USB ping Example

// test USB processing Pinguino
// Jean-Pierre MANDON 2009
 
int i;
uchar caractere,caractere1;
 
void setup()
{
for (i=0;i<8;i++)
        {
        pinMode(i,OUTPUT);
        digitalWrite(i,LOW);
        }
}
 
void loop()
{
if (USB.available())
        {
        caractere=USB.read();
        if (caractere=='W') if (USB.available())
                {
                caractere1=USB.read();
                if (caractere1=='C')
                        for (i=0;i<8;i++) digitalWrite(i,LOW);
                else
                        digitalWrite(caractere1,digitalRead(caractere1)^1);
                }
        }
}