225 lines
6.9 KiB
C
225 lines
6.9 KiB
C
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2017.
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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 2017 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 input demo. This file contains the main tasks of the demo and
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* is responsible for the initial application hardware configuration.
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*/
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#include "MIDI.h"
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/** Main program entry point. This routine configures the hardware required by the application, then
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* enters a loop to run the application tasks in sequence.
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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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MIDI_Task();
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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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/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
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void EVENT_USB_Device_Connect(void)
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{
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/* Indicate USB enumerating */
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LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
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}
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/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
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* the status LEDs, disables the sample update and PWM output timers and stops the USB and MIDI management tasks.
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*/
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void EVENT_USB_Device_Disconnect(void)
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{
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/* Indicate USB not ready */
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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}
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/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
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* of the USB device after enumeration - the device endpoints are configured and the MIDI management task started.
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*/
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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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/* Setup MIDI Data Endpoints */
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ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1);
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/* Indicate endpoint configuration success or failure */
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LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
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}
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/** Task to handle the generation of MIDI note change events in response to presses of the board joystick, and send them
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* to the host.
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*/
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void MIDI_Task(void)
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{
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static uint8_t PrevJoystickStatus;
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/* Device must be connected and configured for the task to run */
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if (USB_DeviceState != DEVICE_STATE_Configured)
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return;
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Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPADDR);
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if (Endpoint_IsINReady())
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{
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uint8_t MIDICommand = 0;
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uint8_t MIDIPitch;
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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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/* Check if a MIDI command is to be sent */
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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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/* Write the MIDI event packet to the endpoint */
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Endpoint_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
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/* Send the data in the endpoint to the host */
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Endpoint_ClearIN();
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}
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/* Save previous joystick value for next joystick change detection */
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PrevJoystickStatus = JoystickStatus;
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}
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/* Select the MIDI OUT stream */
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Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPADDR);
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/* Check if a MIDI command has been received */
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if (Endpoint_IsOUTReceived())
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{
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MIDI_EventPacket_t MIDIEvent;
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/* Read the MIDI event packet from the endpoint */
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Endpoint_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
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/* Check to see if the sent command is a note on message with a non-zero velocity */
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if ((MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON)) && (MIDIEvent.Data3 > 0))
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{
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/* Change LEDs depending on the pitch of the sent note */
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LEDs_SetAllLEDs(MIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
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}
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else
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{
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/* Turn off all LEDs in response to non Note On messages */
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LEDs_SetAllLEDs(LEDS_NO_LEDS);
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}
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/* If the endpoint is now empty, clear the bank */
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if (!(Endpoint_BytesInEndpoint()))
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{
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/* Clear the endpoint ready for new packet */
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Endpoint_ClearOUT();
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}
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}
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}
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