Ahh!!! Thanks Gerald.
Interesting that this is not configurable. Great to know what to expect though. Bill On Tuesday, December 15, 2015 at 1:54:08 PM UTC-8, Gerald wrote: > > It is in the data sheet, not the TRM. > > Table 4-1, columns 7 and 8. > > Gerald > > On Tue, Dec 15, 2015 at 2:52 PM, Bill Gray <bi...@velkess.com > <javascript:>> wrote: > >> Gerald, >> >> Thanks so much. >> >> How interesting! I suppose I can just cold boot the BBB and see which >> pins are where to figure out where things start, but I would love to read >> up more on this given that my hardware could get bricked if something were >> to change. >> >> Since I got your reply I've been pouring over the Technical Reference >> Manual, but I am not able to find a discussion of default pin states >> anywhere... could you throw me another clue to where I can find this info? >> >> Thanks again. >> >> Bill >> >> On Tuesday, December 15, 2015 at 11:35:20 AM UTC-8, Gerald wrote: >>> >>> The datasheet tells you the default for all the pins on power up. Some >>> are high and some are low. Until the SW changes that, they stay and the >>> preset levels. >>> >>> http://www.ti.com/product/am3358 >>> >>> >>> Gerald >>> >>> On Tue, Dec 15, 2015 at 12:04 PM, Bill Gray <bi...@velkess.com> wrote: >>> >>>> Hi, >>>> >>>> I'm developing a system that uses PRU 1 to send a PWM to a switched >>>> mode power converter. >>>> >>>> When I first turn the system on, I want the PWM signal to be low. If >>>> the pin is high, I will pretty much surely blow my mosfets as current >>>> surges through my circuit. >>>> >>>> For some reason, when I first turn things on the pin runs to high... >>>> I'm not sure why. >>>> >>>> This is before I start messing around with the device tree or >>>> anything. Cold boot. I apply power and even before the LEDs light up I >>>> can see that the pin in question runs high. >>>> >>>> Is there anyway I can control this behavior? >>>> >>>> Thanks, >>>> >>>> Bill >>>> >>>> -- >>>> 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. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> >>> >>> -- >>> Gerald >>> >>> ger...@beagleboard.org >>> http://beagleboard.org/ >>> >> -- >> 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 <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Gerald > > ger...@beagleboard.org <javascript:> > http://beagleboard.org/ > -- 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. For more options, visit https://groups.google.com/d/optout.
