int i = 0;
if(!Serial.available()) {
return;
}
while (Serial.available()) {
strArray[i] = Serial.read();
i++;
}
}
