105
edits
Changes
no edit summary
[[Image: CS_final_3.jpg |400px]]
Code:
/**
*This code belongs in Arduino.
*An RGB LED lights up according to a value selected.
**/
#define START_COLOR_CHAR '^'
#define END_COLOR_CHAR '$'
#define COLOR_SIZE 8
#define PIN_RED 9 //connect red cathode (leg) to pin 9
#define PIN_GREEN 11 //connect green cathode (leg) to pin 11
#define PIN_BLUE 10 //connect blue cathod (leg) to pin 10
char serialMessage[COLOR_SIZE];
unsigned int readChar;
unsigned int count;
unsigned long color;
unsigned int r;
unsigned int g;
unsigned int b;
boolean readingSerial;
void setup()
{
Serial.begin(9600);
readingSerial = false;
}
void loop()
{
if (Serial.available() > 0 && !readingSerial)
{
if (Serial.read() == START_COLOR_CHAR)
{
serialReadColor();
}
}
}
void serialReadColor()
{
readingSerial = true;
count = 0;
iniReading:
if (Serial.available() > 0)
{
readChar = Serial.read();
if (readChar == END_COLOR_CHAR || count == COLOR_SIZE)
{
goto endReading;
}
else
{
serialMessage[count++] = readChar;
goto iniReading;
}
}
goto iniReading;
endReading:
readingSerial = false;
serialMessage[count] = '\0';
setColor(serialMessage);
}
void setColor(char* value)
{
// Convert Char* to Long
color = atol(value);
// Extract RGB
r = color >> 16 & 0xFF;
g = color >> 8 & 0xFF;
b = color >> 0 & 0xFF;
// Send values to analog pins
analogWrite(PIN_RED, r);
analogWrite(PIN_GREEN, g);
analogWrite(PIN_BLUE, b);
}
