If you still want to use the same pins, you can create an extra enable pin, after everything boots up into the kernel, use gpio_request and gpio_output to enable to the (EN pin) of power supply of your motor.
In this way you prevent SYSBOOT affected and other voltage flows in, to affect power up sequence. On Fri, Jan 27, 2017 at 7:44 AM, Justin Pearson <[email protected]> wrote: > On Thursday, January 26, 2017 at 12:34:54 PM UTC-8, RobertCNelson wrote: >> >> See Page 106/107 of: >> >> https://github.com/beagleboard/BeagleBone-Black/blob/master/BBB_SRM.pdf >> > > Thanks Robert. For our viewers at home, the BBB uses pins lcd_data0 thru > 15 as "SYSBOOT" pins that configure where the device boots from. > > Derek Molloy's table > <http://exploringbeaglebone.com/wp-content/uploads/resources/BBBP8Header.png> > shows that those correspond to header pins P8_31 thru P8_46 (not > necessarily in that order). > > My rotary encoder may have been asserting a voltage on some of those pins. > Next time I'll try unplugging it. > > Thanks very much! > -Justin > > > > >> Regards, >> >> -- >> Robert Nelson >> https://rcn-ee.com/ >> > -- > 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/f4954c13-91b3-4bb7-82e4-7282aaaddd6a%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/f4954c13-91b3-4bb7-82e4-7282aaaddd6a%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- Yiling Cao http://ariaboard.com/ http://shanghainovotech.com/ -- 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/CAMMUdpKwvQ1frCkh40ABkb67mh3b%3DT56uhXptJnBUbO02kf1%3Dg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
