Added incomplete MIDIToneGenerator project.

[pub/USBasp.git] / Demos / Device / LowLevel / MIDI / MIDI.c

diff --git a/Demos/Device/LowLevel/MIDI/MIDI.c b/Demos/Device/LowLevel/MIDI/MIDI.c
index 856f7db..edfc56f 100644 (file)
--- a/Demos/Device/LowLevel/MIDI/MIDI.c
+++ b/Demos/Device/LowLevel/MIDI/MIDI.c
@@ -1,21 +1,21 @@
 /*\r
              LUFA Library\r
 /*\r
              LUFA Library\r

-     Copyright (C) Dean Camera, 2009.\r
+     Copyright (C) Dean Camera, 2010.\r

               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r
               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r

-  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
-  Permission to use, copy, modify, and distribute this software\r
-  and its documentation for any purpose and without fee is hereby\r
-  granted, provided that the above copyright notice appear in all\r
-  copies and that both that the copyright notice and this\r
-  permission notice and warranty disclaimer appear in supporting\r
-  documentation, and that the name of the author not be used in\r
-  advertising or publicity pertaining to distribution of the\r
+  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+\r
+  Permission to use, copy, modify, distribute, and sell this \r
+  software and its documentation for any purpose is hereby granted\r
+  without fee, provided that the above copyright notice appear in \r
+  all copies and that both that the copyright notice and this\r
+  permission notice and warranty disclaimer appear in supporting \r
+  documentation, and that the name of the author not be used in \r
+  advertising or publicity pertaining to distribution of the \r

   software without specific, written prior permission.\r
 \r
   The author disclaim all warranties with regard to this\r
   software without specific, written prior permission.\r
 \r
   The author disclaim all warranties with regard to this\r


@@ -37,7 +37,7 @@
 #include "MIDI.h"\r
 \r
 /** Main program entry point. This routine configures the hardware required by the application, then\r
 #include "MIDI.h"\r
 \r
 /** Main program entry point. This routine configures the hardware required by the application, then\r

- *  starts the scheduler to run the application tasks.\r
+ *  enters a loop to run the application tasks in sequence.\r

  */\r
 int main(void)\r
 {\r
  */\r
 int main(void)\r
 {\r


@@ -70,7 +70,7 @@ void SetupHardware(void)
 }\r
 \r
 /** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */\r
 }\r
 \r
 /** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */\r

-void EVENT_USB_Connect(void)\r
+void EVENT_USB_Device_Connect(void)\r

 {\r
        /* Indicate USB enumerating */\r
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
 {\r
        /* Indicate USB enumerating */\r
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r


@@ -79,7 +79,7 @@ void EVENT_USB_Connect(void)
 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via\r
  *  the status LEDs, disables the sample update and PWM output timers and stops the USB and MIDI management tasks.\r
  */\r
 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via\r
  *  the status LEDs, disables the sample update and PWM output timers and stops the USB and MIDI management tasks.\r
  */\r

-void EVENT_USB_Disconnect(void)\r
+void EVENT_USB_Device_Disconnect(void)\r

 {\r
        /* Indicate USB not ready */\r
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
 {\r
        /* Indicate USB not ready */\r
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r


@@ -88,7 +88,7 @@ void EVENT_USB_Disconnect(void)
 /** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration\r
  *  of the USB device after enumeration - the device endpoints are configured and the MIDI management task started.\r
  */\r
 /** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration\r
  *  of the USB device after enumeration - the device endpoints are configured and the MIDI management task started.\r
  */\r

-void EVENT_USB_ConfigurationChanged(void)\r
+void EVENT_USB_Device_ConfigurationChanged(void)\r

 {\r
        /* Indicate USB connected and ready */\r
        LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
 {\r
        /* Indicate USB connected and ready */\r
        LEDs_SetAllLEDs(LEDMASK_USB_READY);\r


@@ -116,13 +116,17 @@ void MIDI_Task(void)
 {\r
        static uint8_t PrevJoystickStatus;\r
 \r
 {\r
        static uint8_t PrevJoystickStatus;\r
 \r

-       /* Select the MIDI IN stream */\r
+       /* Device must be connected and configured for the task to run */\r
+       if (USB_DeviceState != DEVICE_STATE_Configured)\r
+         return;\r
+\r

        Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPNUM);\r
 \r
        Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPNUM);\r
 \r

-       /* Check if endpoint is ready to be written to */\r

        if (Endpoint_IsINReady())\r
        {\r
        if (Endpoint_IsINReady())\r
        {\r

-               /* Get current joystick mask, XOR with previous to detect joystick changes */\r
+               uint8_t MIDICommand = 0;\r
+               uint8_t MIDIPitch;\r
+       \r

                uint8_t JoystickStatus  = Joystick_GetStatus();\r
                uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);\r
                \r
                uint8_t JoystickStatus  = Joystick_GetStatus();\r
                uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);\r
                \r


@@ -130,20 +134,55 @@ void MIDI_Task(void)
                uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));\r
 \r
                if (JoystickChanges & JOY_LEFT)\r
                uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));\r
 \r
                if (JoystickChanges & JOY_LEFT)\r

-                 SendMIDINoteChange(0x3C, (JoystickStatus & JOY_LEFT), 0, Channel);\r
+               {\r
+                       MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);\r
+                       MIDIPitch   = 0x3C;\r
+               }\r

 \r
                if (JoystickChanges & JOY_UP)\r
 \r
                if (JoystickChanges & JOY_UP)\r

-                 SendMIDINoteChange(0x3D, (JoystickStatus & JOY_UP), 0, Channel);\r
+               {\r
+                       MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);\r
+                       MIDIPitch   = 0x3D;\r
+               }\r

 \r
                if (JoystickChanges & JOY_RIGHT)\r
 \r
                if (JoystickChanges & JOY_RIGHT)\r

-                 SendMIDINoteChange(0x3E, (JoystickStatus & JOY_RIGHT), 0, Channel);\r
-\r
+               {\r
+                       MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);\r
+                       MIDIPitch   = 0x3E;\r
+               }\r
+               \r

                if (JoystickChanges & JOY_DOWN)\r
                if (JoystickChanges & JOY_DOWN)\r

-                 SendMIDINoteChange(0x3F, (JoystickStatus & JOY_DOWN), 0, Channel);\r
+               {\r
+                       MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);\r
+                       MIDIPitch   = 0x3F;\r
+               }\r

 \r
                if (JoystickChanges & JOY_PRESS)\r
 \r
                if (JoystickChanges & JOY_PRESS)\r

-                 SendMIDINoteChange(0x3B, (JoystickStatus & JOY_PRESS), 0, Channel);\r
-\r
+               {\r
+                       MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);\r
+                       MIDIPitch   = 0x3B;\r
+               }\r
+\r
+               /* Check if a MIDI command is to be sent */\r
+               if (MIDICommand)\r
+               {\r
+                       USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t)\r
+                               {\r
+                                       .CableNumber = 0,\r
+                                       .Command     = (MIDICommand >> 4),\r
+                                       \r
+                                       .Data1       = MIDICommand | Channel,\r
+                                       .Data2       = MIDIPitch,\r
+                                       .Data3       = MIDI_STANDARD_VELOCITY,                  \r
+                               };\r
+                               \r
+                       /* Write the MIDI event packet to the endpoint */\r
+                       Endpoint_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent));\r
+               \r
+                       /* Send the data in the endpoint to the host */\r
+                       Endpoint_ClearIN();\r
+               }\r
+               \r

                /* Save previous joystick value for next joystick change detection */\r
                PrevJoystickStatus = JoystickStatus;\r
        }\r
                /* Save previous joystick value for next joystick change detection */\r
                PrevJoystickStatus = JoystickStatus;\r
        }\r


@@ -151,35 +190,27 @@ void MIDI_Task(void)
        /* Select the MIDI OUT stream */\r
        Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPNUM);\r
 \r
        /* Select the MIDI OUT stream */\r
        Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPNUM);\r
 \r

-       /* Check if endpoint is ready to be read from, if so discard its (unused) data */\r
+       /* Check if a MIDI command has been received */\r

        if (Endpoint_IsOUTReceived())\r
        if (Endpoint_IsOUTReceived())\r

-         Endpoint_ClearOUT();\r
-}\r
-\r
-/** Sends a MIDI note change event (note on or off) to the MIDI output jack, on the given virtual cable ID and channel.\r
- *\r
- *  \param Pitch    Pitch of the note to turn on or off\r
- *  \param OnOff    Set to true if the note is on (being held down), or false otherwise\r
- *  \param CableID  ID of the virtual cable to send the note change to\r
- *  \param Channel  MIDI channel number to send the note change event to\r
- */\r
-void SendMIDINoteChange(const uint8_t Pitch, const bool OnOff, const uint8_t CableID, const uint8_t Channel)\r
-{\r
-       /* If endpoint ready for more data, abort */\r
-       if (!(Endpoint_IsReadWriteAllowed()))\r
-         return;\r
-\r
-       /* Check if the message should be a Note On or Note Off command */\r
-       uint8_t Command = ((OnOff)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);\r
-\r
-       /* Write the Packet Header to the endpoint */\r
-       Endpoint_Write_Byte((CableID << 4) | (Command >> 4));\r
-\r
-       /* Write the Note On/Off command with the specified channel, pitch and velocity */\r
-       Endpoint_Write_Byte(Command | Channel);\r
-       Endpoint_Write_Byte(Pitch);\r
-       Endpoint_Write_Byte(MIDI_STANDARD_VELOCITY);\r
+       {\r
+               USB_MIDI_EventPacket_t MIDIEvent;\r
+                       \r
+               /* Read the MIDI event packet from the endpoint */\r
+               Endpoint_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent));\r

        \r
        \r

-       /* Send the data in the endpoint to the host */\r
-       Endpoint_ClearIN();\r
+               /* Check to see if the sent command is a note on message with a non-zero velocity */\r
+               if ((MIDIEvent.Command == (MIDI_COMMAND_NOTE_ON >> 4)) && (MIDIEvent.Data3 > 0))\r
+               {\r
+                       /* Change LEDs depending on the pitch of the sent note */\r
+                       LEDs_SetAllLEDs(MIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);\r
+               }\r
+               else\r
+               {\r
+                       /* Turn off all LEDs in response to non Note On messages */\r
+                       LEDs_SetAllLEDs(LEDS_NO_LEDS);\r
+               }\r
+       \r
+               /* Clear the endpoint ready for new packet */\r
+               Endpoint_ClearOUT();\r
+       }\r

 }\r
 }\r