arm-netbook

arm-netbook@lists.phcomp.co.uk

8 participants
1076 discussions

Wook belatedly joins the party
by Wookey 22 Nov '13

22 Nov '13

OK, so I got an MEBv2 eventually a week or so ago, and with some help from phil hands at the mini-debconf last week proved my card would boot, then we built suitable uboot, and tools and have just faffed about soldering serial header, serial cable, power cable up and sorting out level shifters, but now I can boot and get serial. Woo! Now I just need to sort out rootfs and kernel, solder on IO header, suitable sata connector and I can work on something useful like debian installer support. So, I have to fit htis in round way too many other things, but hope to at least contribute a bit now. Wookey -- Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM http://wookware.org/

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AMD 2W APU
by luke.leighton 21 Nov '13

21 Nov '13

http://www.amd.com/us/press-releases/Pages/amd-2014-mobile-apu-2013nov13.as… at laaaast.

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HDMI variant low profile ethernet socket
by joem 20 Nov '13

20 Nov '13

Hi, Luke/Aaron, you need to get some shoes on and go make a mini HDMI connector that is a little bit smaller (so as to prevent it being used as a video connector) and use it as ethernet connector. Notice all the tablets out there don't have physical ethernet? For lack of a decent substitute ethernet connector that is thin enough to go on a tablet. It could be designed so that future EOMAs could have it and so too should the Plasma Active tablets. And thin stacks of future server boards. You guys need to use your industrial contacts and muscle and go pull some strings to make it happen. The alternative is I go make it in mini-HDMI size and just make cable adapter (which will lead to confusion). I'm sure my adventure will end in tears and a sorry mess but it be better than nothing. HDMI has at least 4 tx/rx pairs and a lot more - just use the tx/rx pairs only and its good enough to get gigabit ethernet. The ethernet magnetics chip is very small these days costing under $1, so the overall solution could fit inside an EOMA. There is some standard out there milling around to support ethernet through HDMI, but I don't fancy that as a better solution than a low profile dedicated ethernet connector long overdue for the tablet market to replace the bulky RJ connector.

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rs232 level shifters
by luke.leighton 19 Nov '13

19 Nov '13

https://www.sparkfun.com/tutorials/215 in the end i went with this for the router, using an IMD2A for the two transistors.

3 6

router layout almost done
by luke.leighton 18 Nov '13

18 Nov '13

http://rhombus-tech.net/community_ideas/router/news/ quick update. a few more tasks and this PCB will be pretty much ready to go. it's far less complex and much less space-intense than the tablet PCB (which could only be single-sided). a few scary areas like the GbE routing. there will be plenty of stitching vias to earth that lot... l.

1 0

eoma68 router pcb
by luke.leighton 18 Nov '13

18 Nov '13

http://rhombus-tech.net/community_ideas/router/news/ uh... am i reading this right - that this router design could be up to 20 watts?? 4x USB2 @ 500mA (10W), 1x RTL8366 (3W) and an EOMA68 CPU Card (4W). That's.... a hell of a lot. anyone any experience at dealing with that much power on small boards (4 amp @ 5V) ? l.

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SPDIF on EOMA68 A20
by Miguel Angel Ochoa Rodriguez 13 Nov '13

13 Nov '13

Dear OEMA68 developer community . We are a team of Spanish engineers who are developing a Home Cinema -Media Center to integrate XBMC on Linux on a modular concept . We thought we had EOMA68 use platform for our project. But note that not included SPDIF output included in the CPU to one of the GPIO outputs as expecificacion see that the original is not contemplated. We think that in a Media Center is mandatory to have a SPDIF connection because sometimes only play music and it is interesting to connect the audio DAC you have, no need to convert from HDMI . My question is .. The EOMA68 espeficicaciones the A- 20 are closed or else you could ask implement this output to a GPIO ?? - In event of failure to implement GPIO , I noticed that the photos of the first prototype boards last is eliminated auxiliary bus had on top . It would be possible to go back on the design some kind of signal SPDIF auxiliary bus and maybe some other CPU signal discarded but interesting in specific applications .??? Sincerely Miguel Ochoa Industrial Electronics Technician

5 9

apologies
by luke.leighton 13 Nov '13

13 Nov '13

apologies to everyone on the list - you may have noticed i'm using brief and curt language at the moment. it's not personal: i just have far less time available and have to be very focussed. l.

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Re: [Arm-netbook] update to EOMA68 specification [was Re: 5" LCD resolution 800x480 working for EOMA but color problems may exist because of miswire]
by luke.leighton 11 Nov '13

11 Nov '13

this is not a miswire. the specification has now changed to reflect what cannot now be changed. l. On Sun, Nov 10, 2013 at 1:15 PM, luke.leighton <luke.leighton(a)gmail.com> wrote: > On Tue, Nov 5, 2013 at 12:43 AM, joem <joem(a)martindale-electric.co.uk> wrote: >> Hi, >> >> 5" LCD resolution 800x480 working for EOMA. >> Details here >> http://www.gplsquared.com/eoma_boot/eoma_boot.html#eoma_with_5inch_lcd >> These displays are about $16 from Aliexpress: >> http://www.aliexpress.com/item/5inch-5-TFT-LCD-LCM-RGB-800-480-Display-TOUC… >> >> I still notice a problem with color - Red and Blue appear to be swapped. > > ok. the specification's going to have to change. we cannot modify > the CPU Card, so the spec has to be changed to match the card. what a > pain. > > l.

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[flying-squirrel] revision 3 pcb gerbers off to factory for inspection
by luke.leighton 10 Nov '13

10 Nov '13

http://rhombus-tech.net/community_ideas/kde_tablet/news/ the gerber files have been sent to the factory. if they're acceptable the PCB will be printed up. l.

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