Hi Jon, Yes under 3.1x some things have changed a bit for dts. I failed with bone-pinmux-helper when I tried.
It's still a WIP for me and also a LIP ( learn in progress :) ) Regards, Cedric 2014-09-25 8:01 GMT-04:00 Jon E <jesco...@googlemail.com>: > Hi, > > I have some simple examples of direct reading/writing under 3.8 (setting > mode 6, exclusive use etc).. > > https://github.com/dresco/pru_examples > > Have the device tree definitions have changed for 3.1x? I've not yet > successfully built my PRU code under the new 3.14 kernel, so perhaps > bone-pinmux-helper is no longer an option? > > Regards, > Jon > > On Thursday, 25 September 2014 04:12:53 UTC+1, Cedric Malitte wrote: >> >> Ok finally managed to build a dts using compatible='gpio-leds' for >> outputs and I now have a 15Mhz output. >> >> I'll investigate why when I try to use pru code compiled from C, the >> signal has a weird shape on the scope but using asm, it's a regular one. >> >> For inputs, I do not know yet if I should use compatible="gpio-keys" or >> something else, I did not find anything related to this yet. >> >> >> >> 2014-09-24 13:17 GMT-04:00 Cedric Malitte <cedric....@gmail.com>: >> >>> Hi, >>> >>> so trying to get my things up and running, I wrote a program for the PRU >>> in asm to toggle 2 pins and read 4. >>> >>> In C, I manage to manipulate them because I'm using GPIO. >>> But in asm... I try to interact with r30 and r31, and nothing really >>> happens... >>> >>> I"m with kernel 3.15. >>> >>> Could someone guide me ? >>> I think I have to add a dts to declare pins and pinmux, but I feel a bit >>> lost on this point. >>> >>> In case, this is my asm source >>> >>> #include "pru.h" >>> #include "pru_macros.hp" >>> >>> .origin 0 >>> .entrypoint MAIN >>> >>> >>> MAIN: >>> >>> /* enable ocp wide accesses */ >>> >>> LBCO r0, CONST_PRUCFG, 4, 4 >>> CLR r0, r0, 4 >>> SBCO r0, CONST_PRUCFG, 4, 4 >>> >>> /* prepared pru to host shared memory */ >>> >>> MOV r0, 0x000000120 >>> MOV r1, CTPPR_0 >>> ST32 r0, r1 >>> >>> MOV r0, 0x00100000 >>> MOV r1, CTPPR_1 >>> ST32 r0, r1 >>> >>> >>> MOV r10, 0 >>> MOV r11, 0 >>> MOV r12, 0 >>> /* main */ >>> LOOP1: >>> SET r30.t15 /* CLK high */ >>> MOV r10, r31.b0 /* Read in the data */ >>> >>> QBBC CHKSENSOR2, r10.b0.t0 /* if r10.0, set r11.0 */ >>> SET r11, 0 >>> CHKSENSOR2: >>> QBBC CHKSENSOR3, r10.b0.t1 /* if r10.1, set r11.15 */ >>> SET r11, 15 >>> CHKSENSOR3: >>> QBBC CHKSENSOR4, r10.b0.t2 /* if r10.2, set r12.0 */ >>> SET r12, 0 >>> CHKSENSOR4: >>> QBBC ENDCHECK, r10.b0.t3 /* if r10.3, set r12.15 */ >>> SET r12, 15 >>> >>> ENDCHECK: >>> CLR r30.t15 /* CLK low */ >>> LSL r11, r11, 1 >>> LSL r12, r12, 1 >>> ADD r0, r0, 1 >>> JMP LOOP1 >>> /* store results from r10,r11 into host memory */ >>> >>> SBCO r10, CONST_PRUSHAREDRAM, 0, 8 >>> >>> /* signal cpu we are done (never reached) */ >>> >>> MOV r31.b0, PRU0_ARM_INTERRUPT + 16 >>> HALT >>> >>> >>> Thanks, >>> >>> Cedric >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit https://groups.google.com/d/ >>> topic/beagleboard/DvlQWGZ5VEs/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> beagleboard...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/DvlQWGZ5VEs/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- 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.
