有那位做过USB 音频输出的？可知道能否配置成直接通过USB输出压缩文件？
想先写一个声音输出的，花了老长时间写了下面一个描述符，一运行就会死机，请高手指点.
code const complete_configuration ConfigDesc =
{
{ // Standard configuration descriptor 配置 ：三个interfaces
0x09, // bLength (9)
0x02, // bDescriptorType (CONFIGURATION)
0x7100, // wTotallength (145) // 0x71
0x02, // bNumInterfaces (3) //0x02
0x01, // bConfigurationValue (1)
0x00, // iConfiguration (none)
0x80, // bmAttributes (bus-powered)
0x32, // bMaxPower (100 mA)
},
{ /* Audio control interface 音频控制 接口描述符 */
0x09, // bLength (9)
0x04, // bDescriptorType (INTERFACE)
0x00, // bInterfaceNumber (0)
0x00, // bAlternateSetting (none)
0x00, // bNumEndpoints (none)
0x01, // bInterfaceClass (AUDIO)
0x01, // bInterfaceSubClass (AUDIO_CONTROL)
0x00, // bInterfaceProtocol (none)
0x00 // iInterface (none)
},
// -----------------------------------------------------------------------------------------
{ /* Audio class-specific interface header 音频控制类说明 */
0x09, // bLength (9)
0x24, // bDescriptorType (CS_INTERFACE) ----------------------- cs_interface
0x01, // bDescriptorSubtype (HEADER) ------header
0x0001, // bcdADC (1.0)
0x2B00, // wTotalLength (43)
0x01, // bInCollection (1 streaming interface)
0x01 // baInterfaceNr (interface 1 is stream)
},
{ // Audio class-specific output terminal
0x09, // bLength (9)
0x24, // bDescriptorType (CS_INTERFACE)
0x03, // bDescriptorSubtype (OUTPUT_TERMINAL) ----- output terminal
0x01, // bTerminalID (3) // 3 //
0x0101, // wTerminalType (USB streaming)
0x00, // bAssocTerminal (none)
0x02, // bSourceID (feature unit 2)
0x00 // iTerminal (none)
},
{ // Audio class-specific feature unit
0x0D, // bLength (13)
0x24, // bDescriptorType (CS_INTERFACE)
0x06, // bDescriptorSubtype (FEATURE_UNIT) ------feature unit
0x02, // bUnitID (2)
0x01, // bSourceID (input terminal 1)
0x02, // bControlSize (2 bytes)
0x0100, // Master controls
0x0000, // Channel 0 controls
0x0000, // Channel 1 controls
0x00 // iFeature (none)
},
{ // Audio class-specific input terminal
0x0C, // bLength (12)
0x24, // bDescriptorType (CS_INTERFACE)
0x02, // bDescriptorSubtype (INPUT_TERMINAL) -----input terminal // 02 //
0x03, // bTerminalID (1)
0x1007, // wTerminalType (radio receiver) // 1007 //
0x00, // bAssocTerminal (none)
0x02, // bNrChannels (2)
0x0300, // wChannelConfig (left, right)
0x00, // iChannelNames (none)
0x00 // iTerminal (none)
},
// -----------------------------------------------------------------------------------------
{ /* Audio zero-bandwidth interface */
0x09, // bLength (9)
0x04, // bDescriptorType (INTERFACE)
0x01, // bInterfaceNumber (1)
0x00, // bAlternateSetting (0)
0x00, // bNumEndpoints (0)
0x01, // bInterfaceClass (AUDIO)
0x02, // bInterfaceSubClass (AUDIO_STREAMING)
0x00, // bInterfaceProtocol (none)
0x00 // iInterface (none)
},
{ // Audio streaming interface (alternate)
0x09, // bLength (9)
0x04, // bDescriptorType (INTERFACE)
0x01, // bInterfaceNumber (1)
0x01, // bAlternateSetting (1)
0x01, // bNumEndpoints (1)
0x01, // bInterfaceClass (AUDIO)
0x02, // bInterfaceSubClass (AUDIO_STREAMING)
0x00, // bInterfaceProtocol (none)
0x00 // iInterface (none)
},
{ // Audio class-specific stream interface --------------- AS interface descriptor
0x07, // bLength (7)
0x24, // bDescriptorType (CS_INTERFACE)
0x01, // bDescriptorSubtype (AS_GENERAL) ---- as general
0x03, // bTerminalLink (terminal 3)
0x00, // bDelay (none)
0x0100 // wFormatTag (PCM format)
},
{ // Audio class-specific type I format
0x0B, // bLength (11)
0x24, // bDescriptorType (CS_INTERFACE)
0x02, // bDescriptorSubtype (FORMAT_TYPE) ---- for type
0x01, // bFormatType (TYPE_I)
0x02, // bNrChannels (2)
0x02, // bSubFrameSize (2)
// The next field should be 10, but 16 works with more standard software
0x10, // bBitResolution (16)
0x01, // bSamFreqType (1 sampling frequency)
0x80, // 48,000 Hz (byte 0)
0xBB, // 48,000 Hz (byte 1)
0x00 // 48,000 Hz (byte 2)
},
{ // Audio streaming isochronous endpoint
0x09, // bLength (9)
0x05, // bDescriptorType (ENDPOINT)
0x03, // bEndpointAddress (EP3 in) //83//
0x05, // bmAttributes (asynchronous)
0x0002, // wMaxPacketSize (512)
0x01, // bInterval (1 millisecond)
0x00, // bRefresh (0)
0x00 // bSynchAddress (no synchronization)
},
{ // Audio isochronous endpoint
0x07, // bLength (7)
0x25, // bDescriptorType (CS_ENDPOINT)
0x01, // bDescriptorSubtype (EP_GENERAL)
0x00, // bmAttributes (none)
0x02, // bLockDelayUnits (PCM samples)
0x0000 // wLockDelay (0)
}
}; // End of ConfigDesc
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