thanks a lot! вторник, 29 января 2019 г., 2:19:35 UTC+3 пользователь Graham написал: > > Read the BeagleBone System Requirements Manual. > Section 8.3 and 8.3.1 > It tells you several times about the requirement to protect the boot pins, > which are common with the LCD pins. > > During boot, long before the device tree has any effect, the processor > must read the 100K pull up and pull down resistors on these lines, in order > to know which options to use to boot. > > If your cape puts any kind of load on these lines, that would modify the > result of the processor trying to read the 100K resistors, then the > processor will be trying to boot with some other wrong option, with the > usual result of not successfully booting. > > --- Graham > > == > > > On Monday, January 28, 2019 at 6:52:28 AM UTC-6, Serg Penshin wrote: >> >> Hi averyone, >> Is it possible to change LCD data pins to another GPIO? The fact is that >> my cape does not allow the Beaglebone Black to boot normally, because LCD >> pins are used when BBB boot. Although if I connect it after boot BBB, then >> it works well. I tried to reconfigure the pins in the device tree so as not >> to touch the boot pins, but there is no signal on them. Although the cape >> attached in the slot. >> Please help me, I'v no idea, what is wrong. >> Here is my device tree-source: >> https://yadi.sk/d/VjxN_P-Vl4x9Uw >> >>
-- 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/26e07a0b-11f9-4340-bac9-ce67577938e1%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
