topic USB CDC CDC composite Demo in MCUXpresso SDK

USB CDC CDC composite Demo

johannzimmerman — Tue, 17 Dec 2024 12:36:24 GMT

IMXRT1064 SDK_2_16

usb_device_composite_cdc_vcom_cdc_vcom Example shows the tool UsbTreeView.exe
tool displays an error: ”
----------------- Device Qualifier Descriptor -----------------
Error : ERROR_GEN_FAILURE (*!*ERROR USB 2.0 HighSpeed devices must provide a Device Qualifier Descriptor)”

The example of “usbx_device_composite_cdc_acm_cdc_acm” does not show this error.

Seems that in the first example a descriptor type is missing or?

Re: USB CDC CDC composite Demo

Pavel_Hernandez — Wed, 18 Dec 2024 20:34:39 GMT

Hello, my name is Pavel, and I will be supporting your case, I could not find the example "usb_device_composite_cdc_vcom_cdc_vcom" on the SDK v2.16, could you confirm the name of this? I find the next.

Best regards,
Pavel

Re: USB CDC CDC composite Demo

johannzimmerman — Thu, 19 Dec 2024 10:05:28 GMT

Hi Pavel, I have only specified the upper directory. I tested it with an EWARM V9.60.3. Full path is:
\SDK_2_16_000_EVK-MIMXRT1064\boards\evkmimxrt1064\usb_examples\usb_device_composite_cdc_vcom_cdc_vcom\bm\iar\dev_composite_cdc_vcom_cdc_vcom_bm.eww\dev_composite_cdc_vcom_cdc_vcom_bm.eww.
The same error occurs with the “Lite” and “FreeRTOS” variants.

Re: USB CDC CDC composite Demo

Pavel_Hernandez — Fri, 20 Dec 2024 22:08:51 GMT

Hello, thanks for your information I replayed the behavior, let me escalate to get more details about it. I want to add to the USB on the EVK does not have any certification is only for evaluation porpoise.

Best regards,
Pavel

Re: USB CDC CDC composite Demo

Pavel_Hernandez — Thu, 02 Jan 2025 23:35:46 GMT

Hello, this is the answerback: The device_qualifier_descriptor is used to illustrate the configurations that the different speed of this device, but this only needed when the configurations have difference between different speed.

For this demo, I think there is no need for this descriptor, it can work both on High speed and Full speed.

Best regards,
Pavel