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<hramrach>
matteo_: if you want something like start/stop/upload file that should be fine. If you want something like print preview or realtime status that will probably need a more powerful SoC
<asdf28>
hramrach: you plug this UART module into the USB port of a PC? would that make it possible to use the PC's keyboard to type on the sunxi device?
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<montjoie>
a
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<hramrach>
asdf28: sort of. It sonnects to an uart port on the board, and u-boot typically uses an uart for serial console. Also note that these Chinese devices often come undocumented and you have to reverse-engineer what the chinese did with the chip or buy one from a vendor that knows electronics enough to provide description of the board. ALso the FT232 ones tend to have an obviousl voltage switch
<hramrach>
whereas the cp210x rely on the chip to somehow get it if you power it with 3.3v with either 3.3v and 5v boards - when wired correctly.
<Ashleee>
so I am trying to develop something and QEMU with aarch64 is the easiest way. But I am guessing that it still needs ATF to be compiled in? :)
<Ashleee>
to boot linux
<Ashleee>
with defconfig of uboot for qemu it doesn't start init
<mps>
iirc debian also made bootable iso image for aarch64
<Ashleee>
I am trying to make something that works over PXE (headless network booted stuff) so I wanted to developp directly by pxe booting from the start :)
<mps>
we have something like that in alpine linux but I never tried it
<insep_>
mps: perhaps you also have a script to setup alpine image for armv7 devices? ^^
<Ashleee>
I bet it defaults to something like 16MB RAM :D
<Ashleee>
yes :D
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<Ashleee>
thanks, I would not have noticed :P
<hramrach>
Ashleee: I would expect you can boot grub as teh first EFI binary over PXE, no need for u-boot when you already have EFI
<Ashleee>
allwinner has EFI built-in? :)
<hramrach>
qemu does
<Ashleee>
qemu is just for dev, the real target is actual allwinner/.. aarch64
<Ashleee>
yeah
<mps>
insep_: I think also I have updated script but didn't put it on site yet
<Ashleee>
so I want the target to be as close as possible
<hramrach>
I see, you don't want the default qemu board but actual hardware emulation
<Ashleee>
yeah
<Ashleee>
well
<Ashleee>
anything really :)
<mps>
I think arm64 supports efi but not arm32
<hramrach>
either supports efi
<Ashleee>
I mean the kernel will be tied to the hardware anyways, the rest is universal armv8
<mps>
hramrach: aha, so I should try armv7 with efi boot
<hramrach>
well, then with actual hardware you first load u-boot and then grub from u-boot, and then kernel and ramdisk from grub. Without grub it does not work for me
<hramrach>
and u-boot can load grub from tftp quite fine
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<hramrach>
mps: yes, EFI emulation in u-boot makes things much easier for distributions. All hardware is basically the same then
<mps>
hramrach: thanks, I remember that I read something about that but didn't ever considered it
<hramrach>
some boards camo with SPI NOR so you can write u-boot there and you have eterprise-class hardware with native EFI support :->
<insep_>
mps: thaaaaaanks
<hramrach>
the EFI support kind of sucks if you do not have serial console, though. graphics is too complex and prone to breakage
<mps>
insep_: np :) also you help me with n900
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<insep_>
mps: and you me with kernel :P
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<mps>
we all are on channels to help each other
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<asdf28>
hramrach: phew that sounds complicated. and the use of the module is limited to uboot? or can you do other things with it?
<hramrach>
asdf28: typically you ca set up serial console in the kernel as well
<hramrach>
it's actually the simplest way to communicate with a board but people are used to USB kerboards and such
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<asdf28>
i don't have an usb keyboard so that would be useful
<asdf28>
does anyone still use the old 3.4 kernel? what do you use it for?
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<KotCzarny>
android, ofc
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<bauen1>
from the short view i gave the h5 sbrom sha256 software implementation it looks good, at least the constants have the right values, it also appears to do length checking correctly
<montjoie>
asdf28: 3.4 is evily too old stay away of it
<hramrach>
it's ok if you can pay a few people to backport fixes to it ;-)
<montjoie>
money can be better spent
<hramrach>
usually forward-porting the drivers to mainline works out better
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<asdf28>
yes it's old but at least the graphics and audio was working, and the documentation in the wiki was good
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<KotCzarny>
old kernel blobs are buggy
<KotCzarny>
and the main reasons to moving forward was the poor state of the drivers (no matter open or not)
<hramrach>
yes, you might get graphics and audio working but everything else is buggy because you get ancient unmaintained kernel
<asdf28>
well it might be because i started with the newer kernels when they were not yet working properly, and then moved back to the old kernel and was amazed that everything worked right out of the box
<asdf28>
especially the graphcis driver situation was very confusing
<karlp>
they've neglecteds the pictures of final results and installation/usage instrucntyions of course...
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<gediz>
oh that looks really cool
<gediz>
i wish i've seen it before, even though DE2 of H3 is much superior than DE of A13
<gediz>
I actually want to document it but I'm not sure if it'd really give any benefit to anyone. because A13 is pretty old, you know. it's also something really specific. unnecessary for most people even
<JohnDoe_71Rus>
a13 is new r8
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<matteo_>
hramrach: there isn't going to be something havy like a realtime model of the 3D print, if that's what you mean
<matteo_>
hramrach: more like a fancy printer UI (think of one of those GUIs you have on office printer/scanner/copiers)
<JohnDoe_71Rus>
I would like to update the firmware of the A13 tablet. Some kind of android go. dreams...
<willmore>
Yeah, montjoie, not finding any cp210x here at all. Lots of ch340 and pl2303.
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<bauen1>
it also seems quite likely that allwinner is using arms cryptocell library for the crypto engine, embedded crypto engine and security id, the descriptions from arm match the features provideded quite closely
<bauen1>
but arm has all the documentation behind a login/nda wall
<karlp>
is it not just the generic arm login? is it really a special one?