Ogłoszenie

Zwiń
No announcement yet.

Problem booting brand new Carambola2

Zwiń
X
  • Filtr
  • Czas
  • Pokaż
Wyczyść wszystko
new posts

  • Problem booting brand new Carambola2

    Hi,

    I recently ordered and received 3 more Carambola2 (this being out third purchase, previously bought 2 then 10).Tonight I powered one up and it seems to be DOA.The FTDI USB serial is detected correctly by Linux but I had no output on ENTER or reset.In particular, I noticed that when pressing reset the green LED was not flashing on and off like normal.After some fiddling I started checking voltages etc. I had the negative multimeter lead on the shield, and noticed than sometimes (for a few times at least) I was able to get output on the serial port if I was pushing down on the shield. Further checking I discovered that the resistor on the reset line appears to be 2k7 not 4k7 as per the schematic. I also discovered that the voltage on GPIO 11 connected to the factory reset was @ 2.2V ?

    Please help.

    I didn't find the right solution from the Internet.

    References:-
    [url]https://www.8devices.com/community/viewtopic.php?f=13&t=770[/url]
    [url=https://blog.advids.co/20-great-animated-company-overview-video-examples/]Company Overview Examples[/url]

    Thanks
    Ostatnio edytowany przez Jammy; 29.03.2017, 11:35.
Pracuję...
X