>From userland, and using /dev/mem + mmap() it is possible to get ~3MB/second worth of samples from the on die am335x processors ADC. Granted, many of these samples are redundant, but I wrote a C application to do this, *just* to see how much such an application could handle.
Theoretically, the PRU's should be capable of much more, since the code to read from an ADC would not be loading the am335x processor. I do not recall how much this application I experimented with was loading down the am335x processor under Linux, but I am wanting to say it was pretty much maxed out. On Tue, Sep 13, 2016 at 3:27 PM, Greg <soapy-sm...@comcast.net> wrote: > Hi Paul- >> > > I'm using the RPMsg character device to transfer 16 bit data PRU to ARM at > a rate of 8ksps. This is a low rate compared to your requirement, however, > I am not seeing significant ARM processor loading at this rate. I don't > know the practical upper limit of RPMsg as deployed in the PRU examples, > but perhaps 100ksps is not out of the question. > > My impression is that the kernel programmers have a very good tool box for > efficient handling of data, and I assume the RPMsg took advantage of these > tools. > > My present scheme is to use one character device as a data stream, and > another for PRU control functions. I'm not deep into it yet, so I can't > comment on the practicality of this scheme with the remoteproc/RPMsg > framework. > > Regards, > Greg > > -- > 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 beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/beagleboard/298bd9f1-bd28-4d6c-97b3-05b80925662f%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/298bd9f1-bd28-4d6c-97b3-05b80925662f%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORoqX5a8LRJr_bxjDFVYpaU_z0n8MxWHHfJ5VaGKVwHNww%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
