Hi, I want to change the boot order of the beaglebone black to USB disk-> eMMC->others. What topics should I study? I also want to remove the boot button. I want it such that whenever the U-Boot would search in the USB for linux image.
Thanks. On Tuesday, October 29, 2013 10:21:09 PM UTC+8, Gerald wrote: > > Correct. Unless you want to change the boot mode. > > Gerald > > > > On Tue, Oct 29, 2013 at 9:05 AM, <[email protected] <javascript:>> wrote: > >> So I should not input high,low either . >> I undertood. Thank you. >> >> 2013年10月28日月曜日 22時14分01秒 UTC+9 Gerald: >>> >>> A. The pins cannot float. They are already terminated on the board, >>> either hi or lo. >>> >>> Gerald >>> >>> >>> >>> On Sun, Oct 27, 2013 at 9:46 PM, <[email protected]> wrote: >>> >>>> Hi, >>>> Please tell me about correct circuitry to use boot pins as input, >>>> >>>> I use Beaglbone Black and want to use these pins, >>>> especially eQep counter pins P8-33,35,41,42 that match to SYS_BOOT >>>> 4,5,12,13. >>>> >>>> In SRM (ver A6) p104 it says, >>>> "If you plan to use any of these signals, then on power up, these pins >>>> should not be driven." >>>> >>>> Which of below is correct circuitry? >>>> A) Attach pins to ground until SYS_RESETn goes high. >>>> B) Keep pins floated until SYS_RESETn goes high. >>>> >>>> A is easier, because it can be done by switching 1 relay pulling all >>>> pins to ground. >>>> For B, I need plenty relays. >>>> >>>> Thanks, >>>> Tohru >>>> >>>> >>>> 2013年4月12日金曜日 4時20分23秒 UTC+9 DarkHelmet: >>>> >>>>> You can absolutely use them for other usages, once the value has been >>>>> latched at boot they can be re purposed It may be necessary >>>>> to strengthen the pull up/down on those lines with external resistors >>>>> though. I've encountered an issue where my TTL inputs were pulling the >>>>> lines low at boot while the CPU latched the config, preventing it to boot >>>>> from the correct configuration. Resistors of ~50k seem to do the trick. >>>>> >>>>> On Friday, April 5, 2013 6:04:18 AM UTC-4, [email protected] wrote: >>>>>> >>>>>> Hi, >>>>>> >>>>>> I've a beaglebone with the XAM3359Z0Z, >>>>>> >>>>>> >>>>>> I discovered that there is 19 pins dedicated to the boot >>>>>> configuration. >>>>>> The documentation said that depending of the position of the switch, >>>>>> The beaglebone will boot with the sd card, uart, ..... . >>>>>> ( http://processors.wiki.ti.com/index.php/AM335X_StarterWare >>>>>> _Booting_And_Flashing#Boot_Modes) >>>>>> >>>>>> >>>>>> I wanted to know if it is possible to use these pins for an another >>>>>> usage? How ? I don't need an another boot mode, the default one is >>>>>> enough >>>>>> for me. >>>>>> >>>>>> >>>>>> >>>>>> Thank you in advance for your help, >>>>>> >>>>> -- >>>> 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]. >>>> >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> -- >> 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] <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- 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]. For more options, visit https://groups.google.com/d/optout.
