Yes it is. The PRUs are independent and have 1 tick access to their gpio pins, and something like 3 to 8 ticks (I can't remember exactly) access for regular gpio pins (they are in system memory, accessible by the pru).
You can find documentation, compiler, and examples here: https://github.com/beagleboard/am335x_pru_package And here's a list of the pru-gpio header pins: https://docs.google.com/spreadsheet/ccc?key=0As0aJokrBccAdGkxeHkyYW1qRHNQdm5yZDhPQlRNR2c<https://docs.google.com/spreadsheet/ccc?key=0As0aJokrBccAdGkxeHkyYW1qRHNQdm5yZDhPQlRNR2c#gid=0> On Monday, September 30, 2013 6:40:57 AM UTC-7, dthph...@gmail.com wrote: > > Is it possible to use these two PRU (pru0 and pru1) simultaneously to > control fast GPIO in direct PRU - output mode? If yes, how can we do that > with only r30? > > Phong > > Vào 04:12:39 UTC+7 Thứ năm, ngày 16 tháng năm năm 2013, Jason Kridner đã > viết: >> >> Frequently asked questions regarding "PRU": >> >> - What is a "PRU"? >> - PRU stands for Programmable Real-time Unit. The overall subsystem >> is typically called the ICSS, PRU-ICSS or PRUSS. ICSS stands for >> Industrial Communications Subsystem and PRUSS stands for Programmable >> Real-time Unit Subsystem. >> - What does a PRU do? >> - A PRU is a 200MHz microcontroller that is really useful at >> "bitbanging" and has some peripherals attached to it that make it well >> suited for building real-time interfaces to all types of digital >> electronics. >> - What are the processing elements within the AM33xx PRUSS used on >> BeagleBone and BeagleBone Black? >> - 2 32-bit 200MHz PRU cores >> - Each with 8KB of program memory >> - Direct access to general purpose I/O >> - Single cycle operations without cache or pipelines (instructions >> *always* 5ns) >> - Shared 12KB data memory >> - Scratch pad registers >> - Parallel and serial capture modes >> - 32-bit port to memory and other peripherals outside of the >> PRUSS, including external memory >> - What are some example things built out of PRUs? >> - DMX512 lighting protocol: >> http://beagleboard.org/CapeContest/entries/BeagleBone+DMX+Cape/ >> - 6502 memory interface: >> >> http://elinux.org/images/a/ac/What's_Old_Is_New-_A_6502-based_Remote_Processor.pdf >> - Emulated memory interface on an Atari 600XL with BeagleBone >> decoding video directly into Atari 600XL display memory: >> http://www.youtube.com/watch?v=1irR4TQ5aMA >> - Nixie tube interface: https://github.com/mranostay/beagle-nixie >> - Software UART: >> >> http://processors.wiki.ti.com/index.php/Soft-UART_Implementation_on_AM335X_PRU_-_Software_Users_Guide >> - Sine wave generator using PWMs: >> http://elinux.org/ECE497_BeagleBone_PRU >> - 3D printer stepper motor driver: >> >> http://hipstercircuits.com/pypruss-a-simple-pru-python-binding-for-beaglebone/ >> - Camera interface: >> http://www.hitchhikeree.org/beaglebone_capes/interacto/ >> - Where do I get some more details? >> - https://github.com/beagleboard/am335x_pru_package is the >> official location for documentation and tools for the PRUSS on >> BeagleBone >> and BeagleBone Black. >> - http://elinux.org/Ti_AM33XX_PRUSSv2 is the community wiki page. >> >> >> -- 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/groups/opt_out.
