Turl changed the topic of #linux-sunxi to: Allwinner/sunxi /development discussion - did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait! - https://github.com/linux-sunxi/ - Logs at http://irclog.whitequark.org/linux-sunxi
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<MoeIcenowy> How to gracefully add a non-mainlined driver's device tree node for a Q8 tablet?
<MoeIcenowy> Device is http://linux-sunxi.org/Aoson_M751s
<MoeIcenowy> I want to enable sdc1 for SDIO (esp8089), and add a ctp@40 node (gsl1680) on i2c0
<MoeIcenowy> for gslx68x, I used driver at https://github.com/jwrdegoede/gslX68X
<MoeIcenowy> and a modified dt at http://pastebin.com/RL4vrrqe
<MoeIcenowy> however, gsl1680 seems to be not working at all...
<MoeIcenowy> If I directly insmod silead.ko, it won't enable PH1 (ctp_wakeup in fex) and the driver will argue about connection issues to the chip (seems that the chip is not enabled)
<MoeIcenowy> If I manually enable gpio225 and set it to 1, then insmod, the driver will succeed to load the firmware, but IRQ seems not to be working. (I added some debug code inside the IRQ handler)
<MoeIcenowy> If I manually enable gpio for the IRQ pin, and check its value, I find that the value of the pin is ok.
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<KotCzarny> lvrp16: still no opi+2e in sight :/
<lvrp16> Lol patience. Steven said this week. Most likely the end of this week.
<KotCzarny> :)
<lvrp16> my operations are killing me...
<lvrp16> 3am everyday this week, get up at 8:30
<lvrp16> remember to never let your kid start a business
<KotCzarny> or let him fail gracefully at least once?
<lvrp16> failing at business is no fun
<lvrp16> fail in school
<lvrp16> don't fail in business
<wens> fg
<KotCzarny> irc: fg, command not understood
<MoeIcenowy> gsl1680 is a disaster...
<MoeIcenowy> the kernel driver didn't work as I expected...
<MoeIcenowy> the userspace driver is of low quality...
<MoeIcenowy> and the firmware (including configuration) is like a mess...
<wens> lvrp16: 3am? conference call with Chinese vendors?
<lvrp16> everyday...so tiring
<lvrp16> i will have someone in shenzhen run ops by july to reduce my own workload
<plaes> MoeIcenowy: which gsl driver are you using?
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<plaes> MoeIcenowy: this: https://github.com/jwrdegoede/gslX68X ?
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<oneinsect> lvrp16: this is a good time to be in business all the more!
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<lvrp16> oneinsect: haha good time to be in the accessory business
<lvrp16> the sbc business is a loss leader
<lvrp16> for every raspberry pi sold, we lose $2
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<KotCzarny> lvrp16: dont sell raspies then ;)
<lvrp16> KotCzarny: then you would be a niche player and niche players do not survive long in this market
<KotCzarny> hmm
<KotCzarny> so you sell raspies just to be found?
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<lvrp16> ;)
<lvrp16> you make it sound so pitiful, but I cannot deny the truth ;)
<lvrp16> i prefer: you cannot see far without standing on the shoulder of giants
<KotCzarny> i prefer, marketing is 90% of the bussiness
<KotCzarny> marketing == being seen
<lvrp16> amen
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<MoeIcenowy> how to enable a sdio slot on a allwinnner device with mainline kernel?
<MoeIcenowy> (it's a q8 tablet)
<MoeIcenowy> how can I write the dt overlay?
<plaes> IIRC, linux-sunxi doesn't support overlays
<MoeIcenowy> mainline
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<MoeIcenowy> not linux-sunxi
<MoeIcenowy> this tablet is a33
<plaes> well, arm-sunxi
<MoeIcenowy> thus the device tree can only be fixed?
<plaes> C.H.I.P. tree supports overlays, but I have not investigated how they do it
<plaes> and Cubietruck has sdio wifi
<MoeIcenowy> C.H.I.P kernel source tree?
<MoeIcenowy> thx
<MoeIcenowy> I will have a look at it
<plaes> you can also check cubietruck dts
<MoeIcenowy> maybe I should create a dedicate dts for my tablet...
<wens> afaik the overlay stuff is not supported in mainline (kernel, u-boot and dt compiler)
<wens> i think there was a plan to enable all possible wifi combinations for q8 tablets
<MoeIcenowy> wens: to enable all the usbcs and sdcs?
<wens> MoeIcenowy: yes, something like that
<MoeIcenowy> wens: should a device node for the sdio card exist in &mmcx?
<MoeIcenowy> (as some devices have cards which have only out-of-tree driver... for example, my tablet's esp8089
<wens> MoeIcenowy: sdio devices are discoverable, and probed by the mmc core, not from DT
<MoeIcenowy> why does sun7i-a20-cubietruck.dts have a node brcmf: bcrmf@1 under &mmc3 ?
<wens> because the brcmfmac binding defines the usage of oob interrupt line
<wens> but the driver actually just scans the DT (after being probed from sdio) for the node to look up the interrupt line
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<KotCzarny> wasnt yesterday someone hacking at mmc sdio?
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<MoeIcenowy> arch/arm/boot/dts/sun4i-a10.dtsi:46:41: fatal error: dt-bindings/thermal/thermal.h: No such file or directory
<MoeIcenowy> What the hell
<MoeIcenowy> (linux-4.6-rc7
<NiteHawk> worked for me with sun7i-a20.dtsi (which has the same #include)
<MoeIcenowy> I think the build system may be messed...
<MoeIcenowy> try to disable -j
<NiteHawk> probably - that include isn't new in sun4i-a10 (been there since 2015-01)
<MoeIcenowy> ok I will now sleep for a while... I'm building a "general" big kernel
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<MoeIcenowy> arch/arm/boot/dts/include/dt-bindings became a file with permission 000 and size 0...
<MoeIcenowy> so strange
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<MoeIcenowy> oh it's still broken
<Amit_T> Does PSCI v0.2 implemetation exist for H3 u-boot ?
<NiteHawk> ssvb: i just noticed your comment in http://linux-sunxi.org/FEL/USBBoot#cite_note-goodspeed-4 - i take it that we might want to flag "good" BROM implementations, and ignore our workaround (thunk code) for those?
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<wens> Amit_T: 0.2?
<ssvb> NiteHawk: we don't need ".mmu_tt_addr" for these because it does not provide any practical improvements
<ssvb> NiteHawk: the speed of the FEL data transfer is likely limited by the USB hardware
<NiteHawk> i meant: your "hexdump" sid experiment shows we can ignore the readl/writel code and simply map those to the 'standard' read/write, i.e. 32bit access isn't problematic with such BROMs
<apritzel> Amit_T: make it 1.0, if you are at it anyway
<ssvb> NiteHawk: I was just trying to find an explanation why setting up the MMU does not help and then tried this hexdump test, which confirmed that something has probably changed in the BROM
<ssvb> NiteHawk: but we can't be completely sure until somebody does a detailed review of the BROM code
<NiteHawk> ssvb: i see. it's something we might keep in mind then
<ssvb> NiteHawk: the readl/writel code is at least safe to use
<ssvb> NiteHawk: as for the current ~510KB/s FEL transfer speed limit on A64, it's probably something similar to http://git.denx.de/?p=u-boot.git;a=commit;h=52d093112a307b2dd1ae46f8bd6ba7904760ac57
<Amit_T> wens:apritzel: isn't PSCI v0.1 implementation exist for H3 , next version should be v0.2 ?
<NiteHawk> ssvb: yes. that's a figure that's reasonably in line with other SoCs, e.g. A31s and A83T
<wens> Amit_T: newest version is 1.0
<Amit_T> wens: ok
<wens> ssvb: setting AHB to 200 MHz from PLL6 is desired for all SoCs
<wens> it will not be affected by cpufreq
<ssvb> wens: USB seems to be hooked to AHB2 in A64, and the manual says that the default is supposed to be 300MHz
<wens> oh
<wens> if it can run that fast, even better :)
<ssvb> I need to dump the hardware registers when running the Allwinner's kernel and check what are the defaults there
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<MoeIcenowy> wens: I tried to enable the dt overlay test
<MoeIcenowy> and it seems to be succeeded
<MoeIcenowy> the unit test said to be all passed
<MoeIcenowy> for q8 devices I think overlays will be finally required
<MoeIcenowy> at least for i2c-based accelerometers
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<Amit_T> apritzel: ok.
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<apritzel> Amit_T: and please, don't make it H3 specific, the U-Boot PSCI implementation is generic
<MoeIcenowy> how to keep the sd card as /dev/mmcblk0 after sdio is enabled?
<apritzel> Amit_T: also google for previous patches, I remember at least two attempts in the past to update U-Boot's PSCI
<Amit_T> apritzel: its not merged in mainline , right ?
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<apritzel> Amit_T: Why do you ask me, I thought that this was the reason for your question?
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<apritzel> Amit_T: also please check back with wens, who was working on PSCI in U-Boot lately
<Amit_T> apritzel: ok
<Amit_T> sorry for confusion
<NiteHawk> Amit_T: https://patchwork.ozlabs.org/project/uboot/list/?submitter=67845&archive=both&state=* - there seem to be some patches in the pipeline, current status is "changes requested". you should probably read up the conversations on the mailing list
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<Amit_T> going through it
<Amit_T> apritzel: But actual PSCI function implementation needs to be done H3 specific psci_sun6i.S file , right ?
<apritzel> well, yes, at least for reset (and shutdown) you need board specific hooks
<apritzel> but please implement it in a way that other boards can simply reuse it (weak functions or callbacks or the like)
<Amit_T> ok
<apritzel> to be really standards compliant, we would need to only advertise PSCI >=0.2 if we implement reset and shutdown
<apritzel> we should have reset for many boards anyway, but shutdown is more tricky
<apritzel> so I suggest: extend the generic PSCI framework to cover the new PSCI 1.0 functions
<apritzel> provide a config symbol for a board to signal that it has reset and shutdown hooks
<apritzel> *for each board*
<apritzel> advertise PSCI 0.1 if the board doesn't and PSCI 1.0 if it does
<wens> that should be easy to do with weak symbols
<apritzel> wens: yes
<wens> if (!symbol) patch_dt_with_psci_0_1
<wens> my PSCI conversion should be done soon
<wens> trying to get rid of assembly stub/jump functions
<Amit_T> wens: you already working on this ?
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<MoeIcenowy> wens: I referenced the dt code of cubietruck, enabled mmc1 in the dt
<Amit_T> NiteHawk:wens: I meant to say, on implementing v1.0.
<MoeIcenowy> however I get "sunxi-mmc 1c10000.mmc: smc 0 error, cmd x, RTO !!"
<MoeIcenowy> and no sdio device in /sys/bus/sdio/devices
<MoeIcenowy> and mmc0(sd slot) became /dev/mmcblk1
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<wens> Amit_T: i'm converting most of the sunxi PSCI code to C (from assembly)
<Amit_T> wens: ok
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<Amit_T> apritzel: Got your point, https://patchwork.ozlabs.org/patch/569428/ , This patch extends/implement PSCI services only for freescale specific boards but what we want it more general implementation that goes into arch/arm/cpu/armv7/psci.S file to start with
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<apritzel> yes, seems to be common U-Boot problem: just make it work on my board
<Amit_T> apritzel: Sorry for asking too basic of a question, PSCI v1.0 defines new functions which were not there in older PSCI specification, right ?
<apritzel> that's usually the idea of a new revision of a spec, yes
<Amit_T> ok
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<nabblet> did you already see "rootmydevice" in sunxi's 3.4 kernel? https://twitter.com/DaveManouchehri/status/729453383799738369
<KotCzarny> nabblet, if you didnt know, it was found here
<KotCzarny> fun of social media not posting sources, heh
<nabblet> KotCzarny: didn't know
<nabblet> acutally got this link second-hand myself
<nabblet> in that case it's old news. Sorry for the noise :S
<KotCzarny> :)
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<pitillo> hey, are there info about how to build the uSD card for the pine? I mean all uboot stuff. I've got longsleep minimal image and put the roofs directly in the second partition, but I'd like to add some documentation about how to build the uSD card from scratch (like is done in cb and cb2)
<KotCzarny> only thing you need is uboot, kernel and rootfs
<KotCzarny> if you are familiar with linux you know how to debootstrap rootfs etc
<apritzel> pitillo: doesn't longsleep have a build script for this?
<apritzel> though this is work in progress, I am halfway done with some more elaborate documentation
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<pitillo> apritzel: I'll check it (I haven't deeped in the scripts, I was looking for some info like there were for cb1/cb2). Btw, it could be a good start point to see what it does and try to do it by hand. Thank you very much
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<apritzel> pitillo: If you just want to bring it up, look at the commit message before that one above: it references a firmware image and what to do to boot your own kernel
<pitillo> ummmm I'm reading the info and I see that it's using android partition schema (not only vfat + rootfs partitions)
<pitillo> I need to read it slowly at home with the device near to start playing with it
<apritzel> pitillo: this information in the README is outdated
<apritzel> the commit message is the current reference, I will update the README.md ASAP
<pitillo> ahhhh sorry about the confusion. I'll check the boot0img tool then. Thank you again apritzel
<apritzel> pitillo: don't say sorry because I failed to update the documentation ;-)
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<nove> so many concern about some random way to get root (like rooting android isn't a thing)
<nove> if only there would be this level of caring about the unspeakable "license issues"
<dave0x6d> KotCzarny: I only saw your initial chat log here after hd moore showed me. It's slightly disappointing that there was no coverage until I made a sarcastic comment on it.
<KotCzarny> dave0x6d: there was a coverage when tkaiser contacted all interested parties
<KotCzarny> only friendlyarm responded
<KotCzarny> (and of course armbian)
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<KotCzarny> and seriously, its just dev help from allwinner. they dont take security as an important feature
<dave0x6d> yeah, I meant from the news side.
<KotCzarny> BUT, if there are docs and specs for hw, people can write their own software
<KotCzarny> so i bet there more dangerous bugs in their code than plain debug easy to spot and disable
<KotCzarny> *there are
<KotCzarny> same as above, we dont care about droid much
<KotCzarny> we shall care about open source drivers
<KotCzarny> or at least docs
<dave0x6d> my post wasn't about Android, more about kernel releases I'm general.
<dave0x6d> in general*
<nove> allwinner cares, but only after bad publicity
<dave0x6d> nove: hahah, successfully managed to shame them into it.
<dave0x6d> Nice.
<KotCzarny> sure, and next time they just make it more obscured
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<dave0x6d> nove: wait, am I blind or did they not actually push it?
<KotCzarny> :)
<nove> i don't know, github is not good to show the diff of 1000+ files
<apritzel> yeah, just couldn't find it myself
<dave0x6d> There's literally no changes made this year.
<KotCzarny> just try to find that file in master maybe?
<dave0x6d> Ah, looks like it's gone. Why on earth do they insist upon removing all commit history?
<apritzel> so did they "git push --force" their tree with that part removed from the history?
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<nove> don't worry people
<nove> is still there in the A83T branch
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<apritzel> nove: of course, the complaint was all about the H3! ;-)
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<montjoie> yeah I am near to have AES working on H3 Crypto Engine
<willmore> montjoie, congratulations.
<KotCzarny> woo!
<montjoie> it could be earlier if I was smart enought to enable module clock...
<willmore> montjoie, overclock the crypto engine!
<willmore> That needs to be a meme.
<KotCzarny> overclock the overclockers!
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<montjoie> willmore: last time I try overclock bad things happen, but at least the result is secure
<willmore> LOL
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<lvrp16> is the h3 crypto engine any faster than the a31/a33 crypto?
<willmore> montjoie, overclocking ethernet is not a good idea.
<KotCzarny> :)
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<KotCzarny> overlocking
<willmore> My comment was sort of on that topic. Has the unexciting crypto performance possibly due to us not clocking the crypto unit properly? What if it's been running at some 'idle' low speed mode because we didn't poke the right magic setting into the clock config registers?
<montjoie> willmore: I speak about crypto engine, never tried to overclock ethernet
<willmore> KotCzarny, only if you do it right.
<willmore> montjoie, I was joking about your recent good work with the ethernet driver. ::)
<montjoie> lvrp16: I expect that it will be faster, at least it have 4 channel of work
<willmore> That sounds interesting.
<montjoie> the greatest problem is "why allwinner removed RSA from H3 user manual"
<willmore> RSA if falling out of favor in the crypto world.
<jelle> hah
<KotCzarny> as long it frees cpu its good
<montjoie> KotCzarny: the A83T and H3 is only with DMA (no cPU poll) so no choice it will free CPU
<willmore> montjoie, every feature you advertise is a feature you have to test and guarentee. If people aren't demanding RSA, why go through that pain? (conspiracy theory: they knew it had a bug, so they quietly cut it out)
<montjoie> willmore: like CTS/CTR in A20:)
<KotCzarny> idea, benchmark crypt with cpu loaded
<willmore> montjoie, in that it had a bug and they cut it out? Or in that CTS/CTR aren't recommended for use anymore? (or both)
<montjoie> willmore: bug
<montjoie> and then typex all user manual:)
<lvrp16> did they fix it in a83t?
<lvrp16> or h5?
<willmore> H5?
<lvrp16> allwinner h5
<willmore> That's two more than H3!
<lvrp16> h3 + massive gpu
<montjoie> lvrp16: at least it is written in datasheet
<willmore> lvrp16, oh, how uninteresting. Unless the GPU can do OpenCL?
<lvrp16> nope mali 450
* willmore yawns
<willmore> "massive gpu" Mali 450? Is it opposite day?
<willmore> Actually, the H5 is listed as an 8xA53 which sounds nice.
<lvrp16> 4xa53
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<lvrp16> massive in that the h3 mali is tiny
<lvrp16> so yes, massive
<lvrp16> i don't think allwinner keeps their roadmaps up to date
<lvrp16> the public ones at least
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<lvrp16> yeah i don't think that's valid anymore considering we haven't heard a peep about h2
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<lvrp16> i really don't know what allwinner is doing...
<lvrp16> they're throwing their business at amlogic
<lvrp16> is the rockchip allwinner merger real?
<jelle> oh this is old
<lvrp16> jelle: not real? just re-spun old news?
<jelle> well lvrp16 1 year old now atleast :-)
<jelle> the roadmap
<lvrp16> allwinner needs to wake up and smell what's cooking
<jelle> I wonder where the other H's are?
<willmore> Where the H?
<lvrp16> amlogic is in every thing now...there won't be a market for allwinner in 2 years
<jelle> willmore: H8 , H64
<KotCzarny> drop the prices, problem solved
<jelle> wtf orange pi lite is $12
<lvrp16> amlogic is dropping prices and adding mainline support...
<willmore> There's always room at the bottom
<jelle> that means, that it makes no sense to buy the pc or one hmm
<KotCzarny> jelle, im waiting for the opi+2e
<tkaiser> jelle: Are you kidding? The Lite has no Ethernet ;)
<lvrp16> orange pi one is good for home automation
<lvrp16> tkaiser: amen
<jelle> tkaiser: oh that's the catch
<KotCzarny> :)
<jelle> tkaiser: but it does has IR ?!
<KotCzarny> usb--eth ?
<KotCzarny> or no usb ports neither?
<jelle> oh but wifi
<tkaiser> jelle: And mic again!
<jelle> i find it funny they make a lot of differnet cheap boards
<willmore> On board mic?
<tkaiser> willmore: Yes, on Orange Pi One not available (no idea who uses these components)
<willmore> What a strange thing to put on an SBC.
<jelle> it's there for eaves dropping
<KotCzarny> opening door on knocks?
<KotCzarny> or footsteps
<KotCzarny> or voice command
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<jelle> the wifi is interesting though
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<lvrp16> i am trying to sell orange pi to security companies
<lvrp16> to monitor noise remotely
<jelle> ohhh
<lvrp16> orange pi lite is idea because of the mic, can do ambient noise detection
<jelle> lvrp16: do you have some software for it then?
<lvrp16> and it can be easily installed
<tkaiser> jelle: new WiFi chip no one heard of before
<lvrp16> they have their own software, i just need to plug into their api
<lvrp16> measuring db and sending snmp notification is like 5 minutes of work
<tkaiser> lvrp16: So eaves dropping is really the reason for the mic. Thx for confirmation
<jelle> tkaiser: haha yeah I just saw your comments...
<jelle> on cnx
<jelle> ARM is full of suprises eh ;-)
<lvrp16> tkaiser: haha i have to creatively make ends meet
<KotCzarny> 'opi, open the bay door'
<KotCzarny> 'cant do that dave'
<lvrp16> i'm actually planning to sell an orange pi lite, amazon echo kit
<jelle> opi, echo rootmydeice > /sys/blah/debug
<lvrp16> but thats my secret
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<lvrp16> because i'm losing a boatload on raspberry pis right now
<KotCzarny> make the people want them somehow?
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<lvrp16> yeah, i constantly think of new applications for sbcs and then contact companies about potential use cases
<lvrp16> orange pi is great because it's basically at cost
<lvrp16> raspberry pi's aren't great because premiere farnell is a disfunctional company
<lvrp16> dysfunctional
<lvrp16> i order stuff from them, i receive them damaged, and it takes like 2-3 months to resolve. meanwhile they spend millions rebuilding their website.
<tkaiser> lvrp16: But isn't that the mythical foundation that is spending millions on their website? Or Farnell?
<lvrp16> Farnell
<lvrp16> i'm still waiting on 30k of sales tax refund from them
<lvrp16> Raspberry Pi Foundation is pretty good
<lvrp16> 30k of working capital that is locked for 6 months while they sit on their hands
<tkaiser> lvrp16: Sounds like doing business with BMW ;)
<lvrp16> tkaiser: have you worked with BMW? their car subsystems is very integrated
<lvrp16> but very old...
<lvrp16> are*
<lvrp16> i like it and hate it at the same time...and the fact they can't expose their sensors data more opaquely
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<tkaiser> lvrp16: Only through customers of mine and all the time it was about marketing or publishing processes. So not related to their cars at all.
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<lvrp16> lol, 2nd to last day at my company, the guy that's going to replace me wipes my hard drive accidentally
<lvrp16> XD
<KotCzarny> 'accidentally'
<lvrp16> then he blames me for for "there's no documentation"
<KotCzarny> 'go f*ck yourself'
<KotCzarny> ;)
<lvrp16> he just decided to run scripts on my hard drive without looking at them
<lvrp16> as root
<KotCzarny> lol
<lvrp16> and without consulting me
<lvrp16> hilarity ensues...
<KotCzarny> seriously, you allowed to touch computer by t he noob?
<lvrp16> LOL this is like 2 years of work hahahahahaha
<ssvb> lvrp16: what about backups and the use of version control systems?
<lvrp16> i sent a request to our IT department in march 2015 to back the stuff up
<lvrp16> still waiting...XD
<KotCzarny> looks like you will be doing a lot of 'consulting' ;)
<lvrp16> jesus...what a bonehead
<lvrp16> i have scripts for imaging remote systems
<KotCzarny> first thing, how come he had the root access
<lvrp16> he copies it out of my nginx directory, chmod +x it
<lvrp16> sudo su
<lvrp16> then runs it
<lvrp16> the script does a system wipe
<lvrp16> it's called mksystem.sh
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<willmore> lvrp16, in their defense, they had a horrible web site. I tried to buy some pi's from then a year or so ago and gave up in frustration and ordered them from Amazon. It was horrible. then again, knowing them, they'll probably make the new one worse.
<lvrp16> orange pi?
<lvrp16> oh raspberry pi
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<willmore> Yeah, rpi. I think it was when the 2's came out.
<lvrp16> i have not bought directly from the rpi foundation. I just know premiere farnell is a mess.
<KotCzarny> i want opi+2e.
<lvrp16> KotCzarny, it ain't christmas yet
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<KotCzarny> doesnt matter. want.
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<willmore> Printing a pine64 case. :)
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<willmore> If this works well, I might start printing extras for others.
<KotCzarny> 1. make a post on pine site, 2. print, 3. ????, 4. profĩt!
<lvrp16> willmore what kind of extruder do you have?
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<willmore> lvrp16, It's a Wanhao Duplicator i3 V2 which uses an Mk10 extruder. 0.4mm. I'm printing the case in black ABS.
<willmore> KotCzarny, I'm not going to sell them--there's not enough money in that to make it worth the printer time. But, if I use them as calibration test (like I have been using rpi cases), then I will end up with a lot of spares. Might as well give those to people who need them.
<KotCzarny> there are no emi shielded cases
<KotCzarny> apart from few alu drilled ones
<willmore> Hmm, wonder if any of the metal infused filaments would do any good for EMI.
<lvrp16> you can spray paint aluminum on the case
<KotCzarny> just glue metal net inside
<willmore> Or the Al tape used in HVAC work.
<KotCzarny> spray paint might be too little
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<willmore> Not sure you're going to want to spray paint ABS. It dissolved in most of the solvent bases used for those paints.
<KotCzarny> anyone tried passing those pi boards through UL or similar?
<KotCzarny> or just measure interference?
<willmore> The pi3 had to get a lot of testing because it was an intentional emitter. Not sure about the older ones. Probably basic EMC testing.
<KotCzarny> did it pass?
<lvrp16> why UL?
<lvrp16> It should be FCC or CE
<KotCzarny> dont know what is the proper name
<lvrp16> EMI is FCC for America and CE for Europe
<lvrp16> pi 2 and pi 3 both passed internal testing, FCC and EU have not formally tested pi 3, i think they tested Pi 2
<KotCzarny> because those boards run bare (plastic cases do nothing in that manner)
<lvrp16> since the emitted bands are the open wifi bands, it doesn't really matter
<KotCzarny> um, electronic components produce emi noise too
<lvrp16> i mean that the primary emitted signal are in 2.4ghz band. all other frequency emissions are below fcc/ce thresholds
<lvrp16> i think most chips now a days have spread spectrum tech, so kind of easy to bypass fcc/ce. fcc/ce tests are kind of stupid anyway
<KotCzarny> that comes from measurements or just theoretical?
<lvrp16> measurement, there's a self-certification process
<lvrp16> basically you state as a matter of prosecutable fact that your device complies with fcc/ce guidelines
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<lvrp16> if fcc/ce requests the information, you better have it and can prove it
<KotCzarny> good
<KotCzarny> what about opi and friends?
<lvrp16> opi is self-certified as well, sinovoip and lemaker are as well
<lvrp16> no idea about pine64, nano pi, etc
<KotCzarny> thats reassuring
<lvrp16> i know cubietech isn't certified to fcc
<lvrp16> for their cb4 and cb5
<KotCzarny> but they do ce most likely
<lvrp16> yes, almost all of them do ce
<lvrp16> i think it's all bullcrap anyway, electronics would advance much faster without fcc
<lvrp16> because then companies would actually have to deal with noisy environments as part of design
<lvrp16> and wideband tech would be much better
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<willmore> lvrp16, for intentional emitters, they need to show that the emitted signal meets the Part 15 spec. "unlicensed" doesn't mean "unregulated".
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