On Tue, 4 Sep 2018 at 07:31, Greg KH <greg@xxxxxxxxx> wrote: > > On Mon, Sep 03, 2018 at 09:12:35PM +0200, Thomas Bracht Laumann Jespersen wrote: > > Hello all! > > > > I'm working on a project where we want to integrate into a production line and > > listen on connected devices, and the challenge is that our setup needs to be > > fast enough. > > First off, "tight time constraints" and "usb-serial" should never be in > the same sentence, unless you use the words "never will happen" in there > as well :) I'm learning (beginning to accept) that :-) This is pretty new territory for me, so I appreciate the wisdom. > > There are loads of issues with trying to use USB with anything you wish > to have low-latency or determinism with, and then throw a usb-serial > device into the mix and all bets are off. Remember there is a little > microcontroller out there at the end of the usb-serial device running a > UART and some unknown firmware blob that can take its time and do > anything it wants at any point in time, which can, and will, cause you > all sorts of headaches as you are finding out. > > If you _really_ need to do something like this, use a UART attached to a > PCI card, you will have much better control and be able to actually do > what you are wanting to do here. We need to find a solution somehow, so thanks for the suggestion. I'll keep digging for solutions, but if you have any good resources I should look at, I'm all ears. > > Good luck! Thank you! _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
