[Gta04-owner] Status GTA04A5 - unplanned Xmas present!

Frank Gau fgau at gau-net.de
Thu Dec 22 21:22:06 CET 2016


as an old gta02 user I only say wow!

very good work. merry christmas! (a silent ml reader)


On Thu, Dec 22, 2016 at 07:01:32PM +0100, H. Nikolaus Schaller wrote:
> Hi,
> today I received a phone call from the production company
> that they will close tomorrow up to first week of January.
> 
> But they had a little spare time to run another attempt
> to build our GTA04A5 boards using the redesigned stencil.
> 
> So they had already populated one panel (4 PCBs) and I
> could come to have a look at the X-Ray.
> 
> Now, being back from the visit, here are the first good news:
> the X-Ray of the PoP chip looks perfect!
> 
> Then we ran an AOI (Atomatic optical inspection) which
> revealed one missing component, one rotated and one
> additional. That happens from time to time.
> 
> There was another mistake - two SOT23-5 chips were swapped.
> 
> After fixing all this I did the standard measurements with
> the Smart Tweezers and for the first time, there were no
> short circuits to find!
> 
> I had taken the SD card from previous experiments and a
> GTA04 battery with me, but unfortunately none of the LEDs
> did light up :(
> 
> So I took the panel home with mixed feelings and connected
> the RS232 cable to the first board.
> 
> And voila, the DM3730 starts, but breaks into U-Boot console
> so that the LEDs are not controlled by our boot.scr! The
> problem seems to be the IrDA receiver which is not turned
> off by MLO. But that can be fixed in software.
> 
> Then I simply typed "run bootcmd" and Linux got up and
> running!
> 
> I could play around a little to find out that the 3G modem
> can be turned on and reports IMEI and status. And the WiFi
> chip is also found.
> 
> All this are things I wasn't able to test so far.
> 
> Then I connected a display and made a short video:
> 
> 	https://youtu.be/JrLN8zHmuxQ
> 
> Phew - it seems to work!
> 
> Now I am looking forward to the real production run in
> January. Then we finally will be able to ship the GTA04A5
> boards and complete L2804 devices.
> 
> Thanks for your patience, have nice holidays and a happy
> new year,
> 
> Nikolaus
> 
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-- 
sent with 100% wireless electrons


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