[Tinkerphones] Status GTA04A5 - unplanned Xmas present!

Andrew Schenck andrew at springahead.com
Thu Dec 22 22:24:24 CET 2016


On 12/22/2016 10:01, 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!

This is wonderful news, Neo900 has been somewhat delayed and my old 
GTA04A4 is pretty worn out so if I can scrape together some extra money 
I'll put down a pre-order for the A5.

-Andrew
> 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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