Re: [beagleboard] BBB don't boot sometimes

Hi Fohnbit, Keyed entry just means that u-boot will be looking for a specific stop character instead of "any key". Details for the changes are here with a link to RCN's instructions & patches for building u-boot. -Ron On Sunday,

Re: [beagleboard] BBB don't boot sometimes

Hello Ron, what did you mean with "keyed entry"? Maybe you have a link or a instruction for this? Thank you! Am Freitag, 13. November 2015 16:29:59 UTC+1 schrieb Ron B.: > > You definitely need a supply that can generate enough current to have a > decent ramp-up of 5V or the PMIC gets angry.

Re: [beagleboard] BBB don't boot sometimes

You definitely need a supply that can generate enough current to have a decent ramp-up of 5V or the PMIC gets angry. But, there's also the issue of u-boot stopping if it sees a "phantom character" from the UART. So, if you need high reliability start-up you should rebuild u-boot for "keyed

Re: [beagleboard] BBB don't boot sometimes

Hello, I use this: http://www.meanwell.com/webapp/product/search.aspx?prod=dr-15 DR-15-5 Am Montag, 9. November 2015 16:23:14 UTC+1 schrieb Wulf Man: > > As posted here a few times. > If your power supply does not have a fast enough rise time getting up to > voltage > your BBB will not boot

Re: [beagleboard] BBB don't boot sometimes

rise time spec 1000ms setup 50ms rise time maybe gerald can give his thumbs up on that spec seems fast enough can you put a scope on it to be sure ? maybe the power supply is out of spec some of the time i have been using a cheap 5 dollar chinese supply for 2 years with no issues On 11/10/2015

Re: [beagleboard] BBB don't boot sometimes

I forgot: I power up the power supply ... So not only connected the BBB on the Running power supply. Trank you Am Dienstag, 10. November 2015 18:58:40 UTC+1 schrieb Wulf Man: > rise time spec > > 1000ms setup 50ms rise time > > maybe gerald can give his thumbs up on that spec >

[beagleboard] BBB don't boot sometimes

Hello! Sometimes my BBB Rev C dont boot, when I connect the 5V. The Power LED is on but the 4 USR LED are off. This happen not really often ... So I have no debug information. But maybe someone has the same problem and know where the problem is? Thank you! -- For more options, visit

Re: [beagleboard] BBB don't boot sometimes

On Mon, Nov 9, 2015 at 3:24 PM, William Hermans wrote: >> Powered by "usb" with a "usb" dongled plugged = no power left for the >> cpu... >> >> Regards, > > > I have found that you *can* power by USB and use ethernet, but that is it. > So when we tried powering by USB, and use

Re: [beagleboard] BBB don't boot sometimes

> > *It also depends on the usb host/hub, on power up we get 100mA, and in* > * u-boot we request "1.3A" over usb... If we actually get that "1.3A" we* > * can do a lot, but most often then not we only get 500mA's..* > > * I don't have the exact numbers at my desk, but i thinking a booting* > *

Re: [beagleboard] BBB don't boot sometimes

> > *Powered by "usb" with a "usb" dongled plugged = no power left for the > cpu...* > > * Regards,* > I have found that you *can* power by USB and use ethernet, but that is it. So when we tried powering by USB, and use ethernet + CAN . . . the board sometimes works, the board sometimes does not

Re: [beagleboard] BBB don't boot sometimes

As posted here a few times. If your power supply does not have a fast enough rise time getting up to voltage your BBB will not boot reliable. You have not said what specs your power supply is or where you got it from. On 11/9/2015 8:02 AM, Fohnbit wrote: > Hello! > > Sometimes my BBB Rev C dont

Re: [beagleboard] BBB don't boot sometimes

I have the same problem. I often connect BBB with a PCB as power source and don't have such problem. But when I power it with USB of my MAC, it does that some time. (I also attach a WiFi USB dongle to the BBB). On Monday, November 9, 2015 at 10:23:14 AM UTC-5, Wulf Man wrote: > > As posted

Re: [beagleboard] BBB don't boot sometimes

On Mon, Nov 9, 2015 at 2:51 PM, Xu Wang wrote: > I have the same problem. > I often connect BBB with a PCB as power source and don't have such problem. > But when I power it with USB of my MAC, it does that some time. (I also > attach a WiFi USB dongle to the BBB). Powered by

Re: [beagleboard] BBB don't boot sometimes

On Mon, Nov 9, 2015 at 3:46 PM, William Hermans wrote: >> It also depends on the usb host/hub, on power up we get 100mA, and in >> u-boot we request "1.3A" over usb... If we actually get that "1.3A" we >> can do a lot, but most often then not we only get 500mA's.. >> >> I don't