Forked to make modifications to bring the USBHID into USB compliance and add additional features.
Fork of USBDevice by
As of Revision 18 everything in the USBHID specification is now implemented, except Multi-reports.
Revision comments for changelist 18
USBHID.cpp
- Added SET_PROTOCOL support
- Added GET_PROTOCOL support
- protocolSate is set to 1 by default to match USB HID specification. This variable should be checked to determine which format theinput report should have. 1 - Use the user specified report format. 0 - Use the BOOT protocol report format.
Revision comments for changelist 16
- HID_REPORT transformed from structure to class. This was done for several reasons.
- When multiple reports are used the 64 byte size for every report becomes a problem.
- The length value should always remain the same for a report, Make the constructor set the vale at the same time it allocates memory for the DATA area.
- By default the data will be an array of MAX_HID_REPORT_SIZE like the structure,
- When given a length argument, the hid_report.length will be set, and hid_report.data will be an array of the size given.
- Length zero causes data to be NULL
- Mostly backwards compatible. The definition of a destructor caused a compiler error in USBMouse::update and USBMousekeyboard::update. This error was caused by instatiation of HID_REPORT in the middle of an IF logic statement. These files have been modified. The error complained that the logic skipped object initialization. The HID_REPORT has been moved to the class definition. Since both ABSOLUTE and RELATIVE modes used the HID_REPORT, this seems to make more sense. Previously the hid_report would be instatiated in <class>::mousesend and <class>::update.
Revision comments for changelist 14
USBdevice.cpp
- Modified USB device state to change from Configure when disconnect is called.
- Modified the call back function for when the suspend state changes. This should be used to turn off peripherals to conserve power.
Revision comments for changelist 13
USBdevice.cpp
- ) Changed DEBUG messages to be more descriptive for string descriptor
- ) Bug fix: Control Transfers did not actually transfer the data from Buffer to transfer->ptr
USBHIDTypes.h
- ) Added ALL CLASS request to KEYWORD list
- ) Added KEYWORDS for report type
USBHID.h
- ) Added a new constructor to specify size of feature report
- ) Added HID_REPORT inputReport and featureReport
- ) Added data structures to support IDLE rate
- ) Added data structures to support callback functions
USBHID.cpp
- ) Changed constructor to initialize new feature data structures
- ) Implemented Set_IDLE/GET_IDLE and the periodic resend of non-changed data
- ) Implemented HID specification required control transfer GET_REPORT
- ) Fixed issue where Intreput transfers and control transfers did not access the same data structures.
- ) Implemented Feature reports
- ) Implemented Callback Hooks for get_report/set_report actions.
- ) Added callback hooks for interupt actions in the new functions.
- ) interupt transfer can now write to outputReport
- ) Modified SET_REPORT code to function for multiple types.
- ) Refactored some code in preperation to add multi report support
Test Number | Test Description | Test Result | Notes | ||||||
1 | Use USBmouse to verify backward compatibility of constructor and methods | Pass | |||||||
2 | Test SET_REPORT can set a feature report | Pass | |||||||
3 | Test GET_REPORT can retrieve a feature report | Pass | |||||||
4 | Test SET_IDLE sets up a reoccuring trigger | Pass | IOCTL_SET_POLL_FREQUENCY_MSEC does not function for the windows HID driver. A Special test program is used to rearm the IDLE rate after windows sets it to zero | ||||||
5 | Test SET_IDLE disables a trigger | Pass | Windows automatically sends this command to a HID device when it is inserted. | ||||||
6 | Enabled DEBUG in USBDevice.cpp and generated str descriptor requests. | Pass | |||||||
7 | Test SET_REPORT can set an output report | Pass | |||||||
8 | Test GET_REPORT can retrieve an output report | Pass | |||||||
9 | ReadFile, accesses the input_report | Pass | |||||||
10 | WriteFile accesses the output_report, via interupt transfer when ep1_out is used. | Pass | |||||||
11 | WriteFile accesses the output_report, via control transfer when ep1_out is NOT used. | Not Tested | |||||||
12 | Callback hooks trigger independently for each type of set_report/get_report | Pass | |||||||
13 | New constructor sets feature_report size | Pass | |||||||
14 | Control transfer SET_REPORT and writeFile access the same data structure | BUG | The same data structure is accessed, but the data transfer size is different. The writeFile strips the leading byte which is the report ID, The Control transfer keeps the byte. | ||||||
15 | Control transfer GET_REPORT and readFile access the same data structure | BUG | The same dtat structure is accessed, but the data transfer size is different. The readFile strips the leading byte which is the report ID, The Control transfer keeps the byte. | ||||||
16 | Test GET_IDLE retrieves the IDLE rate | Unknown | Windows HID driver does not implement IOCTL_HID_GET_POLL_FREQUENCY_MSEC |
USBAudio/USBAudio.cpp
- Committer:
- samux
- Date:
- 2012-07-17
- Revision:
- 1:80ab0d068708
File content as of revision 1:80ab0d068708:
/* Copyright (c) 2010-2011 mbed.org, MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software * and associated documentation files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "stdint.h" #include "USBAudio.h" #include "USBAudio_Types.h" USBAudio::USBAudio(uint32_t frequency_in, uint8_t channel_nb_in, uint32_t frequency_out, uint8_t channel_nb_out, uint16_t vendor_id, uint16_t product_id, uint16_t product_release): USBDevice(vendor_id, product_id, product_release) { mute = 0; volCur = 0x0080; volMin = 0x0000; volMax = 0x0100; volRes = 0x0004; available = false; FREQ_IN = frequency_in; FREQ_OUT = frequency_out; this->channel_nb_in = channel_nb_in; this->channel_nb_out = channel_nb_out; // stereo -> *2, mono -> *1 PACKET_SIZE_ISO_IN = (FREQ_IN / 500) * channel_nb_in; PACKET_SIZE_ISO_OUT = (FREQ_OUT / 500) * channel_nb_out; // STEREO -> left and right channel_config_in = (channel_nb_in == 1) ? CHANNEL_M : CHANNEL_L + CHANNEL_R; channel_config_out = (channel_nb_out == 1) ? CHANNEL_M : CHANNEL_L + CHANNEL_R; SOF_handler = false; buf_stream_out = NULL; buf_stream_in = NULL; interruptOUT = false; writeIN = false; interruptIN = false; available = false; volume = 0; // connect the device USBDevice::connect(); } bool USBAudio::read(uint8_t * buf) { buf_stream_in = buf; SOF_handler = false; while (!available || !SOF_handler); available = false; return true; } bool USBAudio::readNB(uint8_t * buf) { buf_stream_in = buf; SOF_handler = false; while (!SOF_handler); if (available) { available = false; buf_stream_in = NULL; return true; } return false; } bool USBAudio::readWrite(uint8_t * buf_read, uint8_t * buf_write) { buf_stream_in = buf_read; SOF_handler = false; writeIN = false; if (interruptIN) { USBDevice::writeNB(EP3IN, buf_write, PACKET_SIZE_ISO_OUT, PACKET_SIZE_ISO_OUT); } else { buf_stream_out = buf_write; } while (!available); if (interruptIN) { while (!writeIN); } while (!SOF_handler); return true; } bool USBAudio::write(uint8_t * buf) { writeIN = false; SOF_handler = false; if (interruptIN) { USBDevice::writeNB(EP3IN, buf, PACKET_SIZE_ISO_OUT, PACKET_SIZE_ISO_OUT); } else { buf_stream_out = buf; } while (!SOF_handler); if (interruptIN) { while (!writeIN); } return true; } float USBAudio::getVolume() { return (mute) ? 0.0 : volume; } bool USBAudio::EP3_OUT_callback() { uint32_t size = 0; interruptOUT = true; if (buf_stream_in != NULL) { readEP(EP3OUT, (uint8_t *)buf_stream_in, &size, PACKET_SIZE_ISO_IN); available = true; buf_stream_in = NULL; } readStart(EP3OUT, PACKET_SIZE_ISO_IN); return false; } bool USBAudio::EP3_IN_callback() { interruptIN = true; writeIN = true; return true; } // Called in ISR context on each start of frame void USBAudio::SOF(int frameNumber) { uint32_t size = 0; if (!interruptOUT) { // read the isochronous endpoint if (buf_stream_in != NULL) { if (USBDevice::readEP_NB(EP3OUT, (uint8_t *)buf_stream_in, &size, PACKET_SIZE_ISO_IN)) { if (size) { available = true; readStart(EP3OUT, PACKET_SIZE_ISO_IN); buf_stream_in = NULL; } } } } if (!interruptIN) { // write if needed if (buf_stream_out != NULL) { USBDevice::writeNB(EP3IN, (uint8_t *)buf_stream_out, PACKET_SIZE_ISO_OUT, PACKET_SIZE_ISO_OUT); buf_stream_out = NULL; } } SOF_handler = true; } // Called in ISR context // Set configuration. Return false if the configuration is not supported. bool USBAudio::USBCallback_setConfiguration(uint8_t configuration) { if (configuration != DEFAULT_CONFIGURATION) { return false; } // Configure isochronous endpoint realiseEndpoint(EP3OUT, PACKET_SIZE_ISO_IN, ISOCHRONOUS); realiseEndpoint(EP3IN, PACKET_SIZE_ISO_OUT, ISOCHRONOUS); // activate readings on this endpoint readStart(EP3OUT, PACKET_SIZE_ISO_IN); return true; } // Called in ISR context // Set alternate setting. Return false if the alternate setting is not supported bool USBAudio::USBCallback_setInterface(uint16_t interface, uint8_t alternate) { if (interface == 0 && alternate == 0) { return true; } if (interface == 1 && (alternate == 0 || alternate == 1)) { return true; } if (interface == 2 && (alternate == 0 || alternate == 1)) { return true; } return false; } // Called in ISR context // Called by USBDevice on Endpoint0 request // This is used to handle extensions to standard requests and class specific requests. // Return true if class handles this request bool USBAudio::USBCallback_request() { bool success = false; CONTROL_TRANSFER * transfer = getTransferPtr(); // Process class-specific requests if (transfer->setup.bmRequestType.Type == CLASS_TYPE) { // Feature Unit: Interface = 0, ID = 2 if (transfer->setup.wIndex == 0x0200) { // Master Channel if ((transfer->setup.wValue & 0xff) == 0) { switch (transfer->setup.wValue >> 8) { case MUTE_CONTROL: switch (transfer->setup.bRequest) { case REQUEST_GET_CUR: transfer->remaining = 1; transfer->ptr = &mute; transfer->direction = DEVICE_TO_HOST; success = true; break; case REQUEST_SET_CUR: transfer->remaining = 1; transfer->notify = true; transfer->direction = HOST_TO_DEVICE; success = true; break; default: break; } break; case VOLUME_CONTROL: switch (transfer->setup.bRequest) { case REQUEST_GET_CUR: transfer->remaining = 2; transfer->ptr = (uint8_t *)&volCur; transfer->direction = DEVICE_TO_HOST; success = true; break; case REQUEST_GET_MIN: transfer->remaining = 2; transfer->ptr = (uint8_t *)&volMin; transfer->direction = DEVICE_TO_HOST; success = true; break; case REQUEST_GET_MAX: transfer->remaining = 2; transfer->ptr = (uint8_t *)&volMax; transfer->direction = DEVICE_TO_HOST; success = true; break; case REQUEST_GET_RES: transfer->remaining = 2; transfer->ptr = (uint8_t *)&volRes; transfer->direction = DEVICE_TO_HOST; success = true; break; case REQUEST_SET_CUR: transfer->remaining = 2; transfer->notify = true; transfer->direction = HOST_TO_DEVICE; success = true; break; case REQUEST_SET_MIN: transfer->remaining = 2; transfer->notify = true; transfer->direction = HOST_TO_DEVICE; success = true; break; case REQUEST_SET_MAX: transfer->remaining = 2; transfer->notify = true; transfer->direction = HOST_TO_DEVICE; success = true; break; case REQUEST_SET_RES: transfer->remaining = 2; transfer->notify = true; transfer->direction = HOST_TO_DEVICE; success = true; break; } break; default: break; } } } } return success; } // Called in ISR context when a data OUT stage has been performed void USBAudio::USBCallback_requestCompleted(uint8_t * buf, uint32_t length) { if ((length == 1) || (length == 2)) { uint16_t data = (length == 1) ? *buf : *((uint16_t *)buf); CONTROL_TRANSFER * transfer = getTransferPtr(); switch (transfer->setup.wValue >> 8) { case MUTE_CONTROL: switch (transfer->setup.bRequest) { case REQUEST_SET_CUR: mute = data & 0xff; updateVol.call(); break; default: break; } break; case VOLUME_CONTROL: switch (transfer->setup.bRequest) { case REQUEST_SET_CUR: volCur = data; volume = (float)volCur/(float)volMax; updateVol.call(); break; default: break; } break; default: break; } } } #define TOTAL_DESCRIPTOR_LENGTH ((1 * CONFIGURATION_DESCRIPTOR_LENGTH) \ + (5 * INTERFACE_DESCRIPTOR_LENGTH) \ + (1 * CONTROL_INTERFACE_DESCRIPTOR_LENGTH + 1) \ + (2 * INPUT_TERMINAL_DESCRIPTOR_LENGTH) \ + (1 * FEATURE_UNIT_DESCRIPTOR_LENGTH) \ + (2 * OUTPUT_TERMINAL_DESCRIPTOR_LENGTH) \ + (2 * STREAMING_INTERFACE_DESCRIPTOR_LENGTH) \ + (2 * FORMAT_TYPE_I_DESCRIPTOR_LENGTH) \ + (2 * (ENDPOINT_DESCRIPTOR_LENGTH + 2)) \ + (2 * STREAMING_ENDPOINT_DESCRIPTOR_LENGTH) ) #define TOTAL_CONTROL_INTF_LENGTH (CONTROL_INTERFACE_DESCRIPTOR_LENGTH + 1 + \ 2*INPUT_TERMINAL_DESCRIPTOR_LENGTH + \ FEATURE_UNIT_DESCRIPTOR_LENGTH + \ 2*OUTPUT_TERMINAL_DESCRIPTOR_LENGTH) uint8_t * USBAudio::configurationDesc() { static uint8_t configDescriptor[] = { // Configuration 1 CONFIGURATION_DESCRIPTOR_LENGTH, // bLength CONFIGURATION_DESCRIPTOR, // bDescriptorType LSB(TOTAL_DESCRIPTOR_LENGTH), // wTotalLength (LSB) MSB(TOTAL_DESCRIPTOR_LENGTH), // wTotalLength (MSB) 0x03, // bNumInterfaces DEFAULT_CONFIGURATION, // bConfigurationValue 0x00, // iConfiguration 0x80, // bmAttributes 50, // bMaxPower // Interface 0, Alternate Setting 0, Audio Control INTERFACE_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR, // bDescriptorType 0x00, // bInterfaceNumber 0x00, // bAlternateSetting 0x00, // bNumEndpoints AUDIO_CLASS, // bInterfaceClass SUBCLASS_AUDIOCONTROL, // bInterfaceSubClass 0x00, // bInterfaceProtocol 0x00, // iInterface // Audio Control Interface CONTROL_INTERFACE_DESCRIPTOR_LENGTH + 1,// bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType CONTROL_HEADER, // bDescriptorSubtype LSB(0x0100), // bcdADC (LSB) MSB(0x0100), // bcdADC (MSB) LSB(TOTAL_CONTROL_INTF_LENGTH), // wTotalLength MSB(TOTAL_CONTROL_INTF_LENGTH), // wTotalLength 0x02, // bInCollection 0x01, // baInterfaceNr 0x02, // baInterfaceNr // Audio Input Terminal (Speaker) INPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType CONTROL_INPUT_TERMINAL, // bDescriptorSubtype 0x01, // bTerminalID LSB(TERMINAL_USB_STREAMING), // wTerminalType MSB(TERMINAL_USB_STREAMING), // wTerminalType 0x00, // bAssocTerminal channel_nb_in, // bNrChannels LSB(channel_config_in), // wChannelConfig MSB(channel_config_in), // wChannelConfig 0x00, // iChannelNames 0x00, // iTerminal // Audio Feature Unit (Speaker) FEATURE_UNIT_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType CONTROL_FEATURE_UNIT, // bDescriptorSubtype 0x02, // bUnitID 0x01, // bSourceID 0x01, // bControlSize CONTROL_MUTE | CONTROL_VOLUME, // bmaControls(0) 0x00, // bmaControls(1) 0x00, // iTerminal // Audio Output Terminal (Speaker) OUTPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType CONTROL_OUTPUT_TERMINAL, // bDescriptorSubtype 0x03, // bTerminalID LSB(TERMINAL_SPEAKER), // wTerminalType MSB(TERMINAL_SPEAKER), // wTerminalType 0x00, // bAssocTerminal 0x02, // bSourceID 0x00, // iTerminal // Audio Input Terminal (Microphone) INPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType CONTROL_INPUT_TERMINAL, // bDescriptorSubtype 0x04, // bTerminalID LSB(TERMINAL_MICROPHONE), // wTerminalType MSB(TERMINAL_MICROPHONE), // wTerminalType 0x00, // bAssocTerminal channel_nb_out, // bNrChannels LSB(channel_config_out), // wChannelConfig MSB(channel_config_out), // wChannelConfig 0x00, // iChannelNames 0x00, // iTerminal // Audio Output Terminal (Microphone) OUTPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType CONTROL_OUTPUT_TERMINAL, // bDescriptorSubtype 0x05, // bTerminalID LSB(TERMINAL_USB_STREAMING), // wTerminalType MSB(TERMINAL_USB_STREAMING), // wTerminalType 0x00, // bAssocTerminal 0x04, // bSourceID 0x00, // iTerminal // Interface 1, Alternate Setting 0, Audio Streaming - Zero Bandwith INTERFACE_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR, // bDescriptorType 0x01, // bInterfaceNumber 0x00, // bAlternateSetting 0x00, // bNumEndpoints AUDIO_CLASS, // bInterfaceClass SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass 0x00, // bInterfaceProtocol 0x00, // iInterface // Interface 1, Alternate Setting 1, Audio Streaming - Operational INTERFACE_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR, // bDescriptorType 0x01, // bInterfaceNumber 0x01, // bAlternateSetting 0x01, // bNumEndpoints AUDIO_CLASS, // bInterfaceClass SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass 0x00, // bInterfaceProtocol 0x00, // iInterface // Audio Streaming Interface STREAMING_INTERFACE_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType STREAMING_GENERAL, // bDescriptorSubtype 0x01, // bTerminalLink 0x00, // bDelay LSB(FORMAT_PCM), // wFormatTag MSB(FORMAT_PCM), // wFormatTag // Audio Type I Format FORMAT_TYPE_I_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType STREAMING_FORMAT_TYPE, // bDescriptorSubtype FORMAT_TYPE_I, // bFormatType channel_nb_in, // bNrChannels 0x02, // bSubFrameSize 16, // bBitResolution 0x01, // bSamFreqType LSB(FREQ_IN), // tSamFreq (FREQ_IN >> 8) & 0xff, // tSamFreq (FREQ_IN >> 16) & 0xff, // tSamFreq // Endpoint - Standard Descriptor ENDPOINT_DESCRIPTOR_LENGTH + 2, // bLength ENDPOINT_DESCRIPTOR, // bDescriptorType PHY_TO_DESC(EPISO_OUT), // bEndpointAddress E_ISOCHRONOUS, // bmAttributes LSB(PACKET_SIZE_ISO_IN), // wMaxPacketSize MSB(PACKET_SIZE_ISO_IN), // wMaxPacketSize 0x01, // bInterval 0x00, // bRefresh 0x00, // bSynchAddress // Endpoint - Audio Streaming STREAMING_ENDPOINT_DESCRIPTOR_LENGTH, // bLength ENDPOINT_DESCRIPTOR_TYPE, // bDescriptorType ENDPOINT_GENERAL, // bDescriptor 0x00, // bmAttributes 0x00, // bLockDelayUnits LSB(0x0000), // wLockDelay MSB(0x0000), // wLockDelay // Interface 1, Alternate Setting 0, Audio Streaming - Zero Bandwith INTERFACE_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR, // bDescriptorType 0x02, // bInterfaceNumber 0x00, // bAlternateSetting 0x00, // bNumEndpoints AUDIO_CLASS, // bInterfaceClass SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass 0x00, // bInterfaceProtocol 0x00, // iInterface // Interface 1, Alternate Setting 1, Audio Streaming - Operational INTERFACE_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR, // bDescriptorType 0x02, // bInterfaceNumber 0x01, // bAlternateSetting 0x01, // bNumEndpoints AUDIO_CLASS, // bInterfaceClass SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass 0x00, // bInterfaceProtocol 0x00, // iInterface // Audio Streaming Interface STREAMING_INTERFACE_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType SUBCLASS_AUDIOCONTROL, // bDescriptorSubtype 0x05, // bTerminalLink (output terminal microphone) 0x01, // bDelay 0x01, // wFormatTag 0x00, // wFormatTag // Audio Type I Format FORMAT_TYPE_I_DESCRIPTOR_LENGTH, // bLength INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType SUBCLASS_AUDIOSTREAMING, // bDescriptorSubtype FORMAT_TYPE_I, // bFormatType channel_nb_out, // bNrChannels 0x02, // bSubFrameSize 0x10, // bBitResolution 0x01, // bSamFreqType LSB(FREQ_OUT), // tSamFreq (FREQ_OUT >> 8) & 0xff, // tSamFreq (FREQ_OUT >> 16) & 0xff, // tSamFreq // Endpoint - Standard Descriptor ENDPOINT_DESCRIPTOR_LENGTH + 2, // bLength ENDPOINT_DESCRIPTOR, // bDescriptorType PHY_TO_DESC(EPISO_IN), // bEndpointAddress E_ISOCHRONOUS, // bmAttributes LSB(PACKET_SIZE_ISO_OUT), // wMaxPacketSize MSB(PACKET_SIZE_ISO_OUT), // wMaxPacketSize 0x01, // bInterval 0x00, // bRefresh 0x00, // bSynchAddress // Endpoint - Audio Streaming STREAMING_ENDPOINT_DESCRIPTOR_LENGTH, // bLength ENDPOINT_DESCRIPTOR_TYPE, // bDescriptorType ENDPOINT_GENERAL, // bDescriptor 0x00, // bmAttributes 0x00, // bLockDelayUnits LSB(0x0000), // wLockDelay MSB(0x0000), // wLockDelay // Terminator 0 // bLength }; return configDescriptor; } uint8_t * USBAudio::stringIinterfaceDesc() { static uint8_t stringIinterfaceDescriptor[] = { 0x0c, //bLength STRING_DESCRIPTOR, //bDescriptorType 0x03 'A',0,'u',0,'d',0,'i',0,'o',0 //bString iInterface - Audio }; return stringIinterfaceDescriptor; } uint8_t * USBAudio::stringIproductDesc() { static uint8_t stringIproductDescriptor[] = { 0x16, //bLength STRING_DESCRIPTOR, //bDescriptorType 0x03 'M',0,'b',0,'e',0,'d',0,' ',0,'A',0,'u',0,'d',0,'i',0,'o',0 //bString iProduct - Mbed Audio }; return stringIproductDescriptor; }