USB 2.0 Host Throughput

[lyfsci]

Hi Experts,

What is the maximum effective throughput that could be achieved in the USB 2.0 host controller for the various IMX series of processors (IMX 3/5/6) ?

Is there any test suite for EVK or respective factory profiled value for the various platforms along with its associated scenarios ?

[orangeusa]

Two tools I use for any USB firmware design.

1. There is a tool from Passmark (3rd party app - Google them) for USB 2.0 and is like a $30 hardware dongle for USB loopback and benchmark. I test directly at the PC/Mac and then through the device (if there is a hub or usb output). I have no affiliation with them, but their tool is a lot cheaper than a $30k protocol analyzer. :smileyhappy:

2. There is a tool from usb.org - USB20CV - command verifier. It sends all commands your device is supposed to handle. It's great for firmware bugs in messages not handled.

So for $30 total, you can be very confident of your firmware/layout.

.

[lyfsci]

Thank you Scott :smileyhappy:

[lyfsci]

Thank you Artur.

Regards,

Lyf

[art · Accepted solution]

The USB cores of the i.MX3/5/6 series processors are pretty similar, all of them are sertified for USB 2.0 specification. So, for most of the applications, the effective data throughput of the USB cores themselves can be estimated as 30MBytes/s.

There are no dedicated test cases for USB cores speed test, since the real data throughput depends on many factors, such as speed of device connected, software overhead etc.

Have a great day,
Artur

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