On 7/2/2014 12:25 AM, Spaced Cowboy wrote: > Two questions, really: > > 1) I have an assembly program running on PRU0 receiving data in a > tight loop, and I want to signal PRU1 at some point to do further > processing on the bytes received. Is it possible to have PRU0 write > into a register (say r2) on PRU1 using a SBBO and wake up PRU1 from > executing a WBS instruction ? It seems so, from the memory map, but > the docs seem to discourage WBS with anything other than r31
There are many ways you can communicate between the PRUs, but if you want to use a WBS instruction, you need to get one PRU to alter a bit in r31 of the other PRU. The only way I know to do this is to use the event/interrupt mechanisms. See Chapter 6 "Interrupt Controller" in the PRU reference guide. > 2) I'm seeing conflicting values for the size of program and data ram > on the PRUs. How much of each do the PRUs on the beaglebone black > actually have ? Each PRU has 8K of program memory and 8K of data memory. There is an additional 12K data memory shared between both PRUs. There's a nice picture of the PRU subsystem in the PRU Reference Guide (Figure 2, page 15). -- Charles Steinkuehler char...@steinkuehler.net -- 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. For more options, visit https://groups.google.com/d/optout.
