IMX28 USB Package CRC ERROR

liuxing · ‎02-03-2016

Hi All,

We encounter a very strange issue.We set up USB communication via IMX28 Host and device side.But we can see a lot of CRC errors from USB analyzer.

We analyze the error package and find the CRC value in the package is the CRC value befor final XOR.

How to debug this issue? Is there any register about the usb package CRC?

liuxing · ‎02-03-2016

Hi All,

We find that the all error packages are sent from usb device to usb host.

igorpadykov · ‎02-03-2016

Hi liu

one can look for steps of USB configuring in app note

also please try to test i.MX28 usb module using testmodes

test, generating test patterns,(attached are for i.MX6),

one can add these codes to i.MX28 obds stmp_usb.c

Lab and Test Software (1)

"IMX_OBDS : On-Board Diagnostic Suit for the i.MX28"

Best regards

igor

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