topic Re: usb listener / usb sniffer in LPC Microcontrollers

usb listener / usb sniffer

wut — Wed, 10 Mar 2021 08:03:28 GMT

Does anybody knows whether it is possible to sniff usb traffic with LPC43xx cpu family? In a first try I analyse that with the "LPCXpresso4367 Development Board".

So before starting I wanted to check out whether one of you has any experiences with that and could give me any inital hints.

What I want? - Sniff usb FS and HS control transfer traffic between usb device and usb host, without any affects to their communication.
Which hardware do I want to use? - LPC43xx familiy, first of all LPC4367 (LPCXpresso4367 Development Board)

Thanks for help!

Re: usb listener / usb sniffer

ZhangJennie — Wed, 24 Mar 2021 09:31:05 GMT

You can do this. But you need an external USB sinffer/analyzer. It's not possible to sniff USB without external tool.

Sure a LPCXpresso4367 is necessary.

Have a nice day,

Jun Zhang

Re: usb listener / usb sniffer

wut — Tue, 30 Mar 2021 06:09:38 GMT

Thank you for your replay!

But what do you mean with "external USB sinffer/analyzer"? Do you mean a external USB phy like "USB3500" (https://www.mouser.de/ProductDetail/microchip/usb3500-abzj/?qs=pA5MXup5wxHTF5ZKBBDtAA==&countrycode=DE&currencycode=EUR)?

So it is definitely not possible to sniff USB traffic via LPC4367 internal USB phy?

Re: usb listener / usb sniffer

ZhangJennie — Wed, 31 Mar 2021 07:16:05 GMT

No. it's not chip. It's a tool.

Search USB Sniffer or USB protocol analyzer in google, you will find many of them,