USB audio 如何把16位传输的描述符改成24位传输，很急！！

只看该作者 · 2018-7-12 10:15

本帖最后由 xuqingli123 于 2019-3-5 13:38 编辑

      /* USB Microphone Audio Type I Format Type Descriptor */
      0x0B+9,                            /* bLength */
      0x24,    /* bDescriptorType */
      0x02,       /* bDescriptorSubtype */
      0x01,                /* bFormatType */
      0x01,                               /* bNrChannels */
      0x02,                               /* bSubFrameSize : 2 Bytes per audio subframe */
      0x10,                               /* bBitResolution : 16 bits per sample */
      0x04,                               /* bSamFreqType */
      //B3VAL(USBD_AUDIO_FREQ),             /* tSamFreq : Audio sampling frequency coded on 3 bytes */
      B3VAL(48000),
      B3VAL(32000),
      B3VAL(16000),
      B3VAL(8000),
改成
      /* USB Microphone Audio Type I Format Type Descriptor */
      0x0B+9,                            /* bLength */
      0x24,    /* bDescriptorType */
      0x02,       /* bDescriptorSubtype */
      0x01,                /* bFormatType */
      0x01,                               /* bNrChannels */
      0x03,                               /* bSubFrameSize : 2 Bytes per audio subframe */
      0x18,                               /* bBitResolution : 16 bits per sample */
      0x04,                               /* bSamFreqType */
      //B3VAL(USBD_AUDIO_FREQ),             /* tSamFreq : Audio sampling frequency coded on 3 bytes */
      B3VAL(48000),
      B3VAL(32000),
      B3VAL(16000),
      B3VAL(8000),
除了在这个地方修改之外，还需要修改什么吗？16位的电脑能正常枚举出来，这样修改之后24位枚举出错，什么原因，求各位大佬帮帮忙，很急

只看该作者 · 2018-7-12 10:17

@zhs2007

只看该作者 · 2018-7-12 10:50

自己顶一下

只看该作者 · 2018-7-12 15:32

.....

只看该作者 · 2018-7-13 09:33

全部描述符
__ALIGN_BEGIN static uint8_t usbd_audio_CfgDesc[AUDIO_CONFIG_DESC_SIZE] __ALIGN_END =
{
/* USB Microphone Configuration Descriptor */
0x09,                               /* bLength */
0x02, /* bDescriptorType */
LOBYTE(117),    /* wTotalLength */
HIBYTE(117),
0x02,                               /* bNumInterfaces */
0x01,                               /* bConfigurationValue */
0x00,                               /* iConfiguration */
0xC0,                               /* bmAttributes : Self Powered */
0x32,                               /* bMaxPower = 100 mA*/
/* 09 byte*/
/* ---------------------------------------------------------------------------*/
/* ------------------ AudioControl Interface ------------------ */
/* USB Microphone Standard AC Interface Descriptor */
0x09,          /* bLength */
0x04,       /* bDescriptorType */
0x00,                               /* bInterfaceNumber */
0x00,                               /* bAlternateSetting */
0x00,                               /* bNumEndpoints */
0x01,             /* bInterfaceClass */
0x01,       /* bInterfaceSubClass */
0x00,          /* bInterfaceProtocol */
0x00,                               /* iInterface */
/* 09 byte*/
/* ---------------------------------------------------------------------------*/
/* USB Microphone Class-specific AC Interface Descriptor */
0x09,          /* bLength */
0x24,    /* bDescriptorType */
0x01,                /* bDescriptorSubtype */
0x00,       /* 1.00 */          /* bcdADC */
0x01,
0x29,                               /* wTotalLength */
0x00,
0x01,                               /* bInCollection */
0x01,                               /* baInterfaceNr */
/* 09 byte*/

/* USB Microphone Input Terminal Descriptor */
0x0C,    /* bLength */
0x24,    /* bDescriptorType */
0x02,       /* bDescriptorSubtype */
0x01,                         /* bTerminalID */
0x01,                               /* wTerminalType : Microphone 0x0201 */
0x02,
0x00,                               /* bAssocTerminal */
0x01,                               /* bNrChannels */
0x00,                               /* wChannelConfig : Mono sets no position bits */
0x00,
0x00,                               /* iChannelNames */
0x00,                               /* iTerminal */
/* 12 byte*/

/* USB Microphone Audio Feature Unit Descriptor */
0x08,                               /* bLength */
0x24,    /* bDescriptorType */
0x06,          /* bDescriptorSubtype */
0x02,                         /* bUnitID */
0x01,                         /* bSourceID */
0x01,                               /* bControlSize */
0x03,                               /* bmaControls(0) Mute & Volume */
0x00,                               /* ?? bmaControls(1) / iTerminal */
/* 8 byte*/

/*USB Microphone Output Terminal Descriptor */
0x09,                               /* bLength */
0x24,    /* bDescriptorType */
0x03,       /* bDescriptorSubtype */
0x03,                         /* bTerminalID */
0x01,                               /* wTerminalType : USB Streaming */
0x01,
0x00,                               /* bAssocTerminal */
0x02,                         /* bSourceID */
0x00,                               /* iTerminal */
/* 09 byte*/
/* ---------------------------------------------------------------------------*/
/* --------------- AudioStreaming Interface --------------- */
/* USB Microphone Standard AS Interface Descriptor - Audio Streaming Zero Bandwith */
/* Interface 1, Alternate Setting 0                                           */
0x09,          /* bLength */
0x04,       /* bDescriptorType */
0x01,                               /* bInterfaceNumber */
0x00,                               /* bAlternateSetting */
0x00,                               /* bNumEndpoints */
0x01,             /* bInterfaceClass */
0x02,       /* bInterfaceSubClass */
0x00,          /* bInterfaceProtocol */
0x00,                               /* iInterface */
/* 09 byte*/
/* ---------------------------------------------------------------------------*/
/* USB Microphone Standard AS Interface Descriptor - Audio Streaming Operational */
/* Interface 1, Alternate Setting 1                                        */
0x09,          /* bLength */
0x04,       /* bDescriptorType */
0x01,                               /* bInterfaceNumber */
0x01,                               /* bAlternateSetting */
0x01,                               /* bNumEndpoints */
0x01,             /* bInterfaceClass */
0x02,       /* bInterfaceSubClass */
0x00,          /* bInterfaceProtocol */
0x00,                               /* iInterface */
/* 09 byte*/

/* USB Microphone Class-specific AS General Interface Descriptor */
0x07,  /* bLength */
0x24,    /* bDescriptorType */
0x01,             /* bDescriptorSubtype */
0x03,                         /* bTerminalLink : Unit ID of the Output Terminal*/
0x01,                               /* bDelay */
0x01,                               /* wFormatTag : AUDIO_FORMAT_PCM */
0x00,
/* 07 byte*/

/* USB Microphone Audio Type I Format Type Descriptor */
0x0B,                            /* bLength */
0x24,    /* bDescriptorType */
0x02,       /* bDescriptorSubtype */
0x01,                /* bFormatType */
0x01,                               /* bNrChannels */
0x04,                               /* bSubFrameSize : 2 Bytes per audio subframe */
0x18,                               /* bBitResolution : 16 bits per sample */
0x01,                               /* bSamFreqType */
//B3VAL(USBD_AUDIO_FREQ),             /* tSamFreq : Audio sampling frequency coded on 3 bytes */
// B3VAL(48000),
B3VAL(32000),
// B3VAL(16000),
// B3VAL(8000),
/* 11+9 byte*/

/* USB Microphone Standard AS Audio Data Endpoint Descriptor */
0x09, /* bLength */
0x05,       /* bDescriptorType */
0x81,                         /* bEndpointAddress : IN endpoint 1 */
0x05,                               /* bmAttributes ¶Ëµã´«ÊäÀàÐÍ */
LOBYTE(AUDIO_IN_PACKET),             /* wMaxPacketSize */
HIBYTE(AUDIO_IN_PACKET),
0x01,                               /* bInterval : one packet per frame */
0x00,                               /* bRefresh */
0x00,                               /* bSynchAddress */
/* 09 byte*/

/* USB Microphone Class-specific Isoc. Audio Data Endpoint Descriptor */
0x07,                               /* bLength */
0x25,                               /* bDescriptorType */
0x01,                               /* bDescriptor */
0x01,                               /* bmAttributes */
0x00,                               /* bLockDelayUnits */
0x00,                               /* wLockDelay */
0x00,
/* 07 byte*/
};不知道什么地方错了  电脑枚举不出来，希望给指点一下

USB audio 如何把16位传输的描述符改成24位传输，很急！！

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