[hpsdr] SOLVED Re: Homebrew Hermes startup problem

[Oliver Goldenstein]

Hi All !

And thanks for your replies. The FPGA was in best order. Guess what ?

A missing solder joint at R74 :-)

little Hermes was alive the whole time.

73 Oliver DL6KBG



On 4 February 2013 10:40, Oliver Goldenstein
<oliver.goldenstein at gmail.com>wrote:

> Hello All !
>
> I finished my hombrew built of a Tapr Hermes board early sunday morning.
>
> After a first power up, the board draws about 0,2 Ampere. (The Powermeter
> has no better resolution) All power supplies are ok and the relevant power
> leds are glowing. No lights on the staus leds.
>
> I then tried to program the bootloader with active serial programming and
> an Entner EEBlaster (USB Blaster compatible). The power at P1 and P2 is
> there. I can program, erase, blank check and the Quartus Programmer reports
> the Silicon id as 0x14.
>
> But nothing happend after a powercycle.
>
> The same is valid for JTAG programming. I programmed the hermes.sof file
> succesfully to the board. the JTAG Chain debugger reports a user programmed
> FPGA.
>
> I had it running two times from lets say about 50 tries. All status leds
> flashed like they should and i was able to read the config via the
> HPSDRProgrammer and also cuSDR was able to find the board. Power was about
> 0,6 Ampere then.
>
> I had a problem using my stencil during the build and had some poor solder
> joints at the FPGA. I think i will go debug connection for connection and
> measure the relevant lines.
>
> It seems, that the FPGA does not come out of his legs (has startup
> problems).
>
> Any more suggestions. Otherwise i will debug the hardware tonight.
>
> Many thanks in advance.
>
> 73 Oliver DL6KBG
>
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