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IN/OUT streaming interfaces.

Could you help teach me, how to add a microphone input to this usb audio code.

MCB1700 Sample Code Bundle for LPC17xx Peripherals using Keil's MDK-ARM V2.00 (Jan 10, 2011)
ics.nxp.com/.../mcb1700.code.bundle.lpc17xx.keil.zip

Could we start with the usbuser.c file and the changes that must be made,

thankyou.

Parents

0 Josh Simons over 13 years ago in reply to Josh Simons

/* Interface 1, Alternate Setting 1, Audio Streaming - Operational */
  USB_INTERFACE_DESC_SIZE,              /* bLength */
  USB_INTERFACE_DESCRIPTOR_TYPE,        /* bDescriptorType */
  0x01,                                 /* bInterfaceNumber */
  0x01,                                 /* bAlternateSetting */
  0x01,                                 /* bNumEndpoints */
  USB_DEVICE_CLASS_AUDIO,               /* bInterfaceClass */
  AUDIO_SUBCLASS_AUDIOSTREAMING,        /* bInterfaceSubClass */
  AUDIO_PROTOCOL_UNDEFINED,             /* bInterfaceProtocol */
  0x00,                                 /* iInterface */
/* Audio Streaming Interface */
  AUDIO_STREAMING_INTERFACE_DESC_SIZE,  /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_STREAMING_GENERAL,              /* bDescriptorSubtype */
  0x01,                                 /* bTerminalLink */
  0x00,                                 /* bDelay */
  WBVAL(AUDIO_FORMAT_PCM),              /* wFormatTag */
/* Audio Type I Format */
  AUDIO_FORMAT_TYPE_I_DESC_SZ(1),       /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_STREAMING_FORMAT_TYPE,          /* bDescriptorSubtype */
  AUDIO_FORMAT_TYPE_I,                  /* bFormatType */
  0x01,                                 /* bNrChannels */
  0x02,                                 /* bSubFrameSize */
  16,                                   /* bBitResolution */
  0x01,                                 /* bSamFreqType */
  B3VAL(32000),                         /* tSamFreq */
  /* Endpoint - Standard Descriptor */
  AUDIO_STANDARD_ENDPOINT_DESC_SIZE,    /* bLength */
  USB_ENDPOINT_DESCRIPTOR_TYPE,         /* bDescriptorType */
  USB_ENDPOINT_OUT(3),                  /* bEndpointAddress */
  USB_ENDPOINT_TYPE_ISOCHRONOUS,         /* bmAttributes */
  WBVAL(66),                            /* wMaxPacketSize */
  0x01,                                 /* bInterval */
  0x00,                                 /* bRefresh */
  0x00,                                 /* bSynchAddress */
/* Endpoint - Audio Streaming */
  AUDIO_STREAMING_ENDPOINT_DESC_SIZE,   /* bLength */
  AUDIO_ENDPOINT_DESCRIPTOR_TYPE,       /* bDescriptorType */
  AUDIO_ENDPOINT_GENERAL,               /* bDescriptor */
  0x00,                                 /* bmAttributes */
  0x00,                                 /* bLockDelayUnits */
  WBVAL(0x0000),                        /* wLockDelay */

  /* Interface 1, Alternate Setting 0, Audio Streaming - Zero Bandwith
  USB_INTERFACE_DESC_SIZE,              /* bLength */
  USB_INTERFACE_DESCRIPTOR_TYPE,        /* bDescriptorType */
  0x02,                                 /* bInterfaceNumber */
  0x00,                                 /* bAlternateSetting */
  0x00,                                 /* bNumEndpoints */
  USB_DEVICE_CLASS_AUDIO,               /* bInterfaceClass */
  AUDIO_SUBCLASS_AUDIOSTREAMING,        /* bInterfaceSubClass */
  AUDIO_PROTOCOL_UNDEFINED,             /* bInterfaceProtocol */
  0x00,                                 /* iInterface */
  /* Interface 1, Alternate Setting 1, Audio Streaming - Operational
  USB_INTERFACE_DESC_SIZE,              /* bLength */
  USB_INTERFACE_DESCRIPTOR_TYPE,        /* bDescriptorType */
  0x02,                                 /* bInterfaceNumber */
  0x01,                                 /* bAlternateSetting */
  0x01,                                 /* bNumEndpoints */
  USB_DEVICE_CLASS_AUDIO,               /* bInterfaceClass */
  AUDIO_SUBCLASS_AUDIOSTREAMING,        /* bInterfaceSubClass */
  AUDIO_PROTOCOL_UNDEFINED,             /* bInterfaceProtocol */
  0x00,                                 /* iInterface */
  /* Audio Streaming Interface */
  AUDIO_STREAMING_INTERFACE_DESC_SIZE,  /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_SUBCLASS_AUDIOCONTROL,          /* bDescriptorSubtype */
  0x05,                                 /* bTerminalLink */      (output terminal microphone)
  0x01,                                 /* bDelay */
  WBVAL(AUDIO_FORMAT_PCM),              /* wFormatTag */
  /* Audio Type I Format */
  AUDIO_FORMAT_TYPE_I_DESC_SZ(1),       /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_SUBCLASS_AUDIOSTREAMING ,          /* bDescriptorSubtype */
  AUDIO_FORMAT_TYPE_I,                  /* bFormatType */
  0x01,                                 /* bNrChannels */
  0x02,                                 /* bSubFrameSize */
  16,                                   /* bBitResolution */
  0x01,                                 /* bSamFreqType */
  B3VAL(32000),                         /* tSamFreq */
  /* Endpoint - Standard Descriptor */
  AUDIO_STANDARD_ENDPOINT_DESC_SIZE,    /* bLength */
  USB_ENDPOINT_DESCRIPTOR_TYPE,         /* bDescriptorType */
  USB_ENDPOINT_IN(3),                  /* bEndpointAddress */
  USB_ENDPOINT_TYPE_ISOCHRONOUS,         /* bmAttributes */
  WBVAL(66),                            /* wMaxPacketSize */
  0x01,                                 /* bInterval */
  0x00,                                 /* bRefresh */
  0x00,                                 /* bSynchAddress */
  /* Endpoint - Audio Streaming */
  AUDIO_STREAMING_ENDPOINT_DESC_SIZE,   /* bLength */
  AUDIO_ENDPOINT_DESCRIPTOR_TYPE,       /* bDescriptorType */
  AUDIO_ENDPOINT_GENERAL,               /* bDescriptor */
  0x00,                                 /* bmAttributes */
  0x00,                                 /* bLockDelayUnits */
  WBVAL(0x0000),                        /* wLockDelay */

/* Terminator */
  0                                     /* bLength */
};

/* USB String Descriptor (optional) */
const uint8_t USB_StringDescriptor[] = {
/* Index 0x00: LANGID Codes */
  0x04,                              /* bLength */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  WBVAL(0x0409), /* US English */    /* wLANGID */
/* Index 0x01: Manufacturer */
  (13*2 + 2),                        /* bLength (13 Char + Type + lenght) */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  'N',0,
  'X',0,
  'P',0,
  ' ',0,
  'S',0,
  'e',0,
  'm',0,
  'i',0,
  'c',0,
  'o',0,
  'n',0,
  'd',0,
  ' ',0,
/* Index 0x02: Product */
  (20*2 + 2),                        /* bLength ( 20 Char + Type + lenght) */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  'N',0,
  'X',0,
  'P',0,
  ' ',0,
  'L',0,
  'P',0,
  'C',0,
  '1',0,
  '7',0,
  'x',0,
  'x',0,
  ' ',0,
  'S',0,
  'p',0,
  'e',0,
  'a',0,
  'k',0,
  'e',0,
  'r',0,
  ' ',0,
/* Index 0x03: Serial Number */
  (12*2 + 2),                        /* bLength (12 Char + Type + lenght) */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  'D',0,
  'E',0,
  'M',0,
  'O',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
};

Reply

0 Josh Simons over 13 years ago in reply to Josh Simons

/* Interface 1, Alternate Setting 1, Audio Streaming - Operational */
  USB_INTERFACE_DESC_SIZE,              /* bLength */
  USB_INTERFACE_DESCRIPTOR_TYPE,        /* bDescriptorType */
  0x01,                                 /* bInterfaceNumber */
  0x01,                                 /* bAlternateSetting */
  0x01,                                 /* bNumEndpoints */
  USB_DEVICE_CLASS_AUDIO,               /* bInterfaceClass */
  AUDIO_SUBCLASS_AUDIOSTREAMING,        /* bInterfaceSubClass */
  AUDIO_PROTOCOL_UNDEFINED,             /* bInterfaceProtocol */
  0x00,                                 /* iInterface */
/* Audio Streaming Interface */
  AUDIO_STREAMING_INTERFACE_DESC_SIZE,  /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_STREAMING_GENERAL,              /* bDescriptorSubtype */
  0x01,                                 /* bTerminalLink */
  0x00,                                 /* bDelay */
  WBVAL(AUDIO_FORMAT_PCM),              /* wFormatTag */
/* Audio Type I Format */
  AUDIO_FORMAT_TYPE_I_DESC_SZ(1),       /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_STREAMING_FORMAT_TYPE,          /* bDescriptorSubtype */
  AUDIO_FORMAT_TYPE_I,                  /* bFormatType */
  0x01,                                 /* bNrChannels */
  0x02,                                 /* bSubFrameSize */
  16,                                   /* bBitResolution */
  0x01,                                 /* bSamFreqType */
  B3VAL(32000),                         /* tSamFreq */
  /* Endpoint - Standard Descriptor */
  AUDIO_STANDARD_ENDPOINT_DESC_SIZE,    /* bLength */
  USB_ENDPOINT_DESCRIPTOR_TYPE,         /* bDescriptorType */
  USB_ENDPOINT_OUT(3),                  /* bEndpointAddress */
  USB_ENDPOINT_TYPE_ISOCHRONOUS,         /* bmAttributes */
  WBVAL(66),                            /* wMaxPacketSize */
  0x01,                                 /* bInterval */
  0x00,                                 /* bRefresh */
  0x00,                                 /* bSynchAddress */
/* Endpoint - Audio Streaming */
  AUDIO_STREAMING_ENDPOINT_DESC_SIZE,   /* bLength */
  AUDIO_ENDPOINT_DESCRIPTOR_TYPE,       /* bDescriptorType */
  AUDIO_ENDPOINT_GENERAL,               /* bDescriptor */
  0x00,                                 /* bmAttributes */
  0x00,                                 /* bLockDelayUnits */
  WBVAL(0x0000),                        /* wLockDelay */

  /* Interface 1, Alternate Setting 0, Audio Streaming - Zero Bandwith
  USB_INTERFACE_DESC_SIZE,              /* bLength */
  USB_INTERFACE_DESCRIPTOR_TYPE,        /* bDescriptorType */
  0x02,                                 /* bInterfaceNumber */
  0x00,                                 /* bAlternateSetting */
  0x00,                                 /* bNumEndpoints */
  USB_DEVICE_CLASS_AUDIO,               /* bInterfaceClass */
  AUDIO_SUBCLASS_AUDIOSTREAMING,        /* bInterfaceSubClass */
  AUDIO_PROTOCOL_UNDEFINED,             /* bInterfaceProtocol */
  0x00,                                 /* iInterface */
  /* Interface 1, Alternate Setting 1, Audio Streaming - Operational
  USB_INTERFACE_DESC_SIZE,              /* bLength */
  USB_INTERFACE_DESCRIPTOR_TYPE,        /* bDescriptorType */
  0x02,                                 /* bInterfaceNumber */
  0x01,                                 /* bAlternateSetting */
  0x01,                                 /* bNumEndpoints */
  USB_DEVICE_CLASS_AUDIO,               /* bInterfaceClass */
  AUDIO_SUBCLASS_AUDIOSTREAMING,        /* bInterfaceSubClass */
  AUDIO_PROTOCOL_UNDEFINED,             /* bInterfaceProtocol */
  0x00,                                 /* iInterface */
  /* Audio Streaming Interface */
  AUDIO_STREAMING_INTERFACE_DESC_SIZE,  /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_SUBCLASS_AUDIOCONTROL,          /* bDescriptorSubtype */
  0x05,                                 /* bTerminalLink */      (output terminal microphone)
  0x01,                                 /* bDelay */
  WBVAL(AUDIO_FORMAT_PCM),              /* wFormatTag */
  /* Audio Type I Format */
  AUDIO_FORMAT_TYPE_I_DESC_SZ(1),       /* bLength */
  AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
  AUDIO_SUBCLASS_AUDIOSTREAMING ,          /* bDescriptorSubtype */
  AUDIO_FORMAT_TYPE_I,                  /* bFormatType */
  0x01,                                 /* bNrChannels */
  0x02,                                 /* bSubFrameSize */
  16,                                   /* bBitResolution */
  0x01,                                 /* bSamFreqType */
  B3VAL(32000),                         /* tSamFreq */
  /* Endpoint - Standard Descriptor */
  AUDIO_STANDARD_ENDPOINT_DESC_SIZE,    /* bLength */
  USB_ENDPOINT_DESCRIPTOR_TYPE,         /* bDescriptorType */
  USB_ENDPOINT_IN(3),                  /* bEndpointAddress */
  USB_ENDPOINT_TYPE_ISOCHRONOUS,         /* bmAttributes */
  WBVAL(66),                            /* wMaxPacketSize */
  0x01,                                 /* bInterval */
  0x00,                                 /* bRefresh */
  0x00,                                 /* bSynchAddress */
  /* Endpoint - Audio Streaming */
  AUDIO_STREAMING_ENDPOINT_DESC_SIZE,   /* bLength */
  AUDIO_ENDPOINT_DESCRIPTOR_TYPE,       /* bDescriptorType */
  AUDIO_ENDPOINT_GENERAL,               /* bDescriptor */
  0x00,                                 /* bmAttributes */
  0x00,                                 /* bLockDelayUnits */
  WBVAL(0x0000),                        /* wLockDelay */

/* Terminator */
  0                                     /* bLength */
};

/* USB String Descriptor (optional) */
const uint8_t USB_StringDescriptor[] = {
/* Index 0x00: LANGID Codes */
  0x04,                              /* bLength */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  WBVAL(0x0409), /* US English */    /* wLANGID */
/* Index 0x01: Manufacturer */
  (13*2 + 2),                        /* bLength (13 Char + Type + lenght) */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  'N',0,
  'X',0,
  'P',0,
  ' ',0,
  'S',0,
  'e',0,
  'm',0,
  'i',0,
  'c',0,
  'o',0,
  'n',0,
  'd',0,
  ' ',0,
/* Index 0x02: Product */
  (20*2 + 2),                        /* bLength ( 20 Char + Type + lenght) */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  'N',0,
  'X',0,
  'P',0,
  ' ',0,
  'L',0,
  'P',0,
  'C',0,
  '1',0,
  '7',0,
  'x',0,
  'x',0,
  ' ',0,
  'S',0,
  'p',0,
  'e',0,
  'a',0,
  'k',0,
  'e',0,
  'r',0,
  ' ',0,
/* Index 0x03: Serial Number */
  (12*2 + 2),                        /* bLength (12 Char + Type + lenght) */
  USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
  'D',0,
  'E',0,
  'M',0,
  'O',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
  '0',0,
};

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