-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I've crawled through the TI documentation and made a table of the available pins (see the bottom of stepgen.p in the am335x branch).
PRU Pins connected on the BeagleBone P8/P9 headers: =================================================== PRU0 has 8 output pins and 4 input pins connected. PRU1 has 1 input pin and 14 pins that can be configured as in or out connected. In addition, either PRU can talk directly to *ANY* of the GPIO pins, but not as quickly as the dedicated PRU I/O. Also, HAL itself can talk directly to the GPIO pins for signals that do not need to be watched at the base thread rate (ie: home/limit switches, coolant on/off, etc). On 2/5/2013 9:02 AM, Gregory Perry wrote: > There are two (2) 200MHz RISC cores that constitute the PRUSS > subsystem on the BeagleBone. Each can address eight (8) pins on > the expansion headers, for a total of 16 pins. > ________________________________________ From: Gene Heskett > [ghesk...@wdtv.com] Sent: Tuesday, February 05, 2013 9:52 AM To: > emc-developers@lists.sourceforge.net Subject: [Emc-developers] > BeagleBone question > > Greetings all; > > There has been a discussion of the BeagleBone's 'PRU' (I think I > got the acronym right) in terms of using it as a stepper driver. > That does sound promising, but no one has said so far, how many of > these PRU's can be programmed on one BeagleBone. As it appears to > have more than enough GPIB pins to get the job done, the question I > have is: How many of these PRU's can it actually maintain and > service? > > $125 for the devel kit is a price I'm not doing if its $125 per > stepper being controlled. But if it can do a PRU per GPIB pin, its > going to be a lot more appetizing. > > And even moreso when a breakout board has been built for a > reasonable price that actually gives us the ability to use all of > the GPIB pins, which will approximately double the number of pins > available from a parport setup. > > Cheers, Gene -- "There are four boxes to be used in defense of > liberty: soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) My web page: > <http://coyoteden.dyndns-free.com:85/gene> is up! My views > <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> > > Honesty is the best policy, but insanity is a better defense. > I was taught to respect my elders, but its getting harder and > harder to find any... > > ------------------------------------------------------------------------------ > > Free Next-Gen Firewall Hardware Offer > Buy your Sophos next-gen firewall before the end March 2013 and get > the hardware for free! Learn more. > http://p.sf.net/sfu/sophos-d2d-feb > _______________________________________________ Emc-developers > mailing list Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > > ------------------------------------------------------------------------------ > > Free Next-Gen Firewall Hardware Offer > Buy your Sophos next-gen firewall before the end March 2013 and get > the hardware for free! Learn more. > http://p.sf.net/sfu/sophos-d2d-feb > _______________________________________________ Emc-developers > mailing list Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > - -- Charles Steinkuehler char...@steinkuehler.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlERJ10ACgkQLywbqEHdNFwhGwCfS3Ef7jEKXokV37yw9odf7NXF X+wAoNkC+4JuDdAwaRiaXCZehltB9Jwr =Xyov -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
