Posted on November 22, 2015 at 03:49I need to create UAC+CDC USB device. I have now two different projects with UAC and CDC implemented. How to organize them into composite device?
My solution now is to describe device as
0x12, /*bLength */
USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/
0x00, /*bcdUSB */
0x02,
0xEF, /*bDeviceClass*/ /* Misc class */
0x02, /*bDeviceSubClass*/ /* Common class */
0x01, /*bDeviceProtocol*/ /*IAD*/
USB_OTG_MAX_EP0_SIZE, /*bMaxPacketSize*/
LOBYTE(USBD_VID), /*idVendor*/
HIBYTE(USBD_VID), /*idVendor*/
LOBYTE(USBD_PID), /*idVendor*/
HIBYTE(USBD_PID), /*idVendor*/
0x00, /*bcdDevice rel. 2.00*/
0x02,
USBD_IDX_MFC_STR, /*Index of manufacturer string*/
USBD_IDX_PRODUCT_STR, /*Index of product string*/
USBD_IDX_SERIAL_STR, /*Index of serial number string*/
USBD_CFG_MAX_NUM /*bNumConfigurations*/
and describe interfaces with two IADs?
0x08, // bLength: Interface Descriptor size
0x0B, // bDescriptorType: IAD
0x00, // bFirstInterface
0x02, // bInterfaceCount
0x02, // bFunctionClass: CDC
0x02, // bFunctionSubClass: ACM
0x01, // bFunctionProtocol
0x01, // iFunction
for CDC and
0x08, // bLength: Interface Descriptor size
0x0B, // bDescriptorType: IAD
0x02, // bFirstInterface
0x02, // bInterfaceCount
0x01, // bFunctionClass: UAC
0x01, // bFunctionSubClass: Audio control interface
0x00, // bFunctionProtocol: Protocol undefined
0x02 // iFunction
for UAC. Is it correct?
