2 files changed, 0 insertions, 259 deletions
diff --git a/lib/lufa b/lib/lufa
new file mode 160000
+Subproject ce10f7642b0459e409839b23cc91498945119b4
diff --git a/lib/lufa/Demos/Device/LowLevel/AudioInput/AudioInput.c b/lib/lufa/Demos/Device/LowLevel/AudioInput/AudioInput.c
deleted file mode 100644
index 2cf2414663..0000000000
--- a/lib/lufa/Demos/Device/LowLevel/AudioInput/AudioInput.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
-             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 Audio Input demo. This file contains the main tasks of the demo and
- *  is responsible for the initial application hardware configuration.
- */
-
-#include "AudioInput.h"
-
-/** Flag to indicate if the streaming audio alternative interface has been selected by the host. */
-static bool StreamingAudioInterfaceSelected = false;
-
-/** Current audio sampling frequency of the streaming audio endpoint. */
-static uint32_t CurrentAudioSampleFrequency = 48000;
-
-
-/** Main program entry point. This routine contains the overall program flow, including initial
- *  setup of all components and the main program loop.
- */
-int main(void)
-{
-	SetupHardware();
-
-	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	GlobalInterruptEnable();
-
-	for (;;)
-	{
-		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);
-#endif
-
-	/* Hardware Initialization */
-	LEDs_Init();
-	Buttons_Init();
-	ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
-	ADC_SetupChannel(MIC_IN_ADC_CHANNEL);
-	USB_Init();
-
-	/* Start the ADC conversion in free running mode */
-	ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | ADC_GET_CHANNEL_MASK(MIC_IN_ADC_CHANNEL));
-}
-
-/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs, and
- *  configures the sample update and PWM timers.
- */
-void EVENT_USB_Device_Connect(void)
-{
-	/* Indicate USB enumerating */
-	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
-
-	/* Sample reload timer initialization */
-	TIMSK0  = (1 << OCIE0A);
-	OCR0A   = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);
-	TCCR0A  = (1 << WGM01);  // CTC mode
-	TCCR0B  = (1 << CS01);   // Fcpu/8 speed
-}
-
-/** 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 Audio management tasks.
- */
-void EVENT_USB_Device_Disconnect(void)
-{
-	/* Stop the sample reload timer */
-	TCCR0B = 0;
-
-	/* Indicate streaming audio interface not selected */
-	StreamingAudioInterfaceSelected = false;
-
-	/* 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.
- */
-void EVENT_USB_Device_ConfigurationChanged(void)
-{
-	bool ConfigSuccess = true;
-
-	/* Setup Audio Stream Endpoint */
-	ConfigSuccess &= Endpoint_ConfigureEndpoint(AUDIO_STREAM_EPADDR, EP_TYPE_ISOCHRONOUS, AUDIO_STREAM_EPSIZE, 2);
-
-	/* Indicate endpoint configuration success or failure */
-	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
-}
-
-/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
- *  the device from the USB host before passing along unhandled control requests to the library for processing
- *  internally.
- */
-void EVENT_USB_Device_ControlRequest(void)
-{
-	/* Process General and Audio specific control requests */
-	switch (USB_ControlRequest.bRequest)
-	{
-		case REQ_SetInterface:
-			/* Set Interface is not handled by the library, as its function is application-specific */
-			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE))
-			{
-				Endpoint_ClearSETUP();
-				Endpoint_ClearStatusStage();
-
-				/* Check if the host is enabling the audio interface (setting AlternateSetting to 1) */
-				StreamingAudioInterfaceSelected = ((USB_ControlRequest.wValue) != 0);
-			}
-
-			break;
-		case AUDIO_REQ_GetStatus:
-			/* Get Status request can be directed at either the interface or endpoint, neither is currently used
-			 * according to the latest USB Audio 1.0 standard, but must be ACKed with no data when requested */
-			if ((USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) ||
-			    (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT)))
-			{
-				Endpoint_ClearSETUP();
-				Endpoint_ClearStatusStage();
-			}
-
-			break;
-		case AUDIO_REQ_SetCurrent:
-			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT))
-			{
-				/* Extract out the relevant request information to get the target Endpoint address and control being set */
-				uint8_t EndpointAddress = (uint8_t)USB_ControlRequest.wIndex;
-				uint8_t EndpointControl = (USB_ControlRequest.wValue >> 8);
-
-				/* Only handle SET CURRENT requests to the audio endpoint's sample frequency property */
-				if ((EndpointAddress == AUDIO_STREAM_EPADDR) && (EndpointControl == AUDIO_EPCONTROL_SamplingFreq))
-				{
-					uint8_t SampleRate[3];
-
-					Endpoint_ClearSETUP();
-					Endpoint_Read_Control_Stream_LE(SampleRate, sizeof(SampleRate));
-					Endpoint_ClearIN();
-
-					/* Set the new sampling frequency to the value given by the host */
-					CurrentAudioSampleFrequency = (((uint32_t)SampleRate[2] << 16) | ((uint32_t)SampleRate[1] << 8) | (uint32_t)SampleRate[0]);
-
-					/* Adjust sample reload timer to the new frequency */
-					OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);
-				}
-			}
-
-			break;
-		case AUDIO_REQ_GetCurrent:
-			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
-			{
-				/* Extract out the relevant request information to get the target Endpoint address and control being retrieved */
-				uint8_t EndpointAddress = (uint8_t)USB_ControlRequest.wIndex;
-				uint8_t EndpointControl = (USB_ControlRequest.wValue >> 8);
-
-				/* Only handle GET CURRENT requests to the audio endpoint's sample frequency property */
-				if ((EndpointAddress == AUDIO_STREAM_EPADDR) && (EndpointControl == AUDIO_EPCONTROL_SamplingFreq))
-				{
-					uint8_t SampleRate[3];
-
-					/* Convert the sampling rate value into the 24-bit format the host expects for the property */
-					SampleRate[2] = (CurrentAudioSampleFrequency >> 16);
-					SampleRate[1] = (CurrentAudioSampleFrequency >> 8);
-					SampleRate[0] = (CurrentAudioSampleFrequency &  0xFF);
-
-					Endpoint_ClearSETUP();
-					Endpoint_Write_Control_Stream_LE(SampleRate, sizeof(SampleRate));
-					Endpoint_ClearOUT();
-				}
-			}
-
-			break;
-	}
-}
-
-/** ISR to handle the reloading of the data endpoint with the next sample. */
-ISR(TIMER0_COMPA_vect, ISR_BLOCK)
-{
-	uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
-
-	/* Select the audio stream endpoint */
-	Endpoint_SelectEndpoint(AUDIO_STREAM_EPADDR);
-
-	/* Check if the current endpoint can be written to and that the audio interface is enabled */
-	if (Endpoint_IsINReady() && StreamingAudioInterfaceSelected)
-	{
-		int16_t AudioSample;
-
-		#if defined(USE_TEST_TONE)
-			static uint8_t SquareWaveSampleCount;
-			static int16_t CurrentWaveValue;
-
-			/* In test tone mode, generate a square wave at 1/256 of the sample rate */
-			if (SquareWaveSampleCount++ == 0xFF)
-			  CurrentWaveValue ^= 0x8000;
-
-			/* Only generate audio if the board button is being pressed */
-			AudioSample = (Buttons_GetStatus() & BUTTONS_BUTTON1) ? CurrentWaveValue : 0;
-		#else
-			/* Audio sample is ADC value scaled to fit the entire range */
-			AudioSample = ((SAMPLE_MAX_RANGE / ADC_MAX_RANGE) * ADC_GetResult());
-
-			#if defined(MICROPHONE_BIASED_TO_HALF_RAIL)
-			/* Microphone is biased to half rail voltage, subtract the bias from the sample value */
-			AudioSample -= (SAMPLE_MAX_RANGE / 2);
-			#endif
-		#endif
-
-		/* Write the sample to the buffer */
-		Endpoint_Write_16_LE(AudioSample);
-
-		/* Check to see if the bank is now full */
-		if (!(Endpoint_IsReadWriteAllowed()))
-		{
-			/* Send the full packet to the host */
-			Endpoint_ClearIN();
-		}
-	}
-
-	Endpoint_SelectEndpoint(PrevEndpoint);
-}
-