+ *
+ * | Define Name: |
+ * Location: |
+ * Description: |
+ *
+ *
+ * | AUDIO_OUT_STEREO |
+ * Makefile CDEFS |
+ * When defined, this outputs the audio samples in stereo to the timer output pins of the microcontroller. |
+ *
+ *
+ * | AUDIO_OUT_MONO |
+ * Makefile CDEFS |
+ * When defined, this outputs the audio samples in mono to the timer output pin of the microcontroller. |
+ *
+ *
+ * | AUDIO_OUT_LEDS |
+ * Makefile CDEFS |
+ * When defined, this outputs the audio samples in stereo to the board LEDs. |
+ *
+ *
+ * | AUDIO_OUT_PORTC |
+ * Makefile CDEFS |
+ * When defined, this outputs the audio samples in mono to port C of the microcontroller, for connection to an
+ * external DAC. |
+ *
+ *
+ * | AUDIO_SAMPLE_FREQUENCY |
+ * Descriptors.h |
+ * Gives the audio sample rate per channel for the audio stream, in Hz. |
+ *
+ *
+ */
diff --git a/Demos/Device/LowLevel/AudioOutput/Descriptors.c b/Demos/Device/LowLevel/AudioOutput/Descriptors.c
new file mode 100644
index 0000000000..92d7e0d57b
--- /dev/null
+++ b/Demos/Device/LowLevel/AudioOutput/Descriptors.c
@@ -0,0 +1,314 @@
+/*
+ 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
+ *
+ * USB Device Descriptors, for library use when in USB device mode. Descriptors are special
+ * computer-readable structures which the host requests upon device enumeration, to determine
+ * the device's capabilities and functions.
+ */
+
+#include "Descriptors.h"
+
+/** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
+ * device characteristics, including the supported USB version, control endpoint size and the
+ * number of device configurations. The descriptor is read out by the USB host when the enumeration
+ * process begins.
+ */
+USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+{
+ .Header = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
+
+ .USBSpecification = VERSION_BCD(02.00),
+ .Class = 0x00,
+ .SubClass = 0x00,
+ .Protocol = 0x00,
+
+ .Endpoint0Size = FIXED_CONTROL_ENDPOINT_SIZE,
+
+ .VendorID = 0x03EB,
+ .ProductID = 0x2046,
+ .ReleaseNumber = 0x0000,
+
+ .ManufacturerStrIndex = 0x01,
+ .ProductStrIndex = 0x02,
+ .SerialNumStrIndex = NO_DESCRIPTOR,
+
+ .NumberOfConfigurations = 1
+};
+
+/** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
+ * of the device in one of its supported configurations, including information about any device interfaces
+ * and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
+ * a configuration so that the host may correctly communicate with the USB device.
+ */
+USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+{
+ .Config =
+ {
+ .Header = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
+
+ .TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
+ .TotalInterfaces = 2,
+
+ .ConfigurationNumber = 1,
+ .ConfigurationStrIndex = NO_DESCRIPTOR,
+
+ .ConfigAttributes = (USB_CONFIG_ATTR_BUSPOWERED | USB_CONFIG_ATTR_SELFPOWERED),
+
+ .MaxPowerConsumption = USB_CONFIG_POWER_MA(100)
+ },
+
+ .AudioControlInterface =
+ {
+ .Header = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+ .InterfaceNumber = 0,
+ .AlternateSetting = 0,
+
+ .TotalEndpoints = 0,
+
+ .Class = 0x01,
+ .SubClass = 0x01,
+ .Protocol = 0x00,
+
+ .InterfaceStrIndex = NO_DESCRIPTOR
+ },
+
+ .AudioControlInterface_SPC =
+ {
+ .Header = {.Size = sizeof(USB_AudioInterface_AC_t), .Type = DTYPE_AudioInterface},
+ .Subtype = DSUBTYPE_Header,
+
+ .ACSpecification = VERSION_BCD(01.00),
+ .TotalLength = (sizeof(USB_AudioInterface_AC_t) +
+ sizeof(USB_AudioInputTerminal_t) +
+ sizeof(USB_AudioOutputTerminal_t)),
+
+ .InCollection = 1,
+ .InterfaceNumbers = {1},
+ },
+
+ .InputTerminal =
+ {
+ .Header = {.Size = sizeof(USB_AudioInputTerminal_t), .Type = DTYPE_AudioInterface},
+ .Subtype = DSUBTYPE_InputTerminal,
+
+ .TerminalID = 0x01,
+ .TerminalType = TERMINAL_STREAMING,
+ .AssociatedOutputTerminal = 0x00,
+
+ .TotalChannels = 2,
+ .ChannelConfig = (CHANNEL_LEFT_FRONT | CHANNEL_RIGHT_FRONT),
+
+ .ChannelStrIndex = NO_DESCRIPTOR,
+ .TerminalStrIndex = NO_DESCRIPTOR
+ },
+
+ .OutputTerminal =
+ {
+ .Header = {.Size = sizeof(USB_AudioOutputTerminal_t), .Type = DTYPE_AudioInterface},
+ .Subtype = DSUBTYPE_OutputTerminal,
+
+ .TerminalID = 0x02,
+ .TerminalType = TERMINAL_OUT_SPEAKER,
+ .AssociatedInputTerminal = 0x00,
+
+ .SourceID = 0x01,
+
+ .TerminalStrIndex = NO_DESCRIPTOR
+ },
+
+ .AudioStreamInterface_Alt0 =
+ {
+ .Header = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+ .InterfaceNumber = 1,
+ .AlternateSetting = 0,
+
+ .TotalEndpoints = 0,
+
+ .Class = 0x01,
+ .SubClass = 0x02,
+ .Protocol = 0x00,
+
+ .InterfaceStrIndex = NO_DESCRIPTOR
+ },
+
+ .AudioStreamInterface_Alt1 =
+ {
+ .Header = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+ .InterfaceNumber = 1,
+ .AlternateSetting = 1,
+
+ .TotalEndpoints = 1,
+
+ .Class = 0x01,
+ .SubClass = 0x02,
+ .Protocol = 0x00,
+
+ .InterfaceStrIndex = NO_DESCRIPTOR
+ },
+
+ .AudioStreamInterface_SPC =
+ {
+ .Header = {.Size = sizeof(USB_AudioInterface_AS_t), .Type = DTYPE_AudioInterface},
+ .Subtype = DSUBTYPE_General,
+
+ .TerminalLink = 0x01,
+
+ .FrameDelay = 1,
+ .AudioFormat = 0x0001
+ },
+
+ .AudioFormat =
+ {
+ .Header = {.Size = sizeof(USB_AudioFormat_t), .Type = DTYPE_AudioInterface},
+ .Subtype = DSUBTYPE_Format,
+
+ .FormatType = 0x01,
+ .Channels = 0x02,
+
+ .SubFrameSize = 0x02,
+ .BitResolution = 16,
+
+ .SampleFrequencyType = (sizeof(ConfigurationDescriptor.AudioFormat.SampleFrequencies) / sizeof(AudioSampleFreq_t)),
+ .SampleFrequencies = {SAMPLE_FREQ(AUDIO_SAMPLE_FREQUENCY)}
+ },
+
+ .AudioEndpoint =
+ {
+ .Endpoint =
+ {
+ .Header = {.Size = sizeof(USB_AudioStreamEndpoint_Std_t), .Type = DTYPE_Endpoint},
+
+ .EndpointAddress = (ENDPOINT_DESCRIPTOR_DIR_OUT | AUDIO_STREAM_EPNUM),
+ .Attributes = (EP_TYPE_ISOCHRONOUS | ENDPOINT_ATTR_SYNC | ENDPOINT_USAGE_DATA),
+ .EndpointSize = AUDIO_STREAM_EPSIZE,
+ .PollingIntervalMS = 1
+ },
+
+ .Refresh = 0,
+ .SyncEndpointNumber = 0
+ },
+
+ .AudioEndpoint_SPC =
+ {
+ .Header = {.Size = sizeof(USB_AudioStreamEndpoint_Spc_t), .Type = DTYPE_AudioEndpoint},
+ .Subtype = DSUBTYPE_General,
+
+ .Attributes = EP_ACCEPTS_SMALL_PACKETS,
+
+ .LockDelayUnits = 0x00,
+ .LockDelay = 0x0000
+ }
+};
+
+/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
+ * the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
+ * via the language ID table available at USB.org what languages the device supports for its string descriptors.
+ */
+USB_Descriptor_String_t PROGMEM LanguageString =
+{
+ .Header = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
+
+ .UnicodeString = {LANGUAGE_ID_ENG}
+};
+
+/** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
+ * form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
+ * Descriptor.
+ */
+USB_Descriptor_String_t PROGMEM ManufacturerString =
+{
+ .Header = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
+
+ .UnicodeString = L"Dean Camera"
+};
+
+/** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
+ * and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
+ * Descriptor.
+ */
+USB_Descriptor_String_t PROGMEM ProductString =
+{
+ .Header = {.Size = USB_STRING_LEN(19), .Type = DTYPE_String},
+
+ .UnicodeString = L"LUFA Audio Out Demo"
+};
+
+/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
+ * documentation) by the application code so that the address and size of a requested descriptor can be given
+ * to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
+ * is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
+ * USB host.
+ */
+uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)
+{
+ const uint8_t DescriptorType = (wValue >> 8);
+ const uint8_t DescriptorNumber = (wValue & 0xFF);
+
+ void* Address = NULL;
+ uint16_t Size = NO_DESCRIPTOR;
+
+ switch (DescriptorType)
+ {
+ case DTYPE_Device:
+ Address = (void*)&DeviceDescriptor;
+ Size = sizeof(USB_Descriptor_Device_t);
+ break;
+ case DTYPE_Configuration:
+ Address = (void*)&ConfigurationDescriptor;
+ Size = sizeof(USB_Descriptor_Configuration_t);
+ break;
+ case DTYPE_String:
+ switch (DescriptorNumber)
+ {
+ case 0x00:
+ Address = (void*)&LanguageString;
+ Size = pgm_read_byte(&LanguageString.Header.Size);
+ break;
+ case 0x01:
+ Address = (void*)&ManufacturerString;
+ Size = pgm_read_byte(&ManufacturerString.Header.Size);
+ break;
+ case 0x02:
+ Address = (void*)&ProductString;
+ Size = pgm_read_byte(&ProductString.Header.Size);
+ break;
+ }
+
+ break;
+ }
+
+ *DescriptorAddress = Address;
+ return Size;
+}
diff --git a/Demos/Device/LowLevel/AudioOutput/Descriptors.h b/Demos/Device/LowLevel/AudioOutput/Descriptors.h
new file mode 100644
index 0000000000..e1145717e3
--- /dev/null
+++ b/Demos/Device/LowLevel/AudioOutput/Descriptors.h
@@ -0,0 +1,322 @@
+/*
+ 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
+ *
+ * Header file for Descriptors.c.
+ */
+
+#ifndef _DESCRIPTORS_H_
+#define _DESCRIPTORS_H_
+
+ /* Includes: */
+ #include