Bootloaders/Incomplete/MIDI/BootloaderMIDI.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Main source file for the MIDI bootloader. This file contains the main tasks of the demo and
  34  *  is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "BootloaderMIDI.h"
  38
  39 /** Main program entry point. This routine configures the hardware required by the application, then
  40  *  enters a loop to run the application tasks in sequence.
  41  */
  42 int main(void)
  43 {
  44         SetupHardware();
  45
  46         for (;;)
  47         {
  48                 MIDI_Task();
  49                 USB_USBTask();
  50         }
  51 }
  52
  53 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  54 void SetupHardware(void)
  55 {
  56         /* Disable watchdog if enabled by bootloader/fuses */
  57         MCUSR &= ~(1 << WDRF);
  58         wdt_disable();
  59
  60         /* Disable clock division */
  61         clock_prescale_set(clock_div_1);
  62
  63         /* Hardware Initialization */
  64         USB_Init();
  65 }
  66
  67 /** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
  68  *  of the USB device after enumeration - the device endpoints are configured and the MIDI management task started.
  69  */
  70 void EVENT_USB_Device_ConfigurationChanged(void)
  71 {
  72         /* Setup MIDI stream endpoints */
  73         Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPNUM, EP_TYPE_BULK,
  74                                    ENDPOINT_DIR_OUT, MIDI_STREAM_EPSIZE,
  75                                    ENDPOINT_BANK_SINGLE);
  76
  77         Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPNUM, EP_TYPE_BULK,
  78                                    ENDPOINT_DIR_IN, MIDI_STREAM_EPSIZE,
  79                                    ENDPOINT_BANK_SINGLE);
  80 }
  81
  82 /** Task to handle the generation of MIDI note change events in response to presses of the board joystick, and send them
  83  *  to the host.
  84  */
  85 void MIDI_Task(void)
  86 {
  87         /* Device must be connected and configured for the task to run */
  88         if (USB_DeviceState != DEVICE_STATE_Configured)
  89           return;
  90
  91         /* Select the MIDI OUT stream */
  92         Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPNUM);
  93
  94         if (Endpoint_IsOUTReceived())
  95         {
  96                 USB_MIDI_EventPacket_t InPacket;
  97                 Endpoint_Read_Stream_LE(&InPacket, sizeof(InPacket));
  98                 Endpoint_ClearOUT();
  99
 100                 uint8_t Channel = InPacket.Data1;
 101                 uint8_t Data    = ((InPacket.Data2 & 0x7F) | ((InPacket.Data3 == 64) ? 0x80 : 0x00));
 102
 103                 if ((Channel == MIDI_CONTROL_CHANNEL) && (Data == CONTROL_ENTER_PROG_MODE))
 104                 {
 105                         USB_MIDI_EventPacket_t MIDIIn = (USB_MIDI_EventPacket_t)
 106                                 {
 107                                         .CableNumber = 0,
 108                                         .Command     = (MIDI_COMMAND_NOTE_ON >> 4),
 109
 110                                         .Data1       = MIDI_COMMAND_NOTE_ON | MIDI_CONTROL_CHANNEL,
 111                                         .Data2       = CONTROL_DEVICE_READY,
 112                                         .Data3       = 32,
 113                                 };
 114
 115                         Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPNUM);
 116                         Endpoint_Write_Stream_LE(&MIDIIn, sizeof(MIDIIn));
 117                         Endpoint_ClearIN();
 118                 }
 119         }
 120 }