arm-netbook

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1079 discussions

ARM device - compiling linux software
by Michael Howard 21 Jun '14

21 Jun '14

Looking for another ARM device to assist in software builds, has anybody got any recommendations for a capable board/device available in the UK? I have some softwares/packages (not mine) that are just not cross-friendly. Cheers, Mike. --

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status 16jun14
by Luke Kenneth Casson Leighton 16 Jun '14

16 Jun '14

jz4775 cpu card progressing, ddr3 crammed in, gigabit ethernet 80% done, about 25 components to still place, nand routing 95% done, PMIC 95% done, RGB/TTL routing 100% done, SD/MMC 98% done, planes/power lines 5% done. eoma68-a20, process initiated to get PCBs printed (handed over to someone else), likewise micro-desktop ic1 cpu card haven't looked at it in a week (busy with the jz4775), stands at about 60% done, needs a conversation with icubecorp. l.

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micro desktop
by Luke Kenneth Casson Leighton 15 Jun '14

15 Jun '14

http://rhombus-tech.net/community_ideas/micro_desktop/news/ as promised the micro desktop is being developed, news and features on the page. l.

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Re: [Arm-netbook] ARM device - compiling linux software
by Erix 14 Jun '14

14 Jun '14

> > Message: 2 > Date: Fri, 06 Jun 2014 20:13:57 +0100 > From: Michael Howard <mike(a)dewberryfields.co.uk> > To: arm-netbook(a)lists.phcomp.co.uk > Subject: Re: [Arm-netbook] ARM device - compiling linux software > Message-ID: <539212F5.7070608(a)dewberryfields.co.uk> > Content-Type: text/plain; charset=UTF-8; format=flowed > > > On 06/06/2014 12:27, peter green wrote: > > Michael Howard wrote: > >> Looking for another ARM device to assist in software builds, has > >> anybody got any recommendations for a capable board/device available > >> in the UK? > > I like the wandboard quad myself, able to run debian armmp kernels, > > seems to be reasonablly stable (i've been running the autobuilders for > > raspbian jessie on them for a while with only occasional crashes which > > I half suspect are due to my use of btrfs), has an a9 quad core > > processor, 2GB ram, SATA and serial console (full RS232 levels too so > > no need to mess arround with level shifters). I'm not aware of any UK > > stockists but mouser ship quickly and handle all the VAT/customs BS > > from their end so there are no nasty financial surprises on delivery. > > > > > http://uk.mouser.com/ProductDetail/Wandboard/WBQUAD/?qs=cF9QIdCP5siVNjY/ywr… > > > > > Hi Mike, First of all, I don't have your experience & skill, but there is something I don't understand. If you previsouly used Axx Allwinner platforms in the past for making your packages I presume you're mainly using this platform as "production" platform. So if you are turning now to a Wandboard that has a FreeScale processor how will you manage? Are you going to use cross-compiling technic? If so, how/what do you think of the Radxa mini board on thes matters? What is your opinion? It looks cheaper than the Wandboard? http://radxa.com/specification/ Sorry in advance if I'm "out of subject". Thanks in advance for your comments. Regards Erix

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[status] eoma68-a20 and micro-desktop
by Luke Kenneth Casson Leighton 13 Jun '14

13 Jun '14

ok thank you to two sponsors, we have enough to pay outright for the micro-desktop 1st prototype and part-way for the revised eoma68-a20 cpu card. one final check of the revised cpu card is needed (as well as waiting a little bit for some extra money) then it will be off to get the PCB checked and done etc. if anyone wants to take a punt on that they are more than welcome, i am planning to do just 5 but if anyone is happy to pay say.... $175 then you can have an early CPU Card with either 1gb or 2gb of RAM, it is your choice (and risk!). i will be getting 2 with 1gbyte and 3 with 2gbyte RAM done. l.

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Doubt about USB in EOMA-68.
by Miguel Garcia 13 Jun '14

13 Jun '14

Hi all, I've been looking at this: http://elinux.org/Embedded_Open_Modular_Architecture/EOMA-68#Table_of_EOMA-… Are all EOMA-68 obliged to have 2 USB 2.0 (the first on pin 30 and 64, the second on pin 34 and 68)? If in the future there is a EOMA-68 compatible with USB 3.0, would this USB 3.0 be associated with the first USB 2.0 or the second USB 2.0? We want to use the USB 3.0 to create a USB 3.0 port (with the current EOMA-68 only be compatible with USB 2.0, but we want to be compatible in the future with USB 3.0) and use the other USB 2.0 to connect internally the WIFI, the BT, the USB IC audio .... And we do not want that, in the future, some new EOMA-68 be incompatible with this because we have chosen the wrong USB. Thank you.

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quick update
by Luke Kenneth Casson Leighton 12 Jun '14

12 Jun '14

* jz4775 board layout looks feasible (just). have had to squash the DDR3 address lines as there are no wiggles, only straight routing on the dev-board, the DDR3 is hard against one edge and the CPU hard against the other,i have to ask ingenic to check * micro-pc needs another review * 2nd revision EOMA68-A20 still to go to PCB factory for gerber checks * IC1 PCB pretty much done component layout. v busy sorry short status. l.

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[status] eoma68-ic1t
by Luke Kenneth Casson Leighton 12 Jun '14

12 Jun '14

cpu cards being like buses, you wait for ages then 3 come along at once. i have been in touch with icubecorp, they have that awesome hybrid VPU/GPU/CPU core, and they decided to do a sub-$2.50 55nm 210-pin QFP out of it, running at 400mhz but quad-threaded. it's capable (on its own) of 720p video decode and 3D graphics *entirely* in software. the down-side is that this revision was designed as a low-entry android or embedded controller IC, so can only do up to 512mb RAM. they can do a respin but only with a large enough order. this will be one of the very first FSF-Endorseable CPU Cards and it will be the precursor to a more powerful version which we will do later. the BOM is something staggering like only $12 and that's including a SMC9514 USB-Ethernet Hub. it is juuuust about EOMA68 compliant and the only extra interface will be an SD/MMC card. it will boot from SPI NOR Flash so that will be deliberately very small (enough to hold a bootloader). l.

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Re: [Arm-netbook] RK* thingies are fairly cheap, indeed, but I managed to brick one
by Erix 10 Jun '14

10 Jun '14

> Message: 3 > Date: Mon, 09 Jun 2014 21:11:26 -0400 > From: Stefan Monnier <monnier(a)iro.umontreal.ca> > To: arm-netbook(a)lists.phcomp.co.uk > Subject: Re: [Arm-netbook] ARM device - compiling linux software > Message-ID: > <jwvk38pin90.fsf-monnier+gmane.comp.hardware.netbook.arm(a)gnu.org> > Content-Type: text/plain > > >> It looks cheaper than the Wandboard? > >> http://radxa.com/specification/ > > Does look neat and yes, does appear to be cheaper. Might take a punt on > one > > actually, see if it cuts the mustard. Thanks for pointing it out. > > The RK* thingies are fairly cheap, indeed, but I managed to brick one > with a simple "dd" from Android and still haven't managed to unbrick it. > >From that point of view the Allwinner ones are very friendly (since you > can boot from uSD even with a completely broken nand flash). > > > Stefan > > Hi Stephan, I don't know if it could help you, but the Radxa Team post a tip/advice to "unbrick" their platform in case it happens. http://wiki.radxa.com/Rock/unbrick Regards Erix

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A33
by Luke Kenneth Casson Leighton 04 Jun '14

04 Jun '14

On Tue, Jun 3, 2014 at 10:58 PM, Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > http://webcache.googleusercontent.com/search?q=cache:prYbhMDZblEJ:www.allwi… > > ok it's pin-compatible with the A23. with the removal of SATA and > replacement with USB it can be done. i'll ask for some PCB CAD files. > > l. > > On Tue, Jun 3, 2014 at 10:55 PM, Luke Kenneth Casson Leighton > <lkcl(a)lkcl.net> wrote: >> On Tue, Jun 3, 2014 at 10:14 PM, Paul NeoStormer >> <paulneostormer(a)gmail.com> wrote: >>> So I can't find the page where this was discussed but I was told that the >>> reason we couldn't go to a Quad-Core processor A31 was not because of pin >>> compatibility but because it utilized a different graphics processor which >>> we didn't really have open source for, a PowerVR instead of the Mali-400. We >>> today they announced the A33 which uses the same Mali-400MP2 that the A20 >>> uses, so is it possible to go to quad-core now? >> >> ooooo yes! hooray! if it's pin-compatible with the A20 we can use >> it straight away. ok just checked the A23 datasheet: it's only a 16-bit DDR3 RAM interface, one USB2 and one USB-OTG. so something like the 9514 USB-Eth hub would be needed (the 9512 apparently gets veery hot). also apparently A23 only addresses 1gbyte of RAM, we'll see if the A33 goes up to 2. about powervr, you want luc's talk about the state of software libre reverse-engineering of GPUs. it turns out he's worked (in a proprietary environment) with powervr, so he knows that it is an absolute god-awful mess (hardware and software wise). his recommendation is to let imgtec stew, and to not even attempt the reverse-engineering *at all*, it's that bad. l.

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