arm-netbook December 2015

arm-netbook@lists.phcomp.co.uk

10 participants
12 discussions

keyboard matrix (and usb-hid stm32f072 firmware) functional
by Luke Kenneth Casson Leighton 27 Dec '15

27 Dec '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/PCB2_prototype_fun… i'll make a short video once the camera's battery is charged up - i have yet to do the keyboard modifiers (shift, ctrl) however everything else is properly functional. with 1st revision prototype firmware available as GPLv2+ source, which has at least proven that the hardware is operational, i can move on to the audio circuits tomorrow, and after that can begin assembly. l.

2 4

first revision eoma68 jz4775 cpu cards assembled
by Luke Kenneth Casson Leighton 26 Dec '15

26 Dec '15

http://rhombus-tech.net/ingenic/jz4775/news/26dec2015_pcb_rev1_populated/ still to be tested but they've actually been assembled. l.

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chicony keyboard matrix reverse-engineering
by Luke Kenneth Casson Leighton 24 Dec '15

24 Dec '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/Chicony_keyboard_m… the article about keyboard matrix design, linked from the above, is quite interesting. keyboard design turns out to be fascinatingly complex for something that we take for granted every day. l.

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LWN: Hands on with the pi-top
by Paul Boddie 17 Dec '15

17 Dec '15

Hello, I thought that some of you might be interested in this, at least in the context of laptop projects, what other people are doing, and the finished products: http://lwn.net/Articles/667040/ I guess the Raspberry Pi aspect of it means that people are willing to throw their money at something that doesn't really seem to be a particularly good product: tied to the RPi, no speakers or audio outputs (apart from on the RPi board itself), the usual proprietary software dependencies and promotional activity, reportedly dodgy keyboard... Also of interest is that their desktop version recently got funded very quickly indeed. Again, the same RPi dependencies and constraints apply. I guess it shows that there's a market for such stuff, even if (or especially if) you take the RPi cargo culture out of the equation. Paul

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early alpha production run of libre laptop PCBs, microdesktops and CPU Cards
by Luke Kenneth Casson Leighton 16 Dec '15

16 Dec '15

it's a little early but i wanted to get a poll out of people who might be interested to buy the PCBs (and other parts) as a kit, for both the libre laptop PCBs and the microdesktop units. when i say "early" i mean "there's pretty much no software" - i have preliminary working firmware that i'm using to confirm that various hardware functions work (keyboard, touchscreen, battery monitoring), however as for actual "useable drivers", those do not exist and will need to be written. this is therefore a solicitation for assistance in writing the drivers as much as it is an offer for people to be involved and have extremely-early hardware. the casework for the laptop is available as GPL pyopenscad files: i could potentially print some up for people but would prefer it if you used an online 3d printing service or local hackerspace. the micro-desktop, in direct contrast to the laptop, requires absolutely no drivers whatsoever and works straight away. estimated low-volume (5-10) pricing is going to be somewhere around: * eoma68-jz4775 CPU Card: $300 (cost of 5 PCBs is $1500) * eoma68-a20 CPU Card: same. * laptop main PCB1: $150 * laptop E/C PCB2: $120 * laptop PMIC PCB3: $120 * microdesktop PCB: $150 * laptop battery: $12 * 15.6in LCD: $50 (obtainable on ebay) * Chicony Keyboard: $20 (again, obtainable on ebay) * USB-UART: $5 (obtainable on ebay or adafruit or digikey or anywhere) there are various other sundries that are needed - cables, connectors etc. i can put together kits for people. if we can get as high as 25 units on particular boards, that pricing is likely to drop by something like 25%, at least. if anyone is considering this, please *do* consider prioritising getting the micro-desktop as well, i find it is very useful to have a working setup with the micro-desktop, separate from the laptop PCB, in a totally separate area of my desk. please also bear in mind, i am going through to a 2nd revision of all of the above PCBs, so we will be looking at about 2 months before these boards can go to a (larger) run - i wanted to give people an opportunity to say if they'd like to be involved. l.

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15in libre laptop, 1366x768 LCD operational
by Luke Kenneth Casson Leighton 14 Dec '15

14 Dec '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/ yippeee! i cleaned up the tracks around the SN75LVDS83b, and also i disabled HDMI (2nd) output entirely in the script.fex. the LCD is now fully operational, and is running at a low-power-saving screen refresh rate of only 37hz. that drops the power consumption of the LCD panel by a huge 40%, as well as allowing the SN75LVDS83b to operate at a lower speed and use less power as well. yaaaa :)

1 0

A64 SDK
by Luke Kenneth Casson Leighton 11 Dec '15

11 Dec '15

small favour to ask of people (anyone): search "lichee_A64_A5.1_V1.0.tar.gz", this should come up with a link on baidu. endeavour to download this file, then check whether it's corrupted or not. thanks in advance, l.

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HX8357D SPI LCD and STM32F072 nucleo dev-board success
by Luke Kenneth Casson Leighton 10 Dec '15

10 Dec '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/ managed to *reliably* initialise the adafruit hx8357d LCD from the STM32F072 using 9-bit SPI bit-banging. the yunlea LCD will need to be tested next, with PCB2. l.

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Paypal sabotage crowdfunding
by Philip Hands 06 Dec '15

06 Dec '15

Hi Folks, Since this list has people that are reasonably likely to come up with crowdfunding projects, I thought I'd point at this sorry state of affairs, caused by Paypal: http://neo900.org/news/paypal-trouble-delays-project (the link to http://garethhayes.net/paypal-warning/ is hardly encouraging either) Cheers, Phil. -- |)| Philip Hands [+44 (0)20 8530 9560] HANDS.COM Ltd. |-| http://www.hands.com/ http://ftp.uk.debian.org/ |(| Hugo-Klemm-Strasse 34, 21075 Hamburg, GERMANY

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Free Soft & Hardware: ControLeo2 Reflow Oven
by Alexander Stephen Thomas Ross 04 Dec '15

04 Dec '15

came across this thought it might be on interest maybe. http://www.whizoo.com/

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arm-netbook December 2015