"raming" = remaing I honestly think my keyboard is failing . . .
On Fri, May 6, 2016 at 1:13 PM, William Hermans <yyrk...@gmail.com> wrote: > Robert, >> >> What do you need or want to use the PRUs for ? These pins you're talking >> about are probably shared with the HDMI pins, but are not the only pins the >> PRU have access to. These pins are probably the pins the single cycle(5ms) >> access to >> , where the PRU's can access any pin on the board, just not with single >> cycle access. More like 3+ cycles if memory serves correctly. >> >> My answers this morning did not include this earlier because I was not >> quite awake yet. . . > > > Put more acurately. > > > - The pins you're asking about are shared with the header pins for the > HDMI framer. > - Your LCD uses HDMI, so in order to use those pins, you would have to > disable HDMI. > - The PRUs can access any GPIO pin on the board, but the ones shared > with HDMI( and a few others ) can be accessed by the PRU in a single PRU > cycle - 5ms. > - The rest of the pins can still be accesses by the PRU's, just with a > higher access latency. 3-5 cycles if I remember right. > > > So to solve this problem of yours, you have some options. Disable the HDMI > pins, and re-enable for PRU GPIO access, for full speed GPIO, or use > different pins and access the pin slower . . .Or perhaps the remaining > single cycle access pins raming for PRU0 / PRU1 are enough for what you > need ? > > So again, I ask. WHat ddo you need the PRU's for ? ;) > > On Fri, May 6, 2016 at 12:58 PM, William Hermans <yyrk...@gmail.com> > wrote: > >> Robert, >> >> What do you need or want to use the PRUs for ? These pins you're talking >> about are probably shared with the HDMI pins, but are not the only pins the >> PRU have access to. These pins are probably the pins the single cycle(5ms) >> access to >> , where the PRU's can access any pin on the board, just not with single >> cycle access. More like 3+ cycles if memory serves correctly. >> >> My answers this morning did not include this earlier because I was not >> quite awake yet. . . >> >> On Fri, May 6, 2016 at 12:53 PM, Robert Jonathan Šimon < >> bertiks...@gmail.com> wrote: >> >>> I have another Question on PRUs. It has 9 pins for first PRU and 15 pins >>> for the second PRU (according to this schematic >>> <http://beagleboard.org/support/bone101/#headers-pru>). Is there any >>> option to expand number of pins, which I cand use by the PRUs? >>> >>> Dne pátek 6. května 2016 18:25:14 UTC+2 Robert Jonathan Šimon napsal(a): >>> >>>> Ok. Great. Thanks for your time. >>>> >>>> Dne pátek 6. května 2016 18:21:47 UTC+2 William Hermans napsal(a): >>>>> >>>>> Better yet, I'll tell you what's better to do. Contact the >>>>> manufacturer of that screen, and ask what you're options are. >>>>> >>>>> If you're lucky, it could be possible to rewrite the device tree >>>>> overlay file for that screen to work using alternate pins. >>>>> >>>>> If you're unlucky, you'll have to buy a different kind of screen. >>>>> >>>>> On Fri, May 6, 2016 at 9:18 AM, Robert Jonathan Šimon < >>>>> berti...@gmail.com> wrote: >>>>> >>>>>> Sorry, i send the wrong link. On this link >>>>>> <https://www.soselectronic.cz/productdata/15/37/24/153724/4DCAPE-70T_datasheet_R_1_2.pdf>, >>>>>> there is a picture, where you can see precisely which pin it is using >>>>>> >>>>>> Dne pátek 6. května 2016 18:12:17 UTC+2 William Hermans napsal(a): >>>>>>> >>>>>>> Ok, so, I do not have time to read through all the literature for >>>>>>> that screen. Which pins does it use, what is the specific function of >>>>>>> each >>>>>>> pin, and what "protocol" does the screen use ? >>>>>>> >>>>>>> Is it one of those modified 9pin SPI + GPIO screens ? >>>>>>> >>>>>>> On Fri, May 6, 2016 at 9:02 AM, Robert Jonathan Šimon < >>>>>>> berti...@gmail.com> wrote: >>>>>>> >>>>>>>> I have this LCD screen >>>>>>>> <https://www.soselectronic.cz/products/4dcape-70t#tabs-6> and it >>>>>>>> user most of the second PRU pins and one of the first PRU unit. I am >>>>>>>> not >>>>>>>> sure, if this is problem or not. >>>>>>>> >>>>>>>> Dne pátek 6. května 2016 17:59:11 UTC+2 William Hermans napsal(a): >>>>>>>>> >>>>>>>>> *Hi,* >>>>>>>>>> *I am starting to play with PRU on BBB, and I noticed, that when >>>>>>>>>> I want to use PRU on BBB and on the same time use LCD display >>>>>>>>>> through GPIO, >>>>>>>>>> i cant (they use the same pins). Is there any workarounds?* >>>>>>>>>> >>>>>>>>> *Thanks a lot* >>>>>>>>> >>>>>>>>> I suppose that depends on how far you're willing to go, and >>>>>>>>> changes you're willing to make. You can buy a different LCD screen, >>>>>>>>> and >>>>>>>>> perhaps even type of screen that uses different peripherals. >>>>>>>>> >>>>>>>>> But you can start by telling us which LCD screen you're using, and >>>>>>>>> being more verbose as to how this LCD is connected. exactly which >>>>>>>>> pins are >>>>>>>>> required, etc. >>>>>>>>> >>>>>>>>> >>>>>>>>> On Fri, May 6, 2016 at 8:41 AM, Robert Jonathan Šimon < >>>>>>>>> berti...@gmail.com> wrote: >>>>>>>>> >>>>>>>>>> Hi, >>>>>>>>>> I am starting to play with PRU on BBB, and I noticed, that when I >>>>>>>>>> want to use PRU on BBB and on the same time use LCD display through >>>>>>>>>> GPIO, i >>>>>>>>>> cant (they use the same pins). Is there any workarounds? >>>>>>>>>> Thanks a lot >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> 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...@googlegroups.com. >>>>>>>>>> To view this discussion on the web visit >>>>>>>>>> https://groups.google.com/d/msgid/beagleboard/05e300cd-e354-41fc-9247-c145f95c1bbe%40googlegroups.com >>>>>>>>>> <https://groups.google.com/d/msgid/beagleboard/05e300cd-e354-41fc-9247-c145f95c1bbe%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>>>> . >>>>>>>>>> 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...@googlegroups.com. >>>>>>>> To view this discussion on the web visit >>>>>>>> https://groups.google.com/d/msgid/beagleboard/00bd2619-13de-4e34-bfb1-bd41f2af0d20%40googlegroups.com >>>>>>>> <https://groups.google.com/d/msgid/beagleboard/00bd2619-13de-4e34-bfb1-bd41f2af0d20%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>> . >>>>>>>> >>>>>>>> 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...@googlegroups.com. >>>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/d/msgid/beagleboard/fd49e6fe-7b82-4f36-b16e-59a81df93f82%40googlegroups.com >>>>>> <https://groups.google.com/d/msgid/beagleboard/fd49e6fe-7b82-4f36-b16e-59a81df93f82%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> >>>>>> 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. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/beagleboard/a104b829-d942-4d82-a7c4-ef8f83dbd6a0%40googlegroups.com >>> <https://groups.google.com/d/msgid/beagleboard/a104b829-d942-4d82-a7c4-ef8f83dbd6a0%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORrQjwRsdeRej0uqLtJ1foxwWFDBfLe2kPy4%2Bv8_YGfvCA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
