212 řádky
6.2 KiB
C
212 řádky
6.2 KiB
C
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2014.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2014 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaims all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Main source file for the MIDI demo. This file contains the main tasks of
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* the demo and is responsible for the initial application hardware configuration.
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*/
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#include "MIDI.h"
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/** LUFA MIDI Class driver interface configuration and state information. This structure is
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* passed to all MIDI Class driver functions, so that multiple instances of the same class
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* within a device can be differentiated from one another.
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*/
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USB_ClassInfo_MIDI_Device_t Keyboard_MIDI_Interface =
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{
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.Config =
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{
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.StreamingInterfaceNumber = INTERFACE_ID_AudioStream,
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.DataINEndpoint =
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{
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.Address = MIDI_STREAM_IN_EPADDR,
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.Size = MIDI_STREAM_EPSIZE,
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.Banks = 1,
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},
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.DataOUTEndpoint =
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{
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.Address = MIDI_STREAM_OUT_EPADDR,
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.Size = MIDI_STREAM_EPSIZE,
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.Banks = 1,
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},
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},
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};
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/** Main program entry point. This routine contains the overall program flow, including initial
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* setup of all components and the main program loop.
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*/
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int main(void)
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{
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SetupHardware();
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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GlobalInterruptEnable();
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for (;;)
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{
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CheckJoystickMovement();
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MIDI_EventPacket_t ReceivedMIDIEvent;
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while (MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent))
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{
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if ((ReceivedMIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON)) && (ReceivedMIDIEvent.Data3 > 0))
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LEDs_SetAllLEDs(ReceivedMIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
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else
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LEDs_SetAllLEDs(LEDS_NO_LEDS);
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}
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MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
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USB_USBTask();
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}
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}
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/** Configures the board hardware and chip peripherals for the demo's functionality. */
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void SetupHardware(void)
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{
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#if (ARCH == ARCH_AVR8)
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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wdt_disable();
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/* Disable clock division */
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clock_prescale_set(clock_div_1);
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#elif (ARCH == ARCH_XMEGA)
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/* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
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XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
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XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
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/* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
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XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
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XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
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PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
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#endif
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/* Hardware Initialization */
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Joystick_Init();
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LEDs_Init();
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Buttons_Init();
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USB_Init();
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}
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/** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
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void CheckJoystickMovement(void)
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{
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static uint8_t PrevJoystickStatus;
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uint8_t MIDICommand = 0;
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uint8_t MIDIPitch;
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/* Get current joystick mask, XOR with previous to detect joystick changes */
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uint8_t JoystickStatus = Joystick_GetStatus();
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uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
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/* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
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uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
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if (JoystickChanges & JOY_LEFT)
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{
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MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
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MIDIPitch = 0x3C;
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}
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if (JoystickChanges & JOY_UP)
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{
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MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
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MIDIPitch = 0x3D;
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}
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if (JoystickChanges & JOY_RIGHT)
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{
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MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
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MIDIPitch = 0x3E;
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}
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if (JoystickChanges & JOY_DOWN)
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{
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MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
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MIDIPitch = 0x3F;
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}
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if (JoystickChanges & JOY_PRESS)
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{
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MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
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MIDIPitch = 0x3B;
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}
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if (MIDICommand)
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{
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MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
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{
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.Event = MIDI_EVENT(0, MIDICommand),
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.Data1 = MIDICommand | Channel,
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.Data2 = MIDIPitch,
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.Data3 = MIDI_STANDARD_VELOCITY,
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};
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MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
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MIDI_Device_Flush(&Keyboard_MIDI_Interface);
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}
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PrevJoystickStatus = JoystickStatus;
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}
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/** Event handler for the library USB Connection event. */
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void EVENT_USB_Device_Connect(void)
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{
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LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
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}
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/** Event handler for the library USB Disconnection event. */
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void EVENT_USB_Device_Disconnect(void)
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{
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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}
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/** Event handler for the library USB Configuration Changed event. */
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void EVENT_USB_Device_ConfigurationChanged(void)
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{
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bool ConfigSuccess = true;
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ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface);
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LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
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}
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/** Event handler for the library USB Control Request reception event. */
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void EVENT_USB_Device_ControlRequest(void)
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{
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MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);
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}
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