Lab 2
/* Components Used: leds, Arduino board, piece of bridal vail for diffuser */
/* Diffuser is made with bridal vail, in rose shape so that it covers the leds with many layers */
/*The user can command the color red, yellow or blue at first by 'R', 'Y', 'B', and adjust the color by increasing or decreasing rgb value. */
/* to increase red: 'r ' ; green: 'g' ; blue: 'b' */
/* to decrease red: 'x' ; green:'y' ; blue: 'z' */
#include <stdio.h>
#include <string.h>
char serInString[100];
char colorCode;
int colorVal;
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 redValue = 10; //initial brightness of all leds = 10
int greenValue = 10;
int blueValue = 10;
void setup() {
pinMode(redPin, OUTPUT); // sets the pins as output
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
Serial.begin(9600);
analogWrite(redPin, redValue); // set them all to mid brightness
analogWrite(greenPin, greenValue); // set them all to mid brightness
analogWrite(bluePin, blueValue); // set them all to mid brightness
Serial.println("enter color command (e.g. rrrrrrrrbbbb)");
}
void loop () {
//read the serial port and create a string out of what you read
readSerialString(serInString, 100);
processRepeatKeyCommands(serInString, 100);
//Erase anything left in the serial string, preparing it for the
//next loop
resetSerialString(serInString, 100);
delay(100); // wait a bit, for serial data
}
void resetSerialString (char *strArray, int length) {
for (int i = 0; i < length; i++) {
strArray[i] = '\0';
}
}
void readSerialString (char *strArray, int maxLength) {
int i = 0;
if(!Serial.available()) {
return;
}
while (Serial.available() && i < maxLength) {
strArray[i] = Serial.read();
i++;
}
}
//go through the string, and increase the red value for each 'r',
//the green value for each 'g', and the blue value for each 'b'.
//For example "rrrg" increases red by 30 and green by 10.
void processRepeatKeyCommands(char *strArray, int maxLength) {
int i = 0;
//loop through the string (strArray)
//i = the current position in the string
//Stop when either (a) i reaches the end of the string or
// (b) there is an empty character '\0' in the string
while (i < maxLength && strArray[i] != '\0') {
//Read in the character at position i in the string
colorCode = serInString[i];
//If the character is yellow
if (colorCode == 'R'){
analogWrite(redPin, 255);
analogWrite(bluePin, 0);
analogWrite(greenPin, 0);
Serial.println(redValue);
Serial.println(blueValue);
Serial.println(greenValue);
}
else if (colorCode == 'Y'){
analogWrite(bluePin, 0);
analogWrite(redPin, 255);
analogWrite(greenPin, 255);
Serial.println(redValue);
Serial.println(blueValue);
Serial.println(greenValue);
}
else if (colorCode =='B'){
analogWrite (bluePin, 255);
analogWrite (redPin, 0);
analogWrite (greenPin, 0);
Serial.print("setting color to ");
Serial.println(redValue);
Serial.println(blueValue);
Serial.println(greenValue);
}
//user can adjust the color by incresing/decreasing RGB values
//increase red
if (colorCode == 'r') {
//Increase the current red value by 10, and if you reach 255 go back to 0
redValue = (redValue + 10) % 255;
analogWrite(redPin, redValue);
Serial.print("setting color r to ");
Serial.println(redValue);
}
//decrease red
else if (colorCode == 'x') {
redValue = (redValue - 10) % 255;
analogWrite(redPin, redValue);
Serial.print("setting color r to ");
Serial.println(redValue);
}
//increase green
else if (colorCode == 'g') {
greenValue = (greenValue + 10) % 255;
analogWrite(greenPin, greenValue);
Serial.print("setting color g to ");
Serial.println(greenValue);
}
//decrease green
else if (colorCode == 'y') {
greenValue = (greenValue - 10) % 255;
analogWrite(greenPin, greenValue);
Serial.print("setting color g to ");
Serial.println(redValue);
}
//increase blue
else if (colorCode == 'b') {
blueValue = (blueValue + 10) % 255;
analogWrite(bluePin, blueValue);
Serial.print("setting color b to ");
Serial.println(blueValue);
}
//decrease blue
else if (colorCode == 'z') {
blueValue = (blueValue - 10) % 255;
analogWrite(bluePin, blueValue);
Serial.print("setting color b to ");
Serial.println(blueValue);
}
i++;
}
}
