Added new completed MIDIToneGenerator project.

LUFA/ManPages/ChangeLog.txt

@@ -9,7 +9,7 @@
   *  \section Sec_ChangeLogXXXXXX Version XXXXXX
   *  <b>New:</b>
   *  - Core:
-  *   - None
+  *   - Added new MIDIToneGenerator project
   *  - Library Applications:
   *   - Added new incomplete MIDIToneGenerator project
   *   - Added ability to write protect Mass Storage disk write operations from the host OS
@@ -25,7 +25,7 @@
   *  <b>Fixed:</b>
   *  - Core:
   *   - Fixed broken USBFOO board drivers due to missing BOARD_USBFOO define
-  *   - Fixed HID hpst class driver incorrectly binding to HID devices that do not have an OUT endpoint
+  *   - Fixed HID host class driver incorrectly binding to HID devices that do not have an OUT endpoint
   *  - Library Applications:
   *   - Fixed Benito project discarding incoming data from the USB virtual serial port when the USART is busy
   *   - Fixed broken DFU bootloader, added XPLAIN support for bootloader start when XCK jumpered to ground

LUFA/ManPages/LibraryApps.txt

@@ -102,6 +102,7 @@
  *    - <b>Benito</b> - Benito Board Arduino Programmer project
  *    - <b>LEDNotifier</b> - USB LED Notification project
  *    - <b>Magstripe</b> - Magnetic Stripe Card Reader project
+ *    - <b>MIDIToneGenerator</b> - MIDI Note Tone Generator project
  *    - <b>MissileLaucher</b> - Toy Missile Launcher Host project
  *    - <b>RelayBoard</b> - Relay board controller, controllable via the "sismpctl" Linux application
  *    - <b>TempDataLogger</b> - Temperature Datalogging project, using the FatFS library

Projects/MIDIToneGenerator/MIDIToneGenerator.c

@@ -109,7 +109,7 @@ int main(void)
 						LRUNoteStruct = &NoteData[i];
 						break;
 					}
-					else if (NoteData[i].LRUAge > LRUNoteStruct->LRUAge)
+					else if (NoteData[i].LRUAge >= LRUNoteStruct->LRUAge)
 					{
 						/* If an older entry that the current entry has been found, prefer overwriting that one */						
 						LRUNoteStruct = &NoteData[i];
@@ -161,9 +161,14 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
 	/* Sum together all the active notes to form a single sample */
 	for (uint8_t i = 0; i < MAX_SIMULTANEOUS_NOTES; i++)
 	{
+		/* A non-zero pitch indicates the note is active */
 		if (NoteData[i].Pitch)
 		{
-			MixedSample += SineTable[NoteData[i].TablePosition >> 24];
+			/* Use the top 8 bits of the table position as the sample table index */
+			uint8_t TableIndex = ((uint8_t*)&NoteData[i].TablePosition)[3];
+			
+			/* Add the new tone sample to the accumulator and increment the table position */
+			MixedSample += SineTable[TableIndex];
 			NoteData[i].TablePosition += NoteData[i].TableIncrement;
 		}
 	}

Projects/MIDIToneGenerator/MIDIToneGenerator.h

@@ -95,7 +95,7 @@
 			uint8_t  Pitch;
 			uint32_t TableIncrement;
 			uint32_t TablePosition;
-		} DDSNoteData;		
+		} DDSNoteData;
 
 	/* Function Prototypes: */
 		void SetupHardware(void);

Projects/MIDIToneGenerator/MIDIToneGenerator.txt

@@ -0,0 +1,73 @@
+/** \file
+ *
+ *  This file contains special DoxyGen information for the generation of the main page and other special
+ *  documentation pages. It is not a project source file.
+ */
+
+/** \mainpage MIDI Tone Generator Project
+ *
+ *  \section SSec_Compat Project Compatibility:
+ *
+ *  The following list indicates what microcontrollers are compatible with this project.
+ *
+ *  - Series 7 USB AVRs (AT90USBxxx7)
+ *  - Series 6 USB AVRs (AT90USBxxx6)
+ *  - Series 4 USB AVRs (ATMEGAxxU4)
+ *
+ *  \section SSec_Info USB Information:
+ *
+ *  The following table gives a rundown of the USB utilization of this project.
+ *
+ *  <table>
+ *   <tr>
+ *    <td><b>USB Mode:</b></td>
+ *    <td>Device</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>USB Class:</b></td>
+ *    <td>Audio Class</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>USB Subclass:</b></td>
+ *    <td>Standard Audio Device</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>Relevant Standards:</b></td>
+ *    <td>USBIF Audio Class Specification \n
+ *        USB-MIDI Audio Class Extension Specification \n
+ *        General MIDI Specification</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>Usable Speeds:</b></td>
+ *    <td>Full Speed Mode</td>
+ *   </tr>
+ *  </table>
+ *
+ *  \section SSec_Description Project Description:
+ *
+ *  MIDI note synthesiser project. This project implements a basic DDS frequency synthesiser, capable of producing 8-bit PWM sine
+ *  waves of variable frequency. When attached to a USB host, this project will allow for multiple MIDI notes to be synthesised into
+ *  audiable sound via PWM, using the notes sent to MIDI channel 1.
+ *
+ *  Outgoing audio will output in 8-bit PWM onto the timer 3 output compare channel A. Decouple the audio output with a capacitor
+ *  and attach to a speaker to hear the audio.
+ *
+ *  \section SSec_Options Project Options
+ *
+ *  The following defines can be found in this project, which can control the project behaviour when defined, or changed in value.
+ *
+ *  <table>
+ *   <tr>
+ *    <td><b>Define Name:</b></td>
+ *    <td><b>Location:</b></td>
+ *    <td><b>Description:</b></td>
+ *   </tr>
+ *   <tr>
+ *    <td>MAX_SIMULTANEOUS_NOTES</td>
+ *    <td>MIDIToneGenerator.h</td>
+ *    <td>Sets the maximum number of MIDI notes that can be generated simultaneously. More notes require more processing time,
+ *        and thus a value that is too high will cause audiable sound distortion due to insufficient CPU time.</td>
+ *   </tr>
+ *  </table>
+ */
+

Projects/MIDIToneGenerator/makefile

@@ -112,7 +112,7 @@ OBJDIR = .
 
 
 # Path to the LUFA library
-LUFA_PATH = ../../../
+LUFA_PATH = ../../
 
 
 # LUFA library compile-time options and predefined tokens
@@ -122,10 +122,6 @@ LUFA_OPTS += -D FIXED_NUM_CONFIGURATIONS=1
 LUFA_OPTS += -D USE_FLASH_DESCRIPTORS
 LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
 
-LUFA_OPTS += -D AUDIO_OUT_STEREO
-#LUFA_OPTS += -D AUDIO_OUT_MONO
-#LUFA_OPTS += -D AUDIO_OUT_PORTC
-
 
 # Create the LUFA source path variables by including the LUFA root makefile
 include $(LUFA_PATH)/LUFA/makefile

Projects/makefile

@@ -26,6 +26,9 @@ all:
 	$(MAKE) -C Magstripe clean
 	$(MAKE) -C Magstripe all
 
+	$(MAKE) -C MIDIToneGenerator clean
+	$(MAKE) -C MIDIToneGenerator all
+
 	$(MAKE) -C MissileLauncher clean
 	$(MAKE) -C MissileLauncher all