Hi Walter! A further "old dog" here. Sometimes I'm still working on my old Hades computer with 68060 CPU (loving that box).
In my house I'm using a BBB for a solar system running 24/7. It also controlls two valves (on/off, and four AC pumps in 16 power levels), connected to WLAN by an external USB-Stick. Most temperatures are comming from 1-wire sensors, but ADC is used to fetch samples from a high-temperature sensor on the roof/collector. You should know that the onboard TSC_ADC_SS sometimes hangs, due to electromagnetical noice. In that case it allways measures/serves the same voltage, regardless of the changing input. There's a way to unblock the subsystem by software. But the better solution is to spend some effort in a decoupled input circruitry. In a new project I start the controller development on ARM, doing measurements by libpruio. Once the prove of concept is done, I migrate the controller loop to the other PRU for hard real-time capability. libpruio is perfect for that concept, since the measurements are available from both sides, ARM and PRU. All setup is coded only once (on ARM), and only the inner controller loop needs adaption (from ARM to PRU). In that adaption the controller usually gets much better, since you won't repeat the bugs and pitfalls from the POC phase. The most important initial decision is concerning the kernel driver to use. Drop rproc, and use uio_pruss driver instead. Then data exchange is pretty easy. Ie use DRam[0,1] for PRU-writing and SRam for ARM-writing. A simple and effective concept to avoid writing collisions (and pretty fast as well). uio_pruss driver provides pointers to that memory, while using rproc you've to find a solution by yourself. Regards -- 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/d715b191-d95b-4b86-8fae-eb618c74ddc5n%40googlegroups.com.
