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

2009-06-05 07:16:33 +00:00 · 2009-06-05 07:16:33 +00:00 · b9b03aadb2
commit b9b03aadb2
parent 6a7c298c0f
273 changed files with 46078 additions and 0 deletions
--- a/Demos/Device/ClassDriver/AudioInput/AudioInput.c
+++ b/Demos/Device/ClassDriver/AudioInput/AudioInput.c
@ -0,0 +1,144 @@
+/*
+             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 AudioInput demo. This file contains the main tasks of
+ *  the demo and is responsible for the initial application hardware configuration.
+ */
+
+#include "AudioInput.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 Microphone_Audio_Interface =
+	{
+		.StreamingInterfaceNumber = 1,
+
+		.DataINEndpointNumber     = AUDIO_STREAM_EPNUM,
+		.DataINEndpointSize       = 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 (Microphone_Audio_Interface.InterfaceEnabled)
+		  ProcessNextSample();
+
+		USB_Audio_USBTask(&Microphone_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();
+	ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
+	ADC_SetupChannel(MIC_IN_ADC_CHANNEL);
+	
+	/* Start the ADC conversion in free running mode */
+	ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | MIC_IN_ADC_CHANNEL);
+}
+
+/** 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_IsReadyForNextSample(&Microphone_Audio_Interface))
+	{
+		TIFR0 |= (1 << OCF0A);
+
+		/* Audio sample is ADC value scaled to fit the entire range */
+		int16_t 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
+
+		USB_Audio_WriteSample16(AudioSample);
+	}
+}
+
+/** 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
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Disconnect(void)
+{
+	/* Stop the sample reload timer */
+	TCCR0B = 0;
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_ConfigurationChanged(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_READY);
+	
+	if (!(USB_Audio_ConfigureEndpoints(&Microphone_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(&Microphone_Audio_Interface);
+}