Hey, in case you were referring to the "Universal Serial Bus":
The short answer: As far as I know, there is no _direct_ way of using "USB communication in gnuradio". The long answer: Using "USB communication" might not be what you think it is, and there are good reasons why GNURadio might not want to implement a "generic usb interface block" of some sort: The USB protocol is rather complicated, and goes far beyond just serially moving data down single pipe, like what you'd get with simpler interfaces like UART. USB supports many different transfer modes, each with different latency, throughput and reliability guarantees on possibly many "pipes" in parallel. Oh, and interface configurations can change at runtime. Trying to support all this in a block would probably result in a huge mess. See the excellent "USB in a NutShell" [0] for more information on the USB protocol. Additionally, supporting application protocols directly in GNURadio would be yet another mess, because who knows what information an SDR and its driver on your host are actually exchanging - keep in mind that your host has to communicate some kind of control information with your device. If you're lucky, that's just a separate endpoint, but it could also be embedded in your sample stream ... That's why we leave USB communications to the vendor of an SDR (e.g. libuhd), and then just build a block that interfaces with that driver lib. Obviously you could also use libusb to interface with a USB device in an OOT module block, but that's the closest that you'll get to USB in GNURadio. [0] https://www.beyondlogic.org/usbnutshell/usb1.shtml ---------------------------------------------------------- Datum: Sonntag, 4. Oktober 2020 um 17:12 An: <[email protected]> Betreff: USB communication Simple question: How do I use USB communication in gnuradio? I can’t find any blocks that implement USB. I can’t find any reference to USB. I can’t find any discussion about USB on forums. There must be a way to implement one of the most common means of communication in the computer world. What am I missing? Thanks.
