Fount it. In the circuit drawing I connected P9.10 (SYS_RESETn) to the gate of the transistor 2n7000, but in the universal board I connected P9.9 (PWR_BUT). Now the board is booting up every time.
Le samedi 25 juillet 2015 16:15:46 UTC-3, Carlos Novaes a écrit : > > ehhr... > dont know why, but the pdf file does not open correctly on google docs. > Some connectors are not displayed, although the connections to the BBB > itself are perfect visible. Downloading and opening with a pdf viewer > (okular, acrobat...) works perfectly. > > Le samedi 25 juillet 2015 16:06:42 UTC-3, Carlos Novaes a écrit : >> >> Hi. >> Sorry for the delay, attached is a pdf with the schematic. I tried to >> take some pictures of my wiring and also to triple check the connections, >> but the lab was closed for fumigation. >> >> Some other points are: >> -> I am using both PRUs to read some encoders and generate four PWM >> signals (10bits @ 12KHz). In this schematic only the encoder inputs are >> complete. >> -> I am powering this cape with a switched industrial grade power supply. >> When I power up the board from the DC jack I am using a cheap adapter (also >> switched). >> -> If I power up from usb and after the board boot process I connect the >> power to the extension cape, then I can read one encoder (have not tested >> the others but they should). >> >> Thank you, >> >> Carlos Novaes >> >> Le vendredi 24 juillet 2015 18:43:39 UTC-3, Gerald a écrit : >>> >>> >>> Not sure what you are doing wrong, hard to tell. >>> >>> What is your power source? >>> Is it grounded? >>> How much current can it supply? >>> Can you send a picture of your wiring? >>> >>> Gerald >>> >>> >>> On Fri, Jul 24, 2015 at 4:37 PM, Carlos Novaes <[email protected]> >>> wrote: >>> >>>> Pins P9.5 and P9.6 are supposed to be connected to the DC power jack, >>>> as stated in the BBB System Reference Manual (figure 23, and explicit >>>> stated in page 113). So, I am using a external power supply at P9.1 ~ >>>> P9.2 >>>> as GND and P9.5 ~ P9.6 as +5V. The power led goes up but the board does >>>> not >>>> start to run and no other leds will blink. If I power up from DC jack or >>>> usb cable, everything goes as expected, so I ask if I am doing something >>>> wrong or should connect the other gnd pins. I double checked the >>>> connections and they are ok. >>>> >>>> Thanks, >>>> >>>> -- >>>> Carlos Novaes >>>> >>>> -- >>>> 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. >>>> >>> >>> >>> >>> -- >>> Gerald >>> >>> [email protected] >>> 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.
