USB on MIMXRT1176

ahmedhrabi — Tue, 31 Jan 2023 11:58:36 GMT

Hi,

I'am working on USB on the MIMXRT1176 and i have some questions:

1- I tested CDC class VCOM, but the speed seems to be slow for my usage (~300 KB/s), am i looping something to speed up the transfer? I tested the MSC class and the transfer speed reached about 5MB/s, i don't understand why i can't reach such speed on CDC class.

2- For the CDC VNIC SDK example project, there's no lwip stack, how can i test transfer (file or data) with this example for the RNDIS class ?

3- Is there a specific recommended class to reach high speed transfer on USB ?

Regards.

Re: USB on MIMXRT1176

EdwinHz — Wed, 08 Feb 2023 20:54:35 GMT

Hi @ahmedhrabi,

MSC is expected to be faster by definition. CDC often contains much more back and forth and setup data than MSC.

The lwip stack can be found on our lwip examples on the SDK.

BR,

Edwin.

topic USB on MIMXRT1176 in i.MX RT Crossover MCUs

USB on MIMXRT1176

Re: USB on MIMXRT1176