Usually with a tool called wireshark ( https://www.wireshark.org/download.html) and a filter enabled for usb only. Depends on your system environment, you maybe have to install a general purpose usb driver which enables to debug the usb traffic.
But the last time I used wireshark, it will give you a hint if that is needed. LUH LAH <[email protected]> schrieb am Do., 21. Okt. 2021, 21:07: > Hello there! > > Sorry about that, looks like it was indeed scrubbed. > > I've instead uploaded them to here: > > https://drive.google.com/drive/folders/1-n2ABYtWhAGOW18siwKGjOc81Op7IUIA?usp=sharing > > ------------------ > How do you capture a USB session? > > Thanks, > > -[K] IMSOASIAN > > On 10/21/21, Ralph Little <[email protected]> wrote: > > Hi, > > > > On 2021-10-17 7:25 p.m., LUH LAH wrote: > >> Hello there! > >> > >> I recently acquired a Canon 4200F scanner and realized after extensive > >> research that the USB chip couldn't be found. So, I opened up and > >> de-soldered the mainboard RF shield/Heat Sink to find a bunch of > >> chips. > >> > >> I've attached said images to this message. > >> > >> My question is, what chip is exactly for the USB port? > >> > >> Thank you very much! > >> > >> -[K] IMSOASIAN > >> > > The scanner is not currently supported by SANE. > > We do have a prior report from someone documented here: > > http://www.sane-project.org/unsupported/canon-4200f.html > > > > However, I'm not aware of any active work on this machine. > > > > The chip marked L6219DS appears to be a PWM motor controller: > > > https://www.allegromicro.com/-/media/files/datasheets/l6219ds-datasheet.ashx > > > > The chip marked WM8196SCDS appears to be an ADC for the imager: > > https://pdf1.alldatasheet.com/3efc5524-e7be-47c7-99d3-9d2c2ebaba01 > > > > There is a DRAM memory package: > > https://www.esmt.com.tw/upload/pdf/ESMT/datasheets/M12L16161A(2R).pdf > > > > The other chip is probably a microcontroller of some sort, which may > > have an integrated USB port. > > > > Unless you can identify the microcontroller, then analysis of captured > > USB sessions using the Windows driver is what you have left. > > --------------- > > > > I didn't get the images that you say that you have attached. They may > > have been scrubbed in the submission process. > > Perhaps you could reply to the list and myself with the attachment again? > > > > Cheers, > > Ralph > > > >
