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ufrisk / pcileech

Direct Memory Access (DMA) Attack Software
GNU Affero General Public License v3.0
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FTDI device reconnects randomly #221

Closed mylylyl closed 1 year ago

mylylyl commented 1 year ago

Had this weird issue happening for some time. The FTDI FT601 USB Device will randomly disconnect and reconnect, and pcileech will get DEVICE: FPGA: ERROR: Unable to connect to USB/FT601 device [0,v0.0,0000] error. Seems the only solution is to restart target system.

ufrisk commented 1 year ago

Hi,

I've noticed this as well some times on some hardware that the USB reconnects. I never was able to pinpoint the issue. I think it may have to do with excessive heat on the FTDI chip, the errors were reduced when putting a small heat sink on it on my ScreamerM2. On other hardware I never had any issues with it though so I'm not sure this would be the issue.

Also in firmware v4.11 I made some fixes with regards to the USB, that wouldn't exactly help against this issue, but it would hopefully more or less eliminate "Bad TLP" issues.

mylylyl commented 1 year ago

Hi Ufrisk,

Thanks for the answer. I also notice excessive heat and I guess that's the issue. Would also love to try 4.11 when it comes out!

ufrisk commented 1 year ago

The v4.11 of the FPGA project has been out for a while.

mylylyl commented 1 year ago

The v4.11 of the FPGA project has been out for a while.

was looking at the release tab, not paying attention to the commits. Will try it out! Thanks again for your great work!

ufrisk commented 1 year ago

Awesome :)

I don't really do "releases" in the fpga project since there are so many hardwares and many of them are on different versions. I usually just push the release updates to it like I did this time.

mylylyl commented 1 year ago

tried the new firmware & added some heatsink on Screamer but still experiencing this issue. I checked with a thermometer and the temperature is only ~45 c. USB-C port is a little bit higher but I assume those chips are designed to work under this temperature.

ufrisk commented 1 year ago

Auch, so it's not your issue then.

I'm afraid I'm out of ideas what may be causing it then :\