Hallo Kai, Thanks for the suggestion. I considered doing something like that, and am still weighing my options. I have competing interests of wanting to make this usable for anyone who might be able to, wanting to keep it as simple as possible for myself, wanting to do things the most 'correct' way, and also wanting to explore and learn more, since I don't have a lot of experience with Linux in general or kernel programming in particular. I will probably continue to post here as my exploration proceeds. I hope I don't pollute people's inbox too much!
Vielen dank, Bill On Tuesday, July 9, 2019 at 8:10:24 PM UTC-4, [email protected] wrote: > Hi Bill, > > I just did something very similar. If you have a working communication > channel between PRU and user space anyway (probably RPMsg), you could read > the location from the PRU code using: > > myvar = resourceTable.shared_mem.pa; > > and communicate that address to user space using RPMsg. > > If you're anyway writing a Linux kernel driver, you could also extract the > address from the remoteproc driver and expose it, for example, through > sysfs, but I don't have a working solution for that. > > Cheers, > Kai > > > Am Montag, 1. April 2019 00:44:27 UTC+2 schrieb Bill M: >> >> Greetings All, >> >> TLDR; what is the best way to access PRU remoteproc carveouts from >> userspace? >> >> I have a (working) project for reading an 8-bit parallel interface camera >> that I originally wrote using UIOPRUSS. I decided to take the plunge and >> work through the remoteproc documentation to see if I could move to that. I >> didn't want to use rpmsg, because I doubted it could handle the data >> velocity (320 x 240 x 24bit color x 15 frames per second = 3,456,000, >> roughly 3MB a second). I discovered carveouts in the resource table >> headers, and thought this was excellent since it was much like how I was >> already doing it with UIOPRUSS. It works and simplifies the code greatly, >> but I have to use debugfs to get the carveout location to mmap to, which >> seems less than ideal. What is the best way to expose the carveout to >> userspace? Any suggestions appreciated. >> >> Thanks! >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/869cd27f-7e4b-49f7-8145-7c3f54581261%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
