Diff: main.cpp

Revision:

0:33ad8330e62d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jun 10 21:53:29 2014 +0000
@@ -0,0 +1,47 @@
+/****************************************************************************************/
+/*                                 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*/
+/*****************************************************************************************/
\ No newline at end of file