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<tzafrir_laptop>
The mk802 boots fine from the same SD card (yey!). The Uhost device fails to show anything on the display if booting from the SD
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<ZaEarl>
Any idea how many installs nand can handle? I'm flashing so many roms to my tablet I'm concerned I'll wear out the nanda.
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<Turl>
lundman: around?
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<destinal>
mnemoc: trick to get VGA without support for it on the chip? is this hack documented somewhere?
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<rm>
Rikomagic have removed all firmware downloads from their site
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<orly_owl>
the firmware was non-free?
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<mnemoc>
destinal: in olimex's blog
<destinal>
mnemoc: hmm do they talk about it at all or just the line that says "We will continue with the VGA tweaking tomorrow as the normal VGA monitor do not sync at 800×480 pixel default Android LCD settings :) "
<mnemoc>
tzafrir_laptop: there cnxsoft says how to open it
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<tzafrir_laptop>
mnemoc, and what I gather from it is that a serial connector will require soldering
<mnemoc>
tzafrir_laptop: I missed the "update" of those pins been usb instead of uart :<
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<tzafrir_laptop>
anyway, after opening the case (just the top plastic, without 4 screws)
<tzafrir_laptop>
I now finally managed to get it to display on the screen
<tzafrir_laptop>
I guess it needed some air
<tzafrir_laptop>
or whatever
<mnemoc>
:)
<rm>
sometimes you just have to reinsert the SD card
<rm>
had that once or twice even with my 'good' mk802
<CIA-122>
rhombus-tech: Kent master * ra1ddb0748b54 /allwinner_a10/orders/nielsek.mdwn:
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<tzafrir_laptop>
Rants aside, it's great to have such a device easily boot from an alternative media
<tzafrir_laptop>
and many thanks to all those who made it possible
<rm>
that would be Allwinner
<rm>
U-host is nothing special in this regard
<tzafrir_laptop>
Well, quite some effrt was needed in order for me to have a simple image to have on my SD card
<coolhp>
Good morning all.
<coolhp>
Do you need a particular "firmware" or revision of the MK802 in order for u-boot to work ? If I dump one of the old lubuntu images from back in june, I can get it to boot up. But when I try the u-boot approach rhombus-tech.net, I cant tell if something is happening or not.
<mnemoc>
not sure if it's your case or not, bu 1GB devices are not yet functional from open sources
<coolhp>
Ah !
<coolhp>
That's the ticket !
<coolhp>
Is there any workaround ?
<mnemoc>
i think I saw once some patches to let u-boot initialize the whole thing
<mnemoc>
the best way is to send a 1GB device to hno as gift :)
<coolhp>
:-)
<coolhp>
Now, the old boot-loader (the one in those images from june) works right ?
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<mnemoc>
the nand bootloader chain + linux built with the ignore atag_mem flag enabled should work
<mnemoc>
or the nand bootloader chain + two mem= arguments to the kernel
<mnemoc>
mem=448M@0x40000000 mem=512M@x60000000 should work IF the memory is alreaday initialized
<coolhp>
Ah. So am I understanding that the u-boot method "should" work as long as I set my boot.scr right ?
<rm>
mnemoc, not true
<rm>
they are functional with 512MB of RAM
<rm>
coolhp, I believe the current u-boot is somewhat broken
<rm>
also someone else mentioned old images working, but current nightlies not
<mnemoc>
rm: :)
<rm>
I suggest that you combine the SPL+uboot+boot partition from the old images,
<rm>
with your own root partition
<coolhp>
That's what I was trying to do in the beginning. In fact, the old Lubuntu image would work fine for my purposes if only I could find a way to recompile the kernel with a couple of additional modules....
<coolhp>
But for some reason, I cant build a uImage that works.
<coolhp>
Mine is always 2Mb smaller than the one off of the image for some reason.
<rm>
which modules
<coolhp>
I'd need v4l support, g_serial and snd_usb_audio :-)
<rm>
I see
<rm>
I don't remember if my kernels enable these, probably not
<specing>
I don't think g_serial works
<rm>
I was rebuilding to enable USB LAN and ip6tables
<specing>
it didn't last time I tried
<rm>
and some misc. stuff
<specing>
there is a /dev/ttyGS0 but ... nothing in lsusb
<coolhp>
g_serial is sort of optional for what I have in mind :-D... Basic electronics question : If I wire the UART port on the side of the MK802 to a serial port (GND to GND and MK802-TX to Serial-RX), would that allow me to see some of the boot process logs ?
<specing>
coolhp: you need a 3.3V converter
<coolhp>
Damn....
<coolhp>
Not much I can do withouth that I guess ?
<specing>
no
<specing>
Unless you get a usb-serial dongle without a line driver
<coolhp>
I've got a run of the mill PL-2303....
<specing>
if you are unsure get a voltmeter
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<specing>
if its tx line is at 3v3 when it is not transmitting, it is safe
<coolhp>
Checking :-)
<RaYmAn>
if you're only connecting GND and TX from mk802 to pl2303 GND and RX, then you can't really break anything by just trying it out :)
<specing>
what if you get it wrong? :P
<specing>
(happens)
<specing>
its better to spend 5 minutes making sure it is what you want it to be than frying the only debug option
<RaYmAn>
as long as you connect TX(mk802) only, at most you could fry the pl2303 - but mk802 outputs 3.3v, so even if the pl2303 is setup for 5v, it'd just not get any data
<RaYmAn>
If you connect RX (mk802), and the pl2303 outputs 5v or more, it could potentially fry the output
<mnemoc>
my pl2303 works at 3.3V...
<RaYmAn>
but as long as you are only connecting to RX on pl2303, it only "listens" for voltage, so pretty hard to break
<RaYmAn>
mnemoc: it varies - I have one where you have to switch a jumper between 3.3v and 5v depending on usage
<RaYmAn>
mind you, it'd probably still detect 3.3v signals just fine
<coolhp>
115200, N 8 1 ?
<RaYmAn>
go for it :> if those settings are wrong, you either get nothing or garbage
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<mnemoc>
coolhp: yes
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<coolhp>
Hmmmm.... I must be halucinating. Checking the voltage between my serial gnd and serial rx and I'm getting -9.49v ???
<thefrog>
xenoxaos: OK. didn't want to break it. I'll get my putty knife this evening.
<xenoxaos>
i use my fingernails
<mnemoc>
claws?
<thefrog>
xenoxaos: should i bother to play with the andriod anymore? Switched it to english. Was not able to get much out of it... didn't like my network content on network shares.
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<xenoxaos>
mine skipped and was jumpy as well
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<thefrog>
I never did see this 'groundbreaking' arm annoucement that the rumors were going around on.
<traeak>
heh
<traeak>
never believe "hype"
<specing>
Was that the phorocrap?
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<coolhp>
Ok.. my attempts to build an RS232 to TTL convert out of scrap has failed .... time to move on :-)
<coolhp>
Anyone know if u-boot can log the boot process into a file on the SD in some way ?
<RaYmAn>
I thought you said you had a pl2303?
<coolhp>
I do. Its encased in plastic... its a run-of-the-mill USB to Serial converter.
<coolhp>
I think it only does RS232 :-(
<coolhp>
I do see something when taking the TX from the MK802 and plugging it into the RX on the USB-to-Serial converter... but I guess the voltage must be too low because I only see garbage.
<coolhp>
The rate at which it displays garbage is indicative of a boot process though.
<traeak>
sawa that mentioned before, you need vcc hooked up for the mk802
<traeak>
which is a nono for the mele
<Turl>
coolhp: you need to connect ground too
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<Turl>
and your garbage will then be something readable
<traeak>
uh yeah that regardless
<Turl>
make sure the speed is correctly set too
<coolhp>
I did connect ground.... But my setup is less than ideal. I took GND from the shield on one of the USB ports of the MK802
<coolhp>
Should I try closer to the UART ?
<coolhp>
And the rate is 115200 right ?
<coolhp>
N,8,1 ?
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<traeak>
using a linux box for the serial?
<coolhp>
Windows :-(
<RaYmAn>
coolhp: so your usb-to-serial has a regular 9-pin serial port connector?
<coolhp>
It does, yes
<RaYmAn>
okay, then yeah -it's probably expecting a diff voltage
<coolhp>
Yup... seen those around. I'm just an impatient little bastard and dont want to wait for one to get here *grin*
<RaYmAn>
may as well order a couple while you're at it :P They are surprisingly useful to have around :)
<mnemoc>
coolhp: buy it from your country
<coolhp>
The funny thing is : I've got a couple of BC547 transistors around... if only I could find a proper +5V source on my USB side, I would simply pull the signal up
<Turl>
mnemoc: they charge like 25USD for the 2303 ones over here lol
<mnemoc>
:D
<RaYmAn>
and you can get them from like 2$ from china, lol..Including shipping
<RaYmAn>
that just seems insane :P
<mnemoc>
yeah
* RaYmAn
finally decided to order JTAG thingymabob
* mnemoc
has a flyswatter
<Turl>
yeah, I'm thinking of ordering maybe 10 and reselling for cheaper :P
<RaYmAn>
lol
<RaYmAn>
mnemoc: cool! what are you using it for? I went for a Bus Blaster v2 cause it's cheapo and same hardware as flyswatter
<mnemoc>
RaYmAn: collecting dust :p
<RaYmAn>
lol
<RaYmAn>
I'm sure that's what my bus blaster will end up doing as well
<RaYmAn>
:P
<mnemoc>
as i can't solder...
<RaYmAn>
^^
<RaYmAn>
Just need devices where JTAG is on a header :D
<mnemoc>
exactly :p
<RaYmAn>
did you ever try it on any a10 devices? :)
<RaYmAn>
(you had one of those microsd breakouts, right?)
<mnemoc>
waiting for one with the pins exposed :)
<RaYmAn>
ah
<mnemoc>
yes, indeed
<RaYmAn>
I just got mine today
<RaYmAn>
with pins exposed and it mentions JTAG
<mnemoc>
nice
<coolhp>
Any of you have a 1G MK802 ?
<WarheadsSE>
coolhp: wait, are you using a PC serial to attep to get to the MK802?
<mnemoc>
coolhp: rm
* RaYmAn
has too, but haven't tried serial
<coolhp>
WarheadsSE : Yes
<WarheadsSE>
.. 3.3v, yes?
<coolhp>
WarheadsSE : On the PC end, nope :-( ... Its just RS232
<coolhp>
RM : Do you have it running some linux distro ?
<WarheadsSE>
These devices are ALL 3.3v rs232/ttl
<coolhp>
Which ones ?
<RaYmAn>
WarheadsSE: he only connected TX from device + it was connected to an DB9 port on a pl2303 based usb adapter - so probably no harm (just bringing you up to speed ;))
<coolhp>
Rayman : I've actually got those images running !... that's the worst part... those images use the old bootloader... with the evb.bin file. It actually works like a charm.
<coolhp>
The issue is : I need to build a custom kernel for some extra modules.
<RaYmAn>
you need to disable at least cpufreq and some power management stuff to get it booting afaik
* RaYmAn
pokes IEF
<coolhp>
And when I try to build a new kernel, My uImage always comes out smaller.
<mnemoc>
meh, the 1GB model is out of stock :<
<coolhp>
mnemoc : Where are you ordering from ?
<RaYmAn>
mnemoc: you really need more a10 deviceS? :P
<rz2k>
so now we have three a10/13 devboards.
<mnemoc>
RaYmAn: nah, just want one with 1GB _and_ uart pins
<RaYmAn>
ah
<WarheadsSE>
coolhp: are you compressing the image before placing it in uImage?
<mnemoc>
rz2k: competition is good :)
<WarheadsSE>
I'll have to see if olinuxo will send ALARM some of the A13's
<rz2k>
mnemoc: still only eoma68 will give you all free IOs
<mnemoc>
rz2k: ?
<mnemoc>
rz2k: afaik the olinuxino and the cubieboard will expose all free pins too
<rz2k>
I didnt know that
<coolhp>
Warheads : could be, could be... I'm doing make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j3 uImage
<rz2k>
thought olinuxino is just SBC and no news about cubieboard
<mnemoc>
rz2k: AND an eoma68 card with expansion header stops been an eoma68 card
<mnemoc>
rz2k: and the cubieboard has 2x48 pin headers
<coolhp>
Oh... sorry menmoc.. I Thought you were looking for some... your comment about out of stock.
<rz2k>
I didnt get any cubieboard news so far..
<mnemoc>
coolhp: I want a development board
<mnemoc>
rz2k: I saw some pictures of the prototype.... looks NICE
<rz2k>
I saw only one picture of board layers without GND fill
<coolhp>
mnemoc : gotcha.. sorry. The hackberry would be pretty cool in that case. I use the MK802s as development boards but that's just because I dont necessarily need GPIO... the only interractions I'm going to have with external HW is via USB
<RaYmAn>
It's cool so many fairly cheap dev boards are coming out
<mnemoc>
yeah
<RaYmAn>
with the ouya console coming it at 99$, it should theoretically be possible to get a cheap tegra3 dev board as well (and with the mali400 quad board as well!)
<coolhp>
I really want to see some dev boards with Intel Medfield on it.
<coolhp>
I'd be really curious to see how it pairs up against the ARM solutions out there
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<rz2k>
olinuxino is so close to being a two layer board
* rz2k
checking out layout in Eagle
<mnemoc>
looks nice anyway :p
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<RaYmAn>
It feels like a funky choice that the pins that are by default configured as JTAG are the same as sd controller0
<RaYmAn>
but I guess it does make it easy to do it on production devices
<WarheadsSE>
buf2
<RaYmAn>
buf2?
<rz2k>
RaYmAn: tried to jtag a10?
<WarheadsSE>
I missed tab
<RaYmAn>
rz2k: no - not yet. I order a bus blaster v2 today =P
<rz2k>
I have couple of j-links at work
<rz2k>
I've already tried to find something at ly-f1 testpoints
<rz2k>
failed :/
<RaYmAn>
ly-f1?
<rz2k>
a10 crappy tablet
<RaYmAn>
ah
<rz2k>
7"
<MrChrisDruif>
A10 tablet?
<MrChrisDruif>
I've been looking at one myself
<RaYmAn>
well, from what I understand, it's usually shared with microsd port (e.g. before bootloader touches config, the microsd pins are configured for jtag)
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<WarheadsSE>
I see mksunxiboot leaves the uboot in a state where it is written to block 8, where spl would normally be written, and then uboot to block 32
<WarheadsSE>
Am I missing something along the line in documentation?