Added support for buzzer. (bluetooth now default off)

Marlin/Configuration.h

@@ -9,8 +9,8 @@
 //#define BAUDRATE 230400
 
 //Do you have a second serial you want activated (for bluetooth as example)
-#define SECOND_SERIAL MSerial1
-#define SECOND_SERIAL_BAUDRATE 115200
+//#define SECOND_SERIAL MSerial1
+//#define SECOND_SERIAL_BAUDRATE 115200
 
 // Chuck size for fast sd transfer
 #define SD_FAST_XFER_CHUNK_SIZE 1024

Marlin/Marlin.h

@@ -36,9 +36,7 @@
 #endif
 
 #include "MarlinSerial.h"
-#ifdef SECOND_SERIAL
-    #include "SerialManager.h" 
-#endif //SECOND_SERIAL
+#include "SerialManager.h" 
 
 
 #ifndef cbi

Marlin/Marlin.pde

@@ -34,6 +34,7 @@
 
 #include "ultralcd.h"
 #include "led.h"
+#include "buzzer.h"
 #include "planner.h"
 #include "stepper.h"
 #include "temperature.h"
@@ -275,6 +276,7 @@ void setup()
   #if (LED_PIN > -1)
     led_init();
   #endif
+  buzzer_init();
   setup_photpin();
 }
 
@@ -1195,7 +1197,15 @@ FORCE_INLINE void process_commands()
       SERIAL_ECHO(freeMemory());
     }
     break;
-
+    case 601: //Play tone
+    {
+        int tone = 1915;
+        int duration = 300;
+        if(code_seen('T')) tone = code_value() ;
+        if(code_seen('D')) duration = code_value() ;
+        playTone(tone, duration);
+    }
+    break;
     }
   }
 

Marlin/buzzer.cpp

@@ -0,0 +1,36 @@
+#include "buzzer.h"
+#ifdef BUZZER_PIN
+#if (BUZZER_PIN > -1)
+void buzzer_init()
+{
+    SET_OUTPUT(BUZZER_PIN);
+    WRITE(BUZZER_PIN, LOW);
+
+}
+
+void playTone(int tone, int duration) 
+{
+  for (long i = 0; i < duration * 1000L; i += tone * 2) {
+    digitalWrite(BUZZER_PIN, HIGH);
+    delayMicroseconds(tone);
+    digitalWrite(BUZZER_PIN, LOW);
+    delayMicroseconds(tone);
+  }
+}
+
+void playNote(char note, int duration) {
+  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
+  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
+
+  // play the tone corresponding to the note name
+  for (int i = 0; i < 8; i++) {
+    if (names[i] == note) {
+      playTone(tones[i], duration);
+    }
+  }
+}
+
+#endif
+#endif //BUZZER_PIN
+
+

Marlin/buzzer.h

@@ -0,0 +1,17 @@
+#ifndef __BUZZERH
+#define __BUZZERH
+
+#include "Marlin.h"
+
+#if (defined(BUZZER_PIN) && (BUZZER_PIN > -1))  
+  void buzzer_init();
+  void playTone(int tone, int duration);
+  void playNote(char note, int duration);
+
+#else 
+  FORCE_INLINE void buzzer_init() {};
+  FORCE_INLINE void playTone(int tone, int duration) {};
+  FORCE_INLINE void playNote(char note, int duration) {};
+#endif 
+
+#endif

Marlin/pins.h

@@ -488,6 +488,7 @@
 /*#define PROBE_PIN          11*/
 
 #define LED_PIN            27
+#define BUZZER_PIN         28
 
 #define FAN_PIN            -1