YOSHIHISA TABUCHI
test
Dependencies: BMI160 max32630hsp3 MemoryLCD USBDevice
Diff: Drivers/USBDevice/USBAudio/USBAudio.cpp
- Revision:
- 1:f875283d1530
- Parent:
- 0:ac4dea3e2894
- Child:
- 2:d88f88b90c8e
--- a/Drivers/USBDevice/USBAudio/USBAudio.cpp Mon Mar 18 10:21:53 2019 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,618 +0,0 @@
-/* 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::EPISO_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::EPISO_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
- (uint8_t)(LSB(channel_config_in)), // wChannelConfig
- (uint8_t)(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
- (uint8_t)(LSB(channel_config_out)), // wChannelConfig
- (uint8_t)(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
- (uint8_t)(LSB(FREQ_IN)), // tSamFreq
- (uint8_t)((FREQ_IN >> 8) & 0xff), // tSamFreq
- (uint8_t)((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
- (uint8_t)(LSB(PACKET_SIZE_ISO_IN)), // wMaxPacketSize
- (uint8_t)(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
- (uint8_t)(LSB(FREQ_OUT)), // tSamFreq
- (uint8_t)((FREQ_OUT >> 8) & 0xff), // tSamFreq
- (uint8_t)((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
- (uint8_t)(LSB(PACKET_SIZE_ISO_OUT)), // wMaxPacketSize
- (uint8_t)(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;
-}