/*
* Code for cross-fading 3 LEDs, red, green and blue, or one tri-color LED, using PWM
* The program cross-fades slowly from red to green, green to blue, and blue to red
* The debugging code assumes Arduino 0004, as it uses the new Serial.begin()-style functions
* Clay Shirky
*/

char b_input[100];
int b_value = 0;

// Output
int redPin = 11; // Red LED, connected to digital pin 11
int greenPin = 9; // Green LED, connected to digital pin 9
int bluePin = 10; // Blue LED, connected to digital pin 10

// Program variables
int redVal = 255; // Variables to store the values to send to the pins
int greenVal = 255; // Initial values are Red full, Green and Blue off
int blueVal = 120;

int i = 0; // Loop counter
int wait = 50; // 50ms (.05 second) delay; shorten for faster fades
int DEBUG = 1; // DEBUG counter; if set to 1, will write values back via serial

void setup()
{
pinMode(redPin, OUTPUT); // sets the pins as output
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT); // If we want to see the pin values for debugging...
Serial.begin(9600); // ...set up the serial ouput on 0004 style
Serial.println("just continue to send me b");

}

// Main program
void loop()
{
i += 20; // Increment counter
if (i < 255) // First phase of fades { greenVal += 1; // Green up redVal = 1; // Red low blueVal += 1; // Blue up } else if (i < 509) // Second phase of fades { greenVal -= 5; // Green down redVal += 5; // red up blueVal -= 5; // Blue up } else if (i < 763) // Third phase of fades { greenVal = 10; // Green low redVal -= 10; // Red down blueVal += 10; // Blue up } else // Re-set the counter, and start the fades again { i = 1; } memset(b_input, 0, 100); readSerialString(b_input); if(b_input[0] == 'b'){ b_value = b_value + 1; Serial.println(b_value); } if (b_value == 13) { b_value = 0; } analogWrite(redPin, redVal); // Write current values to LED pins analogWrite(greenPin, greenVal); analogWrite(bluePin, blueVal + b_value*20); // if (DEBUG) { // If we want to read the output // DEBUG += 1; // Increment the DEBUG counter // if (DEBUG > 10) // Print every 10 loops
// {
// DEBUG = 1; // Reset the counter
//
// Serial.print(i); // Serial commands in 0004 style
// Serial.print("\t"); // Print a tab
// Serial.print("R:"); // Indicate that output is red value
// Serial.print(redVal); // Print red value
// Serial.print("\t"); // Print a tab
// Serial.print("G:"); // Repeat for green and blue...
// Serial.print(greenVal);
// Serial.print("\t");
// Serial.print("B:");
// Serial.println(blueVal); // println, to end with a carriage return
// }
// }
delay(wait); // Pause for 'wait' milliseconds before resuming the loop
}

void readSerialString (char *strArray) {
int i = 0;
if(!Serial.available()) {
return;
}
while (Serial.available()) {
strArray[i] = Serial.read();
//Serial.print(strArray);
i++;
}
}