dear experts---I would like to learn how to write programs that communicate over USB. both the host (desktop linux) and the client (beaglebone black) are running linux. I can program both host and gadget. ultimately, I will want to treat one USB port as a dedicated link between the two, without other protocols or hubs allowed. (there is reason but no method [yet] to my madness.) I usually like to start with "simplest cases", which in this case presumably means that the host sends a usb_bulk_msg() and my gadget prints it on the screen and responds. I could then slowly generalize up. to learn, I started reading on the linux-usb.org website. the press release tells me that we just started---in 2001. the first document tells me that usb 2.0 is about to be adopted. (not kidding.) the usb programming guide is from 2000. other front-website content is about kernel versions 2.2 vs 2.4. similarly, wider google searches now lead to tons of other outdated material. I am afraid that I am going to spend weeks learning material that will turn out obsolete. please don't take my comment here as a complaint---I know you are volunteers and busy with the code itself. in any case, I am running 3.13 and it is 2014 now. someone needs to update the website. linux-usb.org is not a wiki, so I can't make changes. Stephen---can you decruft this a little, or should I make some suggestions? for newbies like me, it would be useful to have links to good up-to-date documentation that tells us/me at least the basic structures. And I need simple starter skeleton C programs that are recommended, current, and functional, that I can extend. I have seen some here and there, usually either very involved or higher level. * I need a basic usb_bulk_msg() sender example with working basic "echo" responder at first. * what's the best way to start learning the USB software stack on reasonably current kernels, without imposing too much on readers of this mailing list? * are there good up-to-date books? /iaw ---- Ivo Welch (ivo.welch@xxxxxxxxx) http://www.ivo-welch.info/ -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
