Diff: Buzzer.cpp

Revision:

0:c02f01feda7b

diff -r 000000000000 -r c02f01feda7b Buzzer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Buzzer.cpp	Sat May 09 21:29:00 2015 +0000
@@ -0,0 +1,103 @@
+#include "Buzzer.h"
+
+
+/*
+  Buzzer
+ The example use a buzzer to play melodies. It sends a square wave of the 
+ appropriate frequency to the buzzer, generating the corresponding tone.
+ 
+ The circuit:
+ * Buzzer attached to pin39 (J14 plug on Grove Base BoosterPack)
+ * one side pin (either one) to ground
+ * the other side pin to VCC
+ * LED anode (long leg) attached to RED_LED
+ * LED cathode (short leg) attached to ground
+ 
+ * Note:  
+ 
+ 
+ This example code is in the public domain.
+ 
+ http://www.seeedstudio.com/wiki/index.php?title=GROVE_-_Starter_Kit_v1.1b#Grove_-_Buzzer
+ 
+*/
+static DigitalOut Buzzer(BUZZER_PIN);
+
+/* play tone */
+void playTone(int tone, int duration) {
+  for (long i = 0; i < duration * 1000L; i += tone * 2) {
+    Buzzer = 1;
+    wait_us(tone);
+    Buzzer = 0;
+    wait_us(tone);
+  }
+}
+
+void playNote(char note, int range, int duration) {
+   int cTones[] = { 3822, 1911, 956, 478};
+   int CTones[] = { 3608, 1803, 902 };
+   int dTones[] = { 3405, 1702, 851 };
+   int DTones[] = { 3214, 1607, 803 };
+   int eTones[] = { 3034, 1517, 758 };
+   int fTones[] = { 2863, 1432, 716 };
+   int FTones[] = { 2702, 1351, 675 };
+   int gTones[] = { 2551, 1275, 638 };
+   int GTones[] = { 2408, 1204, 602 };
+   int aTones[] = { 2273, 1136, 568 };
+   int ATones[] = { 2145, 1072, 536 };
+   int bTones[] = { 2025, 1013, 506 };
+  
+   // play the tone corresponding to the note name
+   switch (note) {
+   case 'a':
+      playTone(aTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'A':
+      playTone(ATones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'b':
+      playTone(bTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'c':
+      playTone(cTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'C':
+      playTone(CTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'd':
+      playTone(dTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'D':
+      playTone(DTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'e':
+      playTone(eTones[range - RANGE_OFFSET], duration);
+      break;
+
+   case 'f':
+      playTone(fTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'F':
+      playTone(FTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'g':
+      playTone(gTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   case 'G': 
+      playTone(GTones[range - RANGE_OFFSET], duration);
+      break;
+   
+   default:
+      playTone(cTones[0], duration);
+  }
+}
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