aboutsummaryrefslogtreecommitdiffstats
path: root/lib/lufa/Demos/Device/ClassDriver/AudioInput/AudioInput.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/lufa/Demos/Device/ClassDriver/AudioInput/AudioInput.c')
-rw-r--r--lib/lufa/Demos/Device/ClassDriver/AudioInput/AudioInput.c274
1 files changed, 0 insertions, 274 deletions
diff --git a/lib/lufa/Demos/Device/ClassDriver/AudioInput/AudioInput.c b/lib/lufa/Demos/Device/ClassDriver/AudioInput/AudioInput.c
deleted file mode 100644
index 2870bcd6f..000000000
--- a/lib/lufa/Demos/Device/ClassDriver/AudioInput/AudioInput.c
+++ /dev/null
@@ -1,274 +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 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_Device_t Microphone_Audio_Interface =
- {
- .Config =
- {
- .ControlInterfaceNumber = INTERFACE_ID_AudioControl,
- .StreamingInterfaceNumber = INTERFACE_ID_AudioStream,
- .DataINEndpoint =
- {
- .Address = AUDIO_STREAM_EPADDR,
- .Size = AUDIO_STREAM_EPSIZE,
- .Banks = 2,
- },
- },
- };
-
-/** 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 (;;)
- {
- Audio_Device_USBTask(&Microphone_Audio_Interface);
- 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));
-}
-
-/** ISR to handle the reloading of the data endpoint with the next sample. */
-ISR(TIMER0_COMPA_vect, ISR_BLOCK)
-{
- uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
-
- /* Check that the USB bus is ready for the next sample to write */
- if (Audio_Device_IsReadyForNextSample(&Microphone_Audio_Interface))
- {
- 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
-
- Audio_Device_WriteSample16(&Microphone_Audio_Interface, AudioSample);
- }
-
- Endpoint_SelectEndpoint(PrevEndpoint);
-}
-
-/** Event handler for the library USB Connection event. */
-void EVENT_USB_Device_Connect(void)
-{
- 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 library USB Disconnection event. */
-void EVENT_USB_Device_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_Device_ConfigurationChanged(void)
-{
- bool ConfigSuccess = true;
-
- ConfigSuccess &= Audio_Device_ConfigureEndpoints(&Microphone_Audio_Interface);
-
- LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
-}
-
-/** Event handler for the library USB Control Request reception event. */
-void EVENT_USB_Device_ControlRequest(void)
-{
- Audio_Device_ProcessControlRequest(&Microphone_Audio_Interface);
-}
-
-/** Audio class driver callback for the setting and retrieval of streaming endpoint properties. This callback must be implemented
- * in the user application to handle property manipulations on streaming audio endpoints.
- *
- * When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for
- * the given endpoint index, and should return as fast as possible. When non-NULL, this value may be altered for GET operations
- * to indicate the size of the retrieved data.
- *
- * \note The length of the retrieved data stored into the Data buffer on GET operations should not exceed the initial value
- * of the \c DataLength parameter.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- * \param[in] EndpointProperty Property of the endpoint to get or set, a value from Audio_ClassRequests_t.
- * \param[in] EndpointAddress Address of the streaming endpoint whose property is being referenced.
- * \param[in] EndpointControl Parameter of the endpoint to get or set, a value from Audio_EndpointControls_t.
- * \param[in,out] DataLength For SET operations, the length of the parameter data to set. For GET operations, the maximum
- * length of the retrieved data. When NULL, the function should return whether the given property
- * and parameter is valid for the requested endpoint without reading or modifying the Data buffer.
- * \param[in,out] Data Pointer to a location where the parameter data is stored for SET operations, or where
- * the retrieved data is to be stored for GET operations.
- *
- * \return Boolean \c true if the property get/set was successful, \c false otherwise
- */
-bool CALLBACK_Audio_Device_GetSetEndpointProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
- const uint8_t EndpointProperty,
- const uint8_t EndpointAddress,
- const uint8_t EndpointControl,
- uint16_t* const DataLength,
- uint8_t* Data)
-{
- /* Check the requested endpoint to see if a supported endpoint is being manipulated */
- if (EndpointAddress == Microphone_Audio_Interface.Config.DataINEndpoint.Address)
- {
- /* Check the requested control to see if a supported control is being manipulated */
- if (EndpointControl == AUDIO_EPCONTROL_SamplingFreq)
- {
- switch (EndpointProperty)
- {
- case AUDIO_REQ_SetCurrent:
- /* Check if we are just testing for a valid property, or actually adjusting it */
- if (DataLength != NULL)
- {
- /* Set the new sampling frequency to the value given by the host */
- CurrentAudioSampleFrequency = (((uint32_t)Data[2] << 16) | ((uint32_t)Data[1] << 8) | (uint32_t)Data[0]);
-
- /* Adjust sample reload timer to the new frequency */
- OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);
- }
-
- return true;
- case AUDIO_REQ_GetCurrent:
- /* Check if we are just testing for a valid property, or actually reading it */
- if (DataLength != NULL)
- {
- *DataLength = 3;
-
- Data[2] = (CurrentAudioSampleFrequency >> 16);
- Data[1] = (CurrentAudioSampleFrequency >> 8);
- Data[0] = (CurrentAudioSampleFrequency & 0xFF);
- }
-
- return true;
- }
- }
- }
-
- return false;
-}
-
-/** Audio class driver callback for the setting and retrieval of streaming interface properties. This callback must be implemented
- * in the user application to handle property manipulations on streaming audio interfaces.
- *
- * When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for
- * the given entity and should return as fast as possible. When non-NULL, this value may be altered for GET operations
- * to indicate the size of the retrieved data.
- *
- * \note The length of the retrieved data stored into the Data buffer on GET operations should not exceed the initial value
- * of the \c DataLength parameter.
- *
- * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.
- * \param[in] Property Property of the interface to get or set, a value from Audio_ClassRequests_t.
- * \param[in] EntityAddress Address of the audio entity whose property is being referenced.
- * \param[in] Parameter Parameter of the entity to get or set, specific to each type of entity (see USB Audio specification).
- * \param[in,out] DataLength For SET operations, the length of the parameter data to set. For GET operations, the maximum
- * length of the retrieved data. When NULL, the function should return whether the given property
- * and parameter is valid for the requested endpoint without reading or modifying the Data buffer.
- * \param[in,out] Data Pointer to a location where the parameter data is stored for SET operations, or where
- * the retrieved data is to be stored for GET operations.
- *
- * \return Boolean \c true if the property GET/SET was successful, \c false otherwise
- */
-bool CALLBACK_Audio_Device_GetSetInterfaceProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
- const uint8_t Property,
- const uint8_t EntityAddress,
- const uint16_t Parameter,
- uint16_t* const DataLength,
- uint8_t* Data)
-{
- /* No audio interface entities in the device descriptor, thus no properties to get or set. */
- return false;
-}