Reference for Wiring version 0027+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name

tone()

Examples
void setup() {
  // generates a 400Hz tone in output pin 0 with 200ms of duration
  tone(0, 400, 200); 
}

void loop() {

}

void setup() {
  // generates a 400Hz tone in output pin 0 with infinite duration
  tone(0, 400, -1); 
}

void loop() {

}
Description The tone() generates a tone of a determined frequency in hertz on a specific pin with a specified duration. The tone command uses timer2 to generate the tone accurately. Use a negative number in duration for infinite duration.
Syntax
tone(pin, frequency, duration)
Parameters
pin int the output pin number in which the tone will be generated.
frequency int: the frequency for the pulse in Hertz
duration int: the tone duration in milliseconds or a negative number for infinite duration
Returns None
Usage Application
Related noTone()
Updated on September 16, 2010 10:41:31pm PDT

Creative Commons License