gmane.comp.hardware.netbook.arm

Re: eoma68 a10 progress

luke.leighton — 2013-05-18T10:23:04

http://dl.linux-sunxi.org/users/niall/debian/

ooo, look what i just found - deeebian paaaackaageeees :)

Re: eoma68 a10 progress

Henrik Nordström — 2013-05-18T07:44:18

fre 2013-05-17 klockan 21:03 -0500 skrev Ken Phillis Jr:

It's connected in the schematics so should be ready for testing.

Regards
Henrik

Re: eoma68 a10 progress

Ken Phillis Jr — 2013-05-18T02:03:12

This is good to know... Anyways, Do you know if the board has the CEC
connection wired up and ready for testing? The linux-sunxi.org website
says that *all* A series chips ( except for the A13) has full support
for HDMI CEC.

For information on using this, see...

http://linux-sunxi.org/HDMI_CEC_%28Consumer_Electronics_Control%29

Re: eoma68 a10 progress

Ajith Kumar — 2013-05-18T01:31:39

i accidentally ended up with 2 boards again: one of them turned out be


Great, congratulations Luke.

ajith

eoma68 a10 progress

luke.leighton — 2013-05-18T01:10:30

well, with henrik's help and from hglm on #sunxi i got hdmi up and
running on-screen, so this is great news.  i'll do some cute pictures
tomorrow.  also i'll try a board-bring-up of the flying squirrel
tablet, that has to be done with some care so i'm likely to leave it
till sunday.

i accidentally ended up with 2 boards again: one of them turned out be
damaged, which is the likely cause of the hassle in booting with
livesuite: its HDMI has gone off-line as well (can't read the i2c
hdmi).  the 2nd one however works fine.  all the attempts of the past
2 days to get hdmi working, i put the sdcard into that one and it came
up with an on-screen debian prompt immediately.

ah it's all good fun :)

l.

Power consumption of A10/A20/A31

Stefan Monnier — 2013-05-16T13:49:40

Is there some info somewhere about the power consumption of those SoCs?
Not in terms of max power to plan for when designing a machine, but
rather consumption in various scenarios (e.g. when idle).


        Stefan

Re: a10 eoma68 cpu card bring-up

Henrik Nordström — 2013-05-16T09:41:08

tor 2013-05-16 klockan 11:18 +0200 skrev Oliver Schinagl:


Somehow I doubt there exists any proper docs for it..

Regards
Henrik

Re: a10 eoma68 cpu card bring-up

luke.leighton — 2013-05-16T09:37:43

On Thu, May 16, 2013 at 10:18 AM, Oliver Schinagl
<oliver+list< at >schinagl.nl> wrote:

 yeah good point.  i've requested GPL source code, see how far that gets.

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Re: a10 eoma68 cpu card bring-up

Oliver Schinagl — 2013-05-16T09:18:08

or at the very least proper docs so the mtd driver can be made to work.



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Re: a10 eoma68 cpu card bring-up

luke.leighton — 2013-05-15T21:07:19

debian sd-card armhf boot from usb-fel!

flying squirrel 1st revision pcb with components

luke.leighton — 2013-05-15T20:30:11

http://rhombus-tech.net/community_ideas/kde_tablet/news/

arrived today, the goal is to use this to do the STM32F programming.
which will be _mostly_ correct for when the 2nd revision arrives :)

l.

Re: a10 eoma68 cpu card bring-up

luke.leighton — 2013-05-15T16:26:34

On Wed, May 15, 2013 at 5:20 PM, Henrik Nordström
<henrik< at >henriknordstrom.net> wrote:

 ooo.  ouch.  ok.  thanks.

 l.

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Re: a10 eoma68 cpu card bring-up

Henrik Nordström — 2013-05-15T16:20:37

ons 2013-05-15 klockan 15:01 +0100 skrev luke.leighton:


Make sure to negotiate access to the NAND driver source if you plan on
an A20 design with NAND. So far only binary blobs have been seen.

Or.. that's actually a damn good argument why go for a top-loaded µSD
instead of NAND, or eMMC module if you don't want to do the case work
right now for a top-loaded µSD.

Regards
Henrik


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Re: a10 eoma68 cpu card bring-up

luke.leighton — 2013-05-15T14:51:55

On Wed, May 15, 2013 at 3:23 PM, mike.valk< at >gmail.com
<mike.valk< at >gmail.com> wrote:


 yeahhh, space. (height)


 it's not that: there's not enough height.  low-cost 6-layer PCBs come
in at 1.2mm - if you go to 0.8mm it's quite a jump (relatively
speaking).  MicroSD card slots are 1.9 to 2.0mm, so that's 5.2mm in
total, and PCMCIA casework is 5.0mm meaning you only have 4.8mm to
play with and also need some clearance top and bottom for a plastic
end-plate.

 as it is we're looking at 4.8mm - 3.2mm = 1.6mm divided by 2 is 0.8mm
above and below (for plastic!) so it's real tight.


 yep that's it.


 correct. now you need a hole in the top casework, and that's
around.... $5k to $10k for the development and tooling because it's
custom tooling.

 all these things that need to be taken into account, it's a bloody
miracle we got this far on such a small budget!

l.

Re: The Potential at Hand. (Was: device tree not the answer in the ARM world)

luke.leighton — 2013-05-15T14:45:55

On Wed, May 15, 2013 at 3:15 PM, Oliver Schinagl
<oliver+list< at >schinagl.nl> wrote:


 http://i.usatoday.net/news/opinion/cartoons/2009/December/e091207_pett.jpg

 thanks oliver.  vladimir, two people have helped to answer.  does
that make it clearer for you?

 l.

Re: a10 eoma68 cpu card bring-up

2013-05-15T14:23:12

2013/5/15 luke.leighton <luke.leighton< at >gmail.com>:

I thought to put it on the bottom side of the outside facing side.
We're using two midmount connectors and a top mount micro-sd.

      MicroSD
-HDMI---------USB-
      MicroSD

I know very simplistic though, I understand that the PCB is crowded
with traces already.


Sorry I did ;-). I assumed solder pads for JTAG/UART on the board.


Applause. Good job indeed.


Someting like this you mean?
http://static.videomaker.com/sites/videomaker.com/files/styles/vm_image_token_lightbox/public/articles/15633/micro-sd-card-in-cell-phone.jpg?itok=jd9JlrmU

That whould indeed make more sense for an SD card with the OS. Which
you don't want to accidentally eject while running.

Re: The Potential at Hand. (Was: device tree not the answer in the ARM world)

Oliver Schinagl — 2013-05-15T14:15:25

How so? I think this is also exactly what the EOMA-68 is after.

Lets assume Vladimir only plays legally obtained DVDs, doesnt care about 
Blu-ray or whatever is the new fad and is happy with its resolution. But 
having a swapable CPU card, would allow this fine DVD player to live 
even longer. Swap out the old 200 MHz DVD player dedicated card (if it 
would have  had that) and put in the new 1 Ghz A10 card. With a mini-USB 
wifi dongle, you now have a DVD player that can also browse the web. 
Stream media from the network or simply playback burned dvds with a 
various amount of codecs, so that new high-res tv that you got, can be 
usefull with your same dvd player.

So yes, I even see potential here. TO me, I think back when you first 
had those DVD players that had USB ports on it, that could playback 
divx, but nothing much after that.

Granted however, a DVD player can be had for 25 euros these days so that 
might be a bad example.

But if you look at really  old  stuff, I see a lot of devices that have

Re: a10 eoma68 cpu card bring-up

luke.leighton — 2013-05-15T14:01:00

On Wed, May 15, 2013 at 2:46 PM, mike.valk< at >gmail.com
<mike.valk< at >gmail.com> wrote:

 only by accident.


 yes.  except that requires case rework, which will be an extra $10k.


 because they wired the wrong fucking SD card interface *without*
notifying me.  did i say "don't ask"? :)

 it's actually for very very good reasons, namely that the board's
been designed extremely well - 2 GND planes, 1 Power meaning it stands
a high chance of passing FCC - but it's leaving only 3 signal planes.

 so, only 3 signal planes for 4 DDR3 RAM ICs, processor, PMICs, NAND
Flash, MicroHDMI, MicroUSB, MicroSD and a 68-pin connector in a space
only 45 x 75 mm it's a goddamn miracle the engineer pulled that off -
he's extremely competent in that regard.

 so they couldn't route SD0 to the MicroSD because it was on the other
side of the CPU, likewise SD3 would have crossed over.  so the
engineer made a very sensible decision to swap them over... but didn't
_tell_ me.

 and i'd already truncated the GPIO pins from 16 to 8, which c

Re: a10 eoma68 cpu card bring-up

2013-05-15T13:46:12

2013/5/15 luke.leighton <luke.leighton< at >gmail.com>:

Congratulations Luke, et al.


Err. Not even a serial (UART) interface?

Suggestion for the next iteration of the board. Add an extra micro-sd
slot. Some of the benfits.
1. Boot from removable storage. While keeping a swappable storage available
2. Less wear on the soldered on flash
3. The A10 can expose UART and JTAG via the sd interface
http://linux-sunxi.org/MicroSD_Breakout

Ehm why aren't you trying UART/JTAG over the SD-Card interface now anyway?

Re: a10 eoma68 cpu card bring-up

luke.leighton — 2013-05-15T12:32:06

 thanks ajith.

Re: a10 eoma68 cpu card bring-up

luke.leighton — 2013-05-15T12:05:00


 still am going through repro'ing henrik's kernel compile, all good
fun because this revision of the board doesn't have JTAG.  don't ask.
really.  just... don't ask :)

 so, it is "blind" testing.  "did it work?" no, make one change and/or
eliminate differences.  recompile.  "did it work?" no, try something
else with less changes.  repeat until success.  patience....

l.