spi is not really meant to have 2 masters on the same bus. I am sure you can figure something out using extra gpio pins to tell the beaglebone when the other master wants access.
On 8/23/2018 2:13 AM, [email protected] wrote: > I have some problem with spi > > I use BeagleBone Black to write eprom by using. after it finish > writing EPROM and the EPROM is read by other controller there is no > problem > > but after I reboot controller (BBB still operate) it can not read data > from EPROM after i checked with scope > > I saw that some SPI pin act like a ground that make other controller > cannot get the data because they always connected together > > right now my solution is just setting the pin mode back to gpio > > so is this a normal state pin of SPI? > is there any solution without swapping pin mode? > > I'm using kernel 3.8.13-xenomai-r78 with debian version 7.8 and it > occured to me too when i was using the newest image debian version 9.4 > -- > 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 [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/32222182-7273-4b81-9afa-d263b8b488ff%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/32222182-7273-4b81-9afa-d263b8b488ff%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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/36fd984f-2d6c-5573-6ebe-235f344bb8d2%40gmail.com. For more options, visit https://groups.google.com/d/optout.
