On 2/19/2015 5:58 PM, Bit Pusher wrote: > Charles, thank you for getting back to me. Could you tell me which Pru > Reference > Guide you are quoting. The one I have is: SPRUHF8A, revised June 2013, and > section 5.3.4.2.3.1 does not have the words "Standard PRU Core Support" in > it.
SPRUHF8–May 2012 In general, the older PRU documentation has less stuff redacted. :) > The reference I have has examples of indirect reads followed by examples of > indirect > writes where in each case the semantics *r1.b0 (for example, used in the > first indirect write example) indicates the lowest significant byte of > register r1 contains the address of the register that should be written, in > the example, r1 contains 8, so the register written into in the example is > register 2 which starts at byte 8. and in this example, since a single byte > is being written, register 2 ends up containing 0x00000004, the least > significant byte of r3. In the reference I am reading, the word "pseudo" > does not occur in section 5.3.4.2.3.1; do you have a newer reference? My > understanding is the whole point of the MVIx op codes are to allow for > first indirect addressing (where the specified register contains the > address of the register to be either read from or written to, as indicated > by typing '*' just in front of the register name, and that both read and > written registers can contain '*', that is can be indirect) and also to > allow for auto incrementing and/or decrementing; it's the auto incrementing > I really want otherwise I have to use a number of instructions to realize > the equivalent. I can only guess that the reference you are quoting from is > different than the one I have; could you give me a link to the reference > you are quoting from? Irrespective, this still does not explain the error > message "This form of MVIx illegal with specified core version"; I can not > find anywhere which cores support MVIx and which do not. In the meantime, I > will read the example you suggest.Thanks again. Yes, read through the BeagleBone logic analyzer code. It's been tweaked to run as fast as possible, and is known to work. -- 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.
