Diff: main.cpp

Revision:

0:0fb17f0d39e7

Child:

1:8922cc02aec7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon May 09 19:52:47 2016 +0000
@@ -0,0 +1,53 @@
+#include "mbed.h"       // this tells us to load mbed  related functions
+#include "tones.h"                   // list of all the tones and their frequencies
+
+PwmOut buzzer(D3);                   // our buzzer is a PWM output (pulse-width modulation)
+
+static int BPM = 120;
+
+static void silence() {
+    buzzer.write(0.0f); // silence!
+}
+
+// this is our function that plays a tone. 
+// Takes in a tone frequency, and after duration (in ms.) we stop playing again
+static void play_tone(int tone) {
+    buzzer.period_us(tone);
+    buzzer.write(0.10f); // 10% duty cycle, otherwise it's too loud
+}
+
+static void play_song(int notes_left, int* melody, int* duration) {
+    // YOUR CODE HERE
+}
+
+// this code runs when the microcontroller starts up
+void main() {
+    // declare a melody
+    int melody[] = {
+        NOTE_E4, NOTE_D4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_E4, NOTE_E4, 
+        NOTE_D4, NOTE_D4, NOTE_D4, NOTE_E4, NOTE_E4, NOTE_E4, 
+        NOTE_E4, NOTE_D4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_E4, NOTE_E4, 
+        NOTE_C4, NOTE_D4, NOTE_D4, NOTE_E4, NOTE_D4, NOTE_C4
+    };
+
+    // note durations: 4 = quarter note, 8 = eighth note, etc.:
+    int duration[] = {
+        4, 4, 4, 4, 4, 4, 2, 
+        4, 4, 2, 4, 4, 2,
+        4, 4, 4, 4, 4, 4, 4,
+        4, 4, 4, 4, 4, 2
+    };
+    
+    // melody & duration are on the heap, need to get them on the stack
+    int *m = new int[sizeof(melody) / sizeof(int)];
+    memcpy(m, melody, sizeof(melody));
+    int *d = new int[sizeof(duration) / sizeof(int)];
+    memcpy(d, duration, sizeof(duration));
+    
+    if (sizeof(melody) != sizeof(duration)) {
+        printf("Melody and duration do not have same number of elements! Aborting!\r\n");
+        return;
+    }
+    
+    play_song(sizeof(melody) / sizeof(int), m, d);
+}