Sonar Proximity Audio Alert for Robot
Dependencies: HC_SR04_Ultrasonic_Library Motor mbed-rtos mbed
Fork of rtos_basic by
Speaker.h@12:42d63181dbdb, 2017-03-13 (annotated)
- Committer:
- juubs
- Date:
- Mon Mar 13 18:35:56 2017 +0000
- Revision:
- 12:42d63181dbdb
Lab 4 Final
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
juubs | 12:42d63181dbdb | 1 | #include "mbed.h" |
juubs | 12:42d63181dbdb | 2 | // a new class to play a note on Speaker based on PwmOut class |
juubs | 12:42d63181dbdb | 3 | class Speaker |
juubs | 12:42d63181dbdb | 4 | { |
juubs | 12:42d63181dbdb | 5 | public: |
juubs | 12:42d63181dbdb | 6 | Speaker(PinName pin) : _pin(pin) { |
juubs | 12:42d63181dbdb | 7 | // _pin(pin) means pass pin to the Speaker Constructor |
juubs | 12:42d63181dbdb | 8 | } |
juubs | 12:42d63181dbdb | 9 | // class method to play a note based on PwmOut class |
juubs | 12:42d63181dbdb | 10 | void PlayNote(float frequency, float duration, float volume) { |
juubs | 12:42d63181dbdb | 11 | _pin.period(1.0/frequency); |
juubs | 12:42d63181dbdb | 12 | _pin = volume/2.0; |
juubs | 12:42d63181dbdb | 13 | wait(duration); |
juubs | 12:42d63181dbdb | 14 | _pin = 0.0; |
juubs | 12:42d63181dbdb | 15 | } |
juubs | 12:42d63181dbdb | 16 | |
juubs | 12:42d63181dbdb | 17 | private: |
juubs | 12:42d63181dbdb | 18 | PwmOut _pin; |
juubs | 12:42d63181dbdb | 19 | }; |