Diff: main.cpp

Revision:

3:2af917fe09c3

Parent:

2:85d8ce475baa

--- a/main.cpp	Thu Nov 26 09:28:03 2015 +0000
+++ b/main.cpp	Fri Dec 04 10:11:15 2015 +0000
@@ -4,24 +4,72 @@
 #include "mbed.h"
 #include "SongPlayer.h"
 
-//Set up notes and durations for sample song to play
-// A 0.0 duration note at end terminates song play
-float note[18]= {1568.0,1396.9,1244.5,1244.5,1396.9,1568.0,1568.0,1568.0,1396.9,
-                 1244.5,1396.9,1568.0,1396.9,1244.5,1174.7,1244.5,1244.5, 0.0
-                };
-float duration[18]= {0.48,0.24,0.72,0.48,0.24,0.48,0.24,0.24,0.24,
-                     0.24,0.24,0.24,0.24,0.48,0.24,0.48,0.48, 0.0
-                    };
+// Potentiometer to handle the volume
+#define ANALOG_POTENTIOMETER P0_22
+AnalogIn   ain(ANALOG_POTENTIOMETER);
+
+#define MUTE  0.0
+#define END   1.0
+
+//-- Notes and frequencies (Hz)
+#define DO_4  261.626
+#define MI_4  329.628 
+#define SOL_4 391.995 
+#define SI_4  493.883
+#define DO_5  523.251
+
+//-- Tempo
+#define TEMPO 200
+
+//-- Default volume
+float VOL = 0.5;
+
+//-- Notes for the imperial march. MUTE means silence.  END for marking the end
+float notes[] = {MI_4, MUTE, MI_4, MUTE, MI_4, MUTE, DO_4, SOL_4, MI_4, MUTE, DO_4,  SOL_4,  MI_4, MUTE, 
+                 SI_4, MUTE, SI_4, MUTE, SI_4, MUTE, DO_5, SOL_4, MI_4, MUTE, DO_4,  SOL_4,  MI_4, END};
+                 
+//--  Notes duration                 
+float tempo[] = {2   ,    1,    2,    1,    2,   1,    2,     1,    2,    1,    2,      1,     2,    3,  
+                 2   ,    1,    2,    1,    2,   1,    2,     1,    2,    1,    2,      1,     2,    0};
+
+//-- Declare speaker object
+PwmOut speaker(P0_8);
+
+void play()
+{
+  int i=0;
+  //-- Reproduce all the notes in the list
+  while(notes[i] != END) {
+    
+    //-- If silence, turn of the PWM
+    if (notes[i] == MUTE) {
+      speaker = 0.0;
+    }
+    else {
+      speaker.period(1.0/notes[i]);               //-- Note
+      float potenciometro = ain.read() * 0.7f;    // Handle the volume with the potentiometer 
+      speaker = potenciometro;                    //-- Set the volume
+    }  
+    
+    //-- Note duration
+    wait_ms(TEMPO * tempo[i]);
+    
+    //-- Move to the next note
+    i++;
+  }  
+  
+  //-- Turn off the speacker
+  speaker = MUTE;
+}
+
 
 int main()
 {
-    // Buzzer pin
-    SongPlayer mySpeaker(P0_8);
-    // Start song and return once playing starts
-    mySpeaker.PlaySong(note,duration);
-    // loops forever while song continues to play to end using interrupts
-    while(1) {
-        wait(.1);
-    }
+
+    while(1){
+         // Play the song!!
+         play();
+         wait_ms(500);        
+    } ;
 }