Move new Class Driver powered demos to a new ClassDriver subdirectory, re-add old low level demos to a LowLevel subdirectory.

1 files changed, 206 insertions, 0 deletions

diff --git a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
new file mode 100644
index 000000000..8c3bf6188
--- /dev/null
+++ b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
@@ -0,0 +1,206 @@
+/*

+             LUFA Library

+     Copyright (C) Dean Camera, 2009.

+              

+  dean [at] fourwalledcubicle [dot] com

+      www.fourwalledcubicle.com

+*/

+

+/*

+  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)

+

+  Permission to use, copy, modify, and distribute this software

+  and its documentation for any purpose and without fee is hereby

+  granted, 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 disclaim 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 AudioOutput demo. This file contains the main tasks of

+ *  the demo and is responsible for the initial application hardware configuration.

+ */

+

+#include "AudioOutput.h"

+

+/** LUFA Audio Class driver interface configuration and state information. This structure is

+ *  passed to all Audio Class driver functions, so that multiple instances of the same class

+ *  within a device can be differentiated from one another.

+ */

+USB_ClassInfo_Audio_t Speaker_Audio_Interface =

+	{

+		.StreamingInterfaceNumber = 1,

+

+		.DataOUTEndpointNumber    = AUDIO_STREAM_EPNUM,

+		.DataOUTEndpointSize      = AUDIO_STREAM_EPSIZE,

+	};

+

+/** 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);

+	

+	for (;;)

+	{

+		if (Speaker_Audio_Interface.InterfaceEnabled)

+		  ProcessNextSample();

+

+		USB_Audio_USBTask(&Speaker_Audio_Interface);

+		USB_USBTask();

+	}

+}

+

+/** Configures the board hardware and chip peripherals for the demo's functionality. */

+void SetupHardware(void)

+{

+	/* Disable watchdog if enabled by bootloader/fuses */

+	MCUSR &= ~(1 << WDRF);

+	wdt_disable();

+

+	/* Disable clock division */

+	clock_prescale_set(clock_div_1);

+

+	/* Hardware Initialization */

+	LEDs_Init();

+	USB_Init();

+}

+

+/** Processes the next audio sample by reading the last ADC conversion and writing it to the audio

+ *  interface, each time the sample reload timer period elapses to give a constant sample rate.

+ */

+void ProcessNextSample(void)

+{

+	if ((TIFR0 & (1 << OCF0A)) && USB_Audio_IsSampleReceived(&Speaker_Audio_Interface))

+	{

+		/* Clear the sample reload timer */

+		TIFR0 |= (1 << OCF0A);

+

+		/* Retrieve the signed 16-bit left and right audio samples */

+		int16_t LeftSample_16Bit  = (int16_t)USB_Audio_ReadSample16();

+		int16_t RightSample_16Bit = (int16_t)USB_Audio_ReadSample16();

+

+		/* Massage signed 16-bit left and right audio samples into signed 8-bit */

+		int8_t  LeftSample_8Bit   = (LeftSample_16Bit  >> 8);

+		int8_t  RightSample_8Bit  = (RightSample_16Bit >> 8);

+			

+		/* Mix the two channels together to produce a mono, 8-bit sample */

+		int8_t  MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);

+

+#if defined(AUDIO_OUT_MONO)

+		/* Load the sample into the PWM timer channel */

+		OCRxA = ((uint8_t)MixedSample_8Bit ^ (1 << 7));

+#elif defined(AUDIO_OUT_STEREO)

+		/* Load the dual 8-bit samples into the PWM timer channels */

+		OCRxA = ((uint8_t)LeftSample_8Bit  ^ (1 << 7));

+		OCRxB = ((uint8_t)RightSample_8Bit ^ (1 << 7));

+#elif defined(AUDIO_OUT_PORTC)

+		PORTC = MixedSample_8Bit;

+#else

+		uint8_t LEDMask = LEDS_NO_LEDS;

+

+		/* Make mixed sample value positive (absolute) */

+		if (MixedSample_8Bit < 0)

+		  MixedSample_8Bit = -MixedSample_8Bit;

+

+		if (MixedSample_8Bit > ((128 / 8) * 1))

+		  LEDMask |= LEDS_LED1;

+		  

+		if (MixedSample_8Bit > ((128 / 8) * 2))

+		  LEDMask |= LEDS_LED2;

+		  

+		if (MixedSample_8Bit > ((128 / 8) * 3))

+		  LEDMask |= LEDS_LED3;

+

+		if (MixedSample_8Bit > ((128 / 8) * 4))

+		  LEDMask |= LEDS_LED4;

+

+		LEDs_SetAllLEDs(LEDMask);

+#endif

+	}

+}

+

+/** Event handler for the library USB Connection event. */

+void EVENT_USB_Connect(void)

+{

+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);

+	

+	/* Sample reload timer initialization */

+	OCR0A   = (F_CPU / AUDIO_SAMPLE_FREQUENCY) - 1;

+	TCCR0A  = (1 << WGM01);  // CTC mode

+	TCCR0B  = (1 << CS00);   // Fcpu speed

+

+#if defined(AUDIO_OUT_MONO)

+	/* Set speaker as output */

+	DDRC   |= (1 << 6);

+#elif defined(AUDIO_OUT_STEREO)

+	/* Set speakers as outputs */

+	DDRC   |= ((1 << 6) | (1 << 5));

+#elif defined(AUDIO_OUT_PORTC)

+	/* Set PORTC as outputs */

+	DDRC   |= 0xFF;

+#endif

+

+#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))

+	/* PWM speaker timer initialization */

+	TCCRxA  = ((1 << WGMx0) | (1 << COMxA1) | (1 << COMxA0)

+							| (1 << COMxB1) | (1 << COMxB0)); // Set on match, clear on TOP

+	TCCRxB  = ((1 << WGMx2) | (1 << CSx0));  // Fast 8-Bit PWM, Fcpu speed

+#endif	

+}

+

+/** Event handler for the library USB Disconnection event. */

+void EVENT_USB_Disconnect(void)

+{

+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);

+

+	/* Stop the sample reload timer */

+	TCCR0B = 0;

+

+#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))

+	/* Stop the PWM generation timer */

+	TCCRxB = 0;

+#endif		

+

+#if defined(AUDIO_OUT_MONO)

+	/* Set speaker as input to reduce current draw */

+	DDRC   &= ~(1 << 6);

+#elif defined(AUDIO_OUT_STEREO)

+	/* Set speakers as inputs to reduce current draw */

+	DDRC   &= ~((1 << 6) | (1 << 5));

+#elif defined(AUDIO_OUT_PORTC)

+	/* Set PORTC low */

+	PORTC  = 0x00;

+#endif

+}

+

+/** Event handler for the library USB Configuration Changed event. */

+void EVENT_USB_ConfigurationChanged(void)

+{

+	LEDs_SetAllLEDs(LEDMASK_USB_READY);

+	

+	if (!(USB_Audio_ConfigureEndpoints(&Speaker_Audio_Interface)))

+	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);

+}

+

+/** Event handler for the library USB Unhandled Control Packet event. */

+void EVENT_USB_UnhandledControlPacket(void)

+{

+	USB_Audio_ProcessControlPacket(&Speaker_Audio_Interface);

+}