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 <[email protected] > <javascript:>> 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 [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Gerald > > [email protected] <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 [email protected]. For more options, visit https://groups.google.com/d/optout.
