Plays the happy birthday song music on the speaker.
Dependencies: DebounceInterrupts mbed
main.cpp
- Committer:
- bhakti08
- Date:
- 2014-06-10
- Revision:
- 0:33ad8330e62d
File content as of revision 0:33ad8330e62d:
/****************************************************************************************/ /* IO DEVICES ASSIGNMENT 6 */ /*This program uses the PWM output to generate a "HAPPY BIRTHDAY" Tone on the speaker */ /****************************************************************************************/ #include "mbed.h" // ms #define A4 440 #define B4b 446 #define C4 261 #define C4_1 130 #define C5 523 #define D4 293 #define D4b 277 #define E4 329 #define F4 349 #define G4 392 PwmOut buzzer(p26); float notes[] = {C4_1,C4,D4,C4,F4,E4,C4_1,C4,D4,C4,G4,F4,C4_1,C4,C5,A4,F4,E4,D4,B4b,B4b,A4,F4,G4,F4}; float interval[] = {4, 4, 8, 8, 8, 10, 4, 4, 8, 8, 8, 10, 4, 4, 8, 8, 8, 8, 8, 4, 4, 8, 8, 8, 12}; int main() { while (1) { for (int i=0;i<=24;i++) { buzzer.period((1/notes[i])); // set PWM period buzzer=0.5; // set duty cycle wait(0.8*interval[i]/10); // hold for beat period } buzzer = 0; wait(5); } } /****************************************************************************************/ /* TESTING */ /****************************************************************************************/ /*1. Power up the mbed, load the program and press the reset button. The tone should play*/ /* as long as the mbed is powered up. PASS*/ /*****************************************************************************************/