<skiboy>
Now that even kids toys run on general purpose architectures, we can run general purpose OSes on them
<skiboy>
I'm waiting to build a beowulf cluster out of speak-n-spells
<skiboy>
or furbies
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<miasma>
skiboy: probably mindstorm blocks have better computing power than rpi? :)
<beeble>
sitara am1808
<beeble>
so no
<miasma>
oh
<miasma>
i'm getting sick of all rpi cluster thingies. they built this computing module for um.. computing task. still people build clusters out of rpi zero and normal rpi1-3 boards
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<elvirolo>
hi all
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<skiboy>
hello
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<wens>
miasma: you need to build a decent baseboard for the module
<skiboy>
That's the downside
<wens>
which might get expensive, and negates the fun of building things :p
<wens>
it's more suited for building a product around it
<skiboy>
In non-bulk circumstances, it's more efficient just to use the basic boards
<elvirolo>
I'm trying to flash a BIOS chip with an Olimex Lime2, using Armbian 5.35 (Debian stretch, kernel 4.13.16), but can't get flashrom to detect it. I get positive results from spidev_test with a loop from MOSI to MISO though. I was wondering whether it could be power related. Does the 3.3V pin need to be "enabled"?
<wens>
duh, you have to provide power to the flash, how else would it work
<skiboy>
But if you're going to build a mass-produced product, it would probably be cheaper to design a board with an allwinner chip or something
<skiboy>
you can get them in bulk pretty cheaply on alibaba
<skiboy>
vs the $30 cost of a compute module
<elvirolo>
wens: The chip is connected to the 3.3V pin.
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<wens>
seems its the same 3.3V providing power to everything else, so you should be good there
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<elvirolo>
ok thanks
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<guest22222>
hi everyone
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<guest22222>
Anyone knows where can I find any detailed info about USB-OTG for R40? I mean registers list, any description?
<guest22222>
because there is no much info about OTG in original spec
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<wens>
BSP kernel
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<guest22222>
seems like it is MUSB (Mentor) controller, am I right?
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<wens>
yes
<guest22222>
ok, thanks wens
<wens>
icenowy[m]: IIRC you had USB patches for R40?
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<icenowy[m]>
wens: yes for host
<icenowy[m]>
the dt part merged
<icenowy[m]>
the phy driver part... ah... the maintainer says applied but he forgot it in fact
<icenowy[m]>
otg on r40 works strangely
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<wens>
lol... thing with inline assembly for smp code is you need to test it in thumb mode as well :(
<wens>
broke as expected :/
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<willmore>
Oopsie.
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<wens>
and the nice THUMB macros can't be used in inline assmebly (the header that defines them doesn't like it)
<wens>
means I have to do an extra assembly file just for two simple entry functions :/
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<wens>
hmm...
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<Pe3ucTop>
Hello to all, question about stability on Battery ? What happens when battery level go lower than 3V3 or even 3V0 ?? How stable is PLL which work from 3V0 ?
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<argulp>
Hello
<argulp>
Anyone know if Orange PI PC microphone (H3) is working with the mainline kernel 4.15 ?
<argulp>
seems detected but no sound from my side
<Pe3ucTop>
argulp: is your alsamixer configured ? Is Mic selected for recording ??
<argulp>
yes it seems to be the case
<argulp>
(but using mainline kernel... alsamixer output is quiet strange)
<willmore>
Pe3ucTop, the only thing that cares about battery voltage is the PMIC.
<BenG83>
Pe3ucTop, which hardware?
<Pe3ucTop>
willmore: but if PMIC is not possible to provide enough voltage ? by idea PMIC need to turn off/reset system, but Battery is still with some % power.
<BenG83>
which AXP are we talking about?
<Pe3ucTop>
BenG83: not cleary defined CPU , but yes AXP209 and Alwiiner (let's it be A13 or other ones) ...
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<Pe3ucTop>
I'm interested to use battery for full cycle from 100% to 0% , by ide battery than will go under 2.9V
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<BenG83>
VCC PLL is an LDO
<BenG83>
so it depends how you supply it's inuput voltage
<Pe3ucTop>
but most schematic use LDO/Buck for 3V PLL and 3.3V IO ..
<Pe3ucTop>
So question is still actual, if PLL voltage goind down, to 2.9~2.5V will Allwinner CPU continue to work correctly ??
<BenG83>
that question is usually answered by the datasheet
<BenG83>
the reference designs usually just say you have to apply battery voltage >3.5V
<BenG83>
so you might have to add an additional boost converter that can be reverse fed to enable charging
<BenG83>
to go down to 3.0V
<BenG83>
but for example the Pinebook's 10Ah battery already doesnt deliver enough power at 3.2-3.3V
<BenG83>
depends on how your discharge profile looks I guess
<BenG83>
and what size of battery you envision
<BenG83>
AXP is not really suited for larger packs
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<Pe3ucTop>
BenG83: Thanks, for answers. Battery going to be single element 18650 , so ~2.2Ah ..
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<Pe3ucTop>
And looking for solution to get maximum working time out of it.
<BenG83>
some AXPs dont even have battery support
<wens>
sounds like a really bad idea
<wens>
li-ion batteries shouldn't be fully discharged
<willmore>
And a small 2.2Ah cell isn't going to last very long at that discharge rate.