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EOMA68 laptop partially assembled
by Luke Kenneth Casson Leighton 20 Jan '16

20 Jan '16

http://rhombus-tech.net/community_ideas/laptop_15in/news/EOMA68_Libre_15.6i… lots to get fixed for another iteration... --- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

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floor covered in bits of plastic and circuit boards...
by Luke Kenneth Casson Leighton 19 Jan '16

19 Jan '16

http://rhombus-tech.net/community_ideas/laptop_15in/news/EOMA68_Libre_15.6i… :) --- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

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libre laptop 3d print run 90% done
by Luke Kenneth Casson Leighton 18 Jan '16

18 Jan '16

holy cow there are *twenty five* separate parts in the laptop's casework. that's just nuts. if someone had said to me, "yeah you're gonna be making a 3d printed laptop, you'll need to do it in 25 separate parts" i would have said, "naah, you're having a laugh - surely it doesn't have to be that complex" which in the past has been my cue to run like hell from any project whenever someone uses the phrase "surely it doesn't neeeeeed to be as complex as alll thaaaat"... :) anyway i'm nearly done - i just have the touchpanel holder to redo, and the battery, pcb1 and keyboard tray supports that run off of it. the parts are all trimmed / adjusted (some details in the join points are just too small to be able to 3d-print accurately with filament), so i should be able to begin assembly in a day or so. fuuun. l. --- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

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laptop casework, jz4775 cpu card, fosdem 2016
by Luke Kenneth Casson Leighton 15 Jan '16

15 Jan '16

hi folks, right. i've moved on to re-printing the 3d casework of the laptop, most of that will be in higher-temperature ABS. i'm about 50% the way through that, so another 2-3 days and i'll have an assembled prototype. some bamboo 1.5mm plywood panels are arriving from a U.S. supplier (the only one in the world that sells online 1.5mm bamboo!) are arriving shortly. the jz4775 cpu card, it turns out that digikey sent the wrong PMIC. bizarre story: the ACT8600-QJ162-T became popular in the past few months because of a smartwatch that was developed in china using the ingenic jz4775 reference design. so the formerly popular ACT8600-QJ601-T suddenly became UNpopular, leaving the world's last remaining supplier as being digikey. so, that's a china-made PMIC, which got shipped to the U.S. (customs-charge), got shipped back to china (customs-charges), then provided by the agent to the factory, then the factory put it on the PCB, then they sent that to me (customs charges)... and then it turns out to be the wrong f*****g IC. naturally it took a whole lot of shouting at digikey to get them to do a full audit of the stock of ACT8600-QJ601-T PMICs, but i've placed an order for replacements - to be sent directly to me - and will be putting those on when they arrive. also, only 1 out of the 6 PCBs happened to _not_ have solder-bridges under the DDR3 RAM ICs, so i've ordered some replacement DDR3 RAM and will be having a go at putting on 78-pin BGAs with the IRDA solder station. it'll be fun to try. ok.... correction: it'll be fun to succeed. also even though it's short notice i'm looking to go to fosdem 2016 because i happen to be in den haag at the moment, it's only a train ride to brussels after all. i'll be bringing along the completed laptop prototype if anybody would like to see it. l. --- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

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EOMA68-jz4775 first usb-loader hello-world success
by Luke Kenneth Casson Leighton 06 Jan '16

06 Jan '16

http://rhombus-tech.net/ingenic/jz4775/news/ yippeee! the jz4775 cpu card didn't blow up, instead it announced itself on the usb bus, and i was able to modify a CI120 usbloader i found, to upload a UART0-based "hello world" program. next phase would be to initialise the DDR3 RAM, then compile and upload u-boot into DDR3 RAM and execute it. all very exciting

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EOMA68-jz4775
by Luke Kenneth Casson Leighton 05 Jan '16

05 Jan '16

Jan 5 14:46:28 bigmac kernel: [1081446.769734] usb 1-2: new high-speed USB device number 86 using xhci_hcd Jan 5 14:46:28 bigmac kernel: [1081446.898689] usb 1-2: New USB device found, idVendor=a108, idProduct=4775 Jan 5 14:46:28 bigmac kernel: [1081446.898693] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Jan 5 14:46:28 bigmac kernel: [1081446.898694] usb 1-2: Product: JZ4775 USB Boot Device Jan 5 14:46:28 bigmac kernel: [1081446.898696] usb 1-2: Manufacturer: Ingenic # lsusb Bus 001 Device 086: ID a108:4775 yippeee, it didn't blow up :) PMIC voltages are good. 1.2, 1.5, 1.8, 2.5, 3.3. whew....

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EOMA68 A20 Libre 15.6in Laptop prototype PCBs, first fully-functioning boot
by Luke Kenneth Casson Leighton 04 Jan '16

04 Jan '16

http://rhombus-tech.net/community_ideas/laptop_15in/news/EOMA68_Libre_15.6i… hardware all fully-functional, despite drawing too much power during the audio test. power is currently hard-wired to a temporary location that will be sorted out when PCB3 is replaced with a board that uses the TI bq24196 - a much better PMIC that is properly compliant with the USB-OTG Power Specification. this is really exciting as it will not be long before a fully-assembled prototype is up and running. l.

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libre 15.6in laptop 2 extra videos
by Luke Kenneth Casson Leighton 03 Jan '16

03 Jan '16

pre-assembly explanation and walk-through videos now available: http://rhombus-tech.net/community_ideas/laptop_15in/news/ this is all prior to first power-up. i'm honestly slightly nervous about powering the boards up when they're wired together like this, because the slightest short-circuit or incorrect cable and it'll damage things. although i do have some revision 1.0 EOMA68-A20 CPU Cards left, i'd rather no more were damaged! still, i've tested them all individually - it should be fine. l.

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libre laptop PCB2 video, STM32F072 dual USB endpoint demo and explanation
by Luke Kenneth Casson Leighton 02 Jan '16

02 Jan '16

http://rhombus-tech.net/community_ideas/laptop_15in/news/ did a quick video showing the disassembled chicony keyboard matrix working and generating USB-HID events at the same time as CDC-ACM (usb serial) responding. l.

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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.

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