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 :) 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. Good luck! greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
