diff options
Diffstat (limited to 'Demos/Device/AudioInput/AudioInput.c')
| -rw-r--r-- | Demos/Device/AudioInput/AudioInput.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/Demos/Device/AudioInput/AudioInput.c b/Demos/Device/AudioInput/AudioInput.c deleted file mode 100644 index 93ffe0bf4..000000000 --- a/Demos/Device/AudioInput/AudioInput.c +++ /dev/null @@ -1,144 +0,0 @@ -/*
- 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);
-}
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