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
On Thu, Nov 21, 2013 at 11:16 PM, Wookey wookey@wookware.org wrote:
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.
You should take a look at sunxi.org, in particular http://linux-sunxi.org/FirstSteps
Wookey
Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM http://wookware.org/
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On Thu, Nov 21, 2013 at 10:16 PM, Wookey wookey@wookware.org wrote:
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.
hooraay!
So, I have to fit htis in round way too many other things, but hope to at least contribute a bit now.
awesome. here's where i'm recording notes: http://rhombus-tech.net/allwinner/a20/boot/
i'm up to here: c3d9fb5b19f9c2b5b605cf24c65347b5d426bd16 that's on http://git.rhombus-tech.net/?p=linux.git - ask phil to add you to the repos ok? i should have a sunxi-3.4 branch created by the time you read this.
the last tag i used was 3.4.61 from the linux-sunxi repo:
commit 5edd4887d25fa826905d8a7a8ceab09c2c82baf6 Merge: 6554b8c 58055a0 Author: Alejandro Mery amery@geeks.cl Date: Thu Sep 12 14:21:32 2013 +0200
Merge tag 'v3.4.61' into reference-3.4
This is the 3.4.61 stable release
and the notes above have a link to the eoma68-a20 config i used when compiling that. the other thing you have to watch out for is that you'll need a script.fex file - it's the allwinner equivalent of "device tree" and it's a fuck of a lot simpler. DOS ini file format for a start. you'll need to grab the allwinner-tools so you'll have fex2bin and bin2fex - i don't cross-compile them i install them native on the CPU Card :)
l.
oh btw we worked out that the SATA connector is the wrong bloody way round. this can be sorted by getting .... yet another SATA connector and soldering it on *top* of the existing one - don't remove the existing one it's a pain in the neck to take off. you've got only a couple of mm variation tolerance in the length of the diff pairs to play with so keep the 2nd connector as symmetrical as you can get it when soldering on top.
alternative: start cutting up SATA cables... blegh.
l.
Sent from my iPhone
On Nov 21, 2013, at 5:03 PM, "luke.leighton" luke.leighton@gmail.com wrote:
oh btw we worked out that the SATA connector is the wrong bloody way round. this can be sorted by getting .... yet another SATA connector and soldering it on *top* of the existing one - don't remove the existing one it's a pain in the neck to take off. you've got only a couple of mm variation tolerance in the length of the diff pairs to
His version has the SATA and all other components properly attached. :) no need to modify anything.
play with so keep the 2nd connector as symmetrical as you can get it when soldering on top.
alternative: start cutting up SATA cables... blegh.
l.
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+++ Christopher Thomas [2013-11-21 18:04 -0600]:
Sent from my iPhone
On Nov 21, 2013, at 5:03 PM, "luke.leighton" luke.leighton@gmail.com wrote:
oh btw we worked out that the SATA connector is the wrong bloody way round. this can be sorted by getting .... yet another SATA connector and soldering it on *top* of the existing one - don't remove the existing one it's a pain in the neck to take off. you've got only a couple of mm variation tolerance in the length of the diff pairs to
His version has the SATA and all other components properly attached. :) no need to modify anything.
Well. I'm sure the tracks are the right way round but I only have pads not a physical connector. This part: http://cpc.farnell.com/jsp/search/productdetail.jsp?id=CN15466&Ntt=CN154... doesn't fit. (earth holes don't have the right offset). And what does that (REVERSE) mean? I'm waiting for this: http://cpc.farnell.com/molex/47080-4005/plug-sata-system-r-a-smt/dp/CN15476?... to see if it's any better.
knowing the right part for the PCB that would be helpful.
Similarly with the 44pin 2mm SMD header. I'm guessing that http://uk.rs-online.com/web/p/pcb-headers/6701125/ or http://uk.mouser.com/Search/ProductDetail.aspx?R=98424-G52-44LFvirtualkey649... will do the trick.
Although ~3 quid in both cases seems a little steep. (and 6 or 12 delivery respectively)
Wookey
Sent from my iPhone
On Nov 21, 2013, at 8:21 PM, Wookey wookey@wookware.org wrote:
+++ Christopher Thomas [2013-11-21 18:04 -0600]:
Sent from my iPhone
On Nov 21, 2013, at 5:03 PM, "luke.leighton" luke.leighton@gmail.com wrote:
oh btw we worked out that the SATA connector is the wrong bloody way round. this can be sorted by getting .... yet another SATA connector and soldering it on *top* of the existing one - don't remove the existing one it's a pain in the neck to take off. you've got only a couple of mm variation tolerance in the length of the diff pairs to
His version has the SATA and all other components properly attached. :) no need to modify anything.
Well. I'm sure the tracks are the right way round but I only have pads not a physical connector.
That should not be the case, I sent you an email off list.
-C
This part: http://cpc.farnell.com/jsp/search/productdetail.jsp?id=CN15466&Ntt=CN154... doesn't fit. (earth holes don't have the right offset). And what does that (REVERSE) mean? I'm waiting for this: http://cpc.farnell.com/molex/47080-4005/plug-sata-system-r-a-smt/dp/CN15476?... to see if it's any better.
knowing the right part for the PCB that would be helpful.
When we launch the final MEB, all files and BOMs will be available to the public. Right now we're still transitioning components and do not want multiple BOMs in the wild potentially confusing things.
Similarly with the 44pin 2mm SMD header. I'm guessing that http://uk.rs-online.com/web/p/pcb-headers/6701125/ or http://uk.mouser.com/Search/ProductDetail.aspx?R=98424-G52-44LFvirtualkey649... will do the trick.
Same as above.
Although ~3 quid in both cases seems a little steep. (and 6 or 12 delivery respectively)
Wookey
Principal hats: Linaro, Emdebian, Wookware, Balloonboard,
-Christopher
On Fri, 2013-11-22 at 09:00 +0000, joem wrote:
His version has the SATA and all other components properly attached. :) no need to modify anything.
keebler FYI: if you sent me MEBv2, I still not receive.
keebler I meant latest MEB, but not to worry - if others need it send to them as I have 2 of the very first batch all working :)
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Arokux X -
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luke.leighton -
Wookey