Lee Nam Cheol / Mbed OS lab03-pwm-music

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main.cpp@1:45d0e3e16b3a, 2020-04-21 (annotated)

Committer:
namcheol
Date:
Tue Apr 21 12:19:09 2020 +0000
Revision:
1:45d0e3e16b3a
Parent:
0:f31836d48420 
lab03-pwm-music

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dshin 0:f31836d48420 1 #include "mbed.h"
namcheol 1:45d0e3e16b3a 2 #include "pitches.h"
dshin 0:f31836d48420 3
namcheol 1:45d0e3e16b3a 4 PwmOut buzzer(PTA1); //buzzer = PTA1
namcheol 1:45d0e3e16b3a 5 int length = 56;
namcheol 1:45d0e3e16b3a 6 float frequency[] = {NOTE_E6, NOTE_DS6, NOTE_E6, NOTE_DS6, NOTE_E6, NOTE_B5, NOTE_D6, NOTE_C6, NOTE_A5,
namcheol 1:45d0e3e16b3a 7 NOTE_C5, NOTE_E5, NOTE_A5, NOTE_B5,
namcheol 1:45d0e3e16b3a 8 NOTE_E5, NOTE_GS5, NOTE_B5, NOTE_C6,
namcheol 1:45d0e3e16b3a 9 NOTE_E6, NOTE_DS6, NOTE_E6, NOTE_DS6, NOTE_E6, NOTE_B5, NOTE_D6,NOTE_C6, NOTE_A5,
namcheol 1:45d0e3e16b3a 10 NOTE_C5, NOTE_E5, NOTE_A5, NOTE_B5,
namcheol 1:45d0e3e16b3a 11 NOTE_E5, NOTE_GS5, NOTE_B5, NOTE_C6,
namcheol 1:45d0e3e16b3a 12 NOTE_B5, NOTE_C6, NOTE_D6, NOTE_E6,
namcheol 1:45d0e3e16b3a 13 NOTE_G5, NOTE_F6, NOTE_E6, NOTE_D6,
namcheol 1:45d0e3e16b3a 14 NOTE_F5, NOTE_E6, NOTE_D6, NOTE_C6,
namcheol 1:45d0e3e16b3a 15 NOTE_E5, NOTE_D6, NOTE_C6, NOTE_B5,
namcheol 1:45d0e3e16b3a 16 NOTE_E5, NOTE_E6};
namcheol 1:45d0e3e16b3a 17 float beat[] = {12,12,12,12,12,12,12,12,9,
namcheol 1:45d0e3e16b3a 18 12,12,12,9,
namcheol 1:45d0e3e16b3a 19 12,12,12,9,
namcheol 1:45d0e3e16b3a 20 12,12,12,12,12,12,12,12,9,
namcheol 1:45d0e3e16b3a 21 12,12,12,9,
namcheol 1:45d0e3e16b3a 22 12,12,12,9,
namcheol 1:45d0e3e16b3a 23 12,12,12,9,
namcheol 1:45d0e3e16b3a 24 12,12,12,9,
namcheol 1:45d0e3e16b3a 25 12,12,12,9,
namcheol 1:45d0e3e16b3a 26 12,12,12,9,
namcheol 1:45d0e3e16b3a 27 12,9};
dshin 0:f31836d48420 28
dshin 0:f31836d48420 29
dshin 0:f31836d48420 30 int main()
dshin 0:f31836d48420 31 {
namcheol 1:45d0e3e16b3a 32 while(true) {
namcheol 1:45d0e3e16b3a 33 for(int i = 0; i <= length; i++) {
namcheol 1:45d0e3e16b3a 34 if(frequency[i] == 0)
namcheol 1:45d0e3e16b3a 35 buzzer = 0.0;
namcheol 1:45d0e3e16b3a 36 else {
namcheol 1:45d0e3e16b3a 37 buzzer.period(1.0 / frequency[i]); //period = (1.0 / frequency)
namcheol 1:45d0e3e16b3a 38 buzzer = 0.5; //duty cycle = 50%
namcheol 1:45d0e3e16b3a 39 }
namcheol 1:45d0e3e16b3a 40 thread_sleep_for(3500.0 / beat[i]); //duration = (C / beat)ms
namcheol 1:45d0e3e16b3a 41 }
dshin 0:f31836d48420 42 }
dshin 0:f31836d48420 43 }