Michael Shimniok / Mbed 2 deprecated DataBus

Code for autonomous rover for Sparkfun AVC. DataBus won 3rd in 2012 and the same code was used on Troubled Child, a 1986 Jeep Grand Wagoneer to win 1st in 2014.

Dependencies:   mbed Watchdog SDFileSystem DigoleSerialDisp

UI/Beep/Beep.cpp

Committer:
shimniok
Date:
2018-11-30
Revision:
25:bb5356402687
Parent:
23:a34af501ea89

File content as of revision 25:bb5356402687:

#include "mbed.h"
#include "Beep.h"

/** Create a Beep object connected to the specified PwmOut pin
 *
 * @param pin PwmOut pin to connect to 
 */
Beep::Beep(PinName pin) : _pwm(pin) {
    _pwm.write(0.0);     // after creating it have to be off
}

 /** Stop the beep instantaneously.
  */
void Beep::nobeep() {
    _pwm.write(0.0);
}

/** Beep with given frequency and duration.
 *
 * @param frequency - the frequency of the tone in Hz
 * @param time - the duration of the tone in seconds
 */
     
void Beep::beep(float freq, float time) {

    _pwm.period(1.0/freq);
    _pwm.write(0.5);            // 50% duty cycle - beep on
    toff.attach(callback(this, &Beep::nobeep), time);   // time to off
}