Diff: main.cpp

Revision:

0:586507ee54a5

Child:

1:e3b759c26b28

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon May 09 19:50:27 2016 +0000
@@ -0,0 +1,31 @@
+#include "mbed.h"       // this tells us to load mbed related functions
+#include "tones.h"                   // list of all the tones and their frequencies
+
+InterruptIn btn2(SW2);               // we create a variable 'btn2', use it as an in port
+InterruptIn btn3(SW3);               // we create a variable 'btn3', use it as an in port
+
+PwmOut buzzer(D3);                   // our buzzer is a PWM output (pulse-width modulation)
+
+Timeout tone_timeout;  //TimeOut = a interrupt to call a function after a specified delay
+
+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, int duration) {
+    buzzer.period_us(tone);
+    buzzer.write(0.10f); // 10% duty cycle, otherwise it's too loud
+    
+    // we wait for duration ms. and then call the silence function
+    tone_timeout.attach_us(&silence, duration*1000); // setup tone_timeout to call silence after duration ms
+}
+
+// YOUR CODE HERE
+
+// this code runs when the microcontroller starts up
+int main() {
+    btn2.fall(play_note1);
+    btn3.fall(play_note2);
+}