Merge pull request #1471 from qmk/lufa_lib

Update LUFA and move it to /lib/lufa

1 files changed, 224 insertions, 0 deletions

diff --git a/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.c b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.c
new file mode 100644
index 0000000000..0fdb04597c
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.c
@@ -0,0 +1,224 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Main source file for the MIDI input demo. This file contains the main tasks of the demo and
+ *  is responsible for the initial application hardware configuration.
+ */
+
+#include "MIDI.h"
+
+/** Main program entry point. This routine configures the hardware required by the application, then
+ *  enters a loop to run the application tasks in sequence.
+ */
+int main(void)
+{
+	SetupHardware();
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+	GlobalInterruptEnable();
+
+	for (;;)
+	{
+		MIDI_Task();
+		USB_USBTask();
+	}
+}
+
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
+{
+#if (ARCH == ARCH_AVR8)
+	/* Disable watchdog if enabled by bootloader/fuses */
+	MCUSR &= ~(1 << WDRF);
+	wdt_disable();
+
+	/* Disable clock division */
+	clock_prescale_set(clock_div_1);
+#elif (ARCH == ARCH_XMEGA)
+	/* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
+	XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
+	XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
+
+	/* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
+	XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
+	XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
+
+	PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
+#endif
+
+	/* Hardware Initialization */
+	Joystick_Init();
+	LEDs_Init();
+	Buttons_Init();
+	USB_Init();
+}
+
+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
+void EVENT_USB_Device_Connect(void)
+{
+	/* Indicate USB enumerating */
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
+ *  the status LEDs, disables the sample update and PWM output timers and stops the USB and MIDI management tasks.
+ */
+void EVENT_USB_Device_Disconnect(void)
+{
+	/* Indicate USB not ready */
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
+ *  of the USB device after enumeration - the device endpoints are configured and the MIDI management task started.
+ */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	bool ConfigSuccess = true;
+
+	/* Setup MIDI Data Endpoints */
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1);
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1);
+
+	/* Indicate endpoint configuration success or failure */
+	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
+}
+
+/** Task to handle the generation of MIDI note change events in response to presses of the board joystick, and send them
+ *  to the host.
+ */
+void MIDI_Task(void)
+{
+	static uint8_t PrevJoystickStatus;
+
+	/* Device must be connected and configured for the task to run */
+	if (USB_DeviceState != DEVICE_STATE_Configured)
+	  return;
+
+	Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPADDR);
+
+	if (Endpoint_IsINReady())
+	{
+		uint8_t MIDICommand = 0;
+		uint8_t MIDIPitch;
+
+		uint8_t JoystickStatus  = Joystick_GetStatus();
+		uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
+
+		/* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
+		uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
+
+		if (JoystickChanges & JOY_LEFT)
+		{
+			MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3C;
+		}
+
+		if (JoystickChanges & JOY_UP)
+		{
+			MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3D;
+		}
+
+		if (JoystickChanges & JOY_RIGHT)
+		{
+			MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3E;
+		}
+
+		if (JoystickChanges & JOY_DOWN)
+		{
+			MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3F;
+		}
+
+		if (JoystickChanges & JOY_PRESS)
+		{
+			MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3B;
+		}
+
+		/* Check if a MIDI command is to be sent */
+		if (MIDICommand)
+		{
+			MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
+				{
+					.Event       = MIDI_EVENT(0, MIDICommand),
+
+					.Data1       = MIDICommand | Channel,
+					.Data2       = MIDIPitch,
+					.Data3       = MIDI_STANDARD_VELOCITY,
+				};
+
+			/* Write the MIDI event packet to the endpoint */
+			Endpoint_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
+
+			/* Send the data in the endpoint to the host */
+			Endpoint_ClearIN();
+		}
+
+		/* Save previous joystick value for next joystick change detection */
+		PrevJoystickStatus = JoystickStatus;
+	}
+
+	/* Select the MIDI OUT stream */
+	Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPADDR);
+
+	/* Check if a MIDI command has been received */
+	if (Endpoint_IsOUTReceived())
+	{
+		MIDI_EventPacket_t MIDIEvent;
+
+		/* Read the MIDI event packet from the endpoint */
+		Endpoint_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
+
+		/* Check to see if the sent command is a note on message with a non-zero velocity */
+		if ((MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON)) && (MIDIEvent.Data3 > 0))
+		{
+			/* Change LEDs depending on the pitch of the sent note */
+			LEDs_SetAllLEDs(MIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
+		}
+		else
+		{
+			/* Turn off all LEDs in response to non Note On messages */
+			LEDs_SetAllLEDs(LEDS_NO_LEDS);
+		}
+
+		/* If the endpoint is now empty, clear the bank */
+		if (!(Endpoint_BytesInEndpoint()))
+		{
+			/* Clear the endpoint ready for new packet */
+			Endpoint_ClearOUT();
+		}
+	}
+}
+