Tanmay Bangalore / 4180_L4_IoTBot

The IoTBot is a WiFi-enabled rover built from the Shadow Robot kit. It is controlled from a web interface running on the Adafruit Huzzah ESP8266 WiFi module and implements a pair of Hall-effect sensors on the motors to keep the wheels spinning at the same speed. Additionally, it uses a Sharp IR sensor to detect walls in front of the robot and prevent it from crashing.

Dependencies:   mbed-dev mbed-rtos

Fork of huzzah_helloWorld by ECE 4180 Team Who

SongPlayer.h@2:2d87957b577b, 2016-11-02 (annotated)

Committer:
tanmaybangalore
Date:
Wed Nov 02 17:15:46 2016 +0000
Revision:
2:2d87957b577b
Commit for code checkoff

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tanmaybangalore 2:2d87957b577b 1 #include "mbed.h"
tanmaybangalore 2:2d87957b577b 2 // new class to play a note on Speaker based on PwmOut class
tanmaybangalore 2:2d87957b577b 3 class SongPlayer
tanmaybangalore 2:2d87957b577b 4 {
tanmaybangalore 2:2d87957b577b 5 public:
tanmaybangalore 2:2d87957b577b 6 SongPlayer(PinName pin) : _pin(pin) {
tanmaybangalore 2:2d87957b577b 7 // _pin(pin) means pass pin to the constructor
tanmaybangalore 2:2d87957b577b 8 }
tanmaybangalore 2:2d87957b577b 9 // class method to play a note based on PwmOut class
tanmaybangalore 2:2d87957b577b 10 void PlaySong(float frequency[], float duration[], float volume=1.0) {
tanmaybangalore 2:2d87957b577b 11 vol = volume;
tanmaybangalore 2:2d87957b577b 12 notecount = 0;
tanmaybangalore 2:2d87957b577b 13 _pin.period(1.0/frequency[notecount]);
tanmaybangalore 2:2d87957b577b 14 _pin = volume/2.0;
tanmaybangalore 2:2d87957b577b 15 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
tanmaybangalore 2:2d87957b577b 16 // setup timer to interrupt for next note to play
tanmaybangalore 2:2d87957b577b 17 frequencyptr = frequency;
tanmaybangalore 2:2d87957b577b 18 durationptr = duration;
tanmaybangalore 2:2d87957b577b 19 //returns after first note starts to play
tanmaybangalore 2:2d87957b577b 20 }
tanmaybangalore 2:2d87957b577b 21 void nextnote();
tanmaybangalore 2:2d87957b577b 22 private:
tanmaybangalore 2:2d87957b577b 23 Timeout noteduration;
tanmaybangalore 2:2d87957b577b 24 PwmOut _pin;
tanmaybangalore 2:2d87957b577b 25 int notecount;
tanmaybangalore 2:2d87957b577b 26 float vol;
tanmaybangalore 2:2d87957b577b 27 float * frequencyptr;
tanmaybangalore 2:2d87957b577b 28 float * durationptr;
tanmaybangalore 2:2d87957b577b 29 };
tanmaybangalore 2:2d87957b577b 30 //Interrupt Routine to play next note
tanmaybangalore 2:2d87957b577b 31 void SongPlayer::nextnote()
tanmaybangalore 2:2d87957b577b 32 {
tanmaybangalore 2:2d87957b577b 33 _pin = 0.0;
tanmaybangalore 2:2d87957b577b 34 notecount++; //setup next note in song
tanmaybangalore 2:2d87957b577b 35 if (durationptr[notecount]!=0.0) {
tanmaybangalore 2:2d87957b577b 36 _pin.period(1.0/frequencyptr[notecount]);
tanmaybangalore 2:2d87957b577b 37 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
tanmaybangalore 2:2d87957b577b 38 _pin = vol/2.0;
tanmaybangalore 2:2d87957b577b 39 } else
tanmaybangalore 2:2d87957b577b 40 _pin = 0.0; //turn off on last note
tanmaybangalore 2:2d87957b577b 41 }