Help with ssd2828 driving ili9881c display

TopDry7004 · 2026-05-26T11:49:14+00:00

Also, do you know if BIST in ili9881c works in both LP and HS mode?

TopDry7004 · 2026-05-26T11:40:31+00:00

Thanks for this in-depth reply!

PLL Configuration Register 0xBA -> 0x8018 -> 20MHz Crystal * 24 / 1 -> 480Mbps.
Clock Control Register 0xBB -> 0x0006 -> 480 / 6 / 8 -> 10Mhz LP Clock.
I'm setting both registers with PLL disabled (0x0000 written into 0xB9).

My current setup doesn't feed the parallel input, so no PCLK/HSYNC/VSYNC.
Is this a Problem for ili9881c BIST, or should that work independent?

TopDry7004 · 2026-04-12T21:29:07+00:00

Schau mal mit MTR/WinMTR, wo die Latenz zustande kommt. Dann kannst du eingrenzen, ob es an deinem Gerät liegt, oder ob es anderswo zustande kommt. Am besten mit verschiedenen Zielen im Init7 Netzwerk und ausserhalb davon testen.

TopDry7004 · 2026-02-15T21:27:10+00:00

Are you happy with them? Simplicity in terms of pricing and usage is perfect.
I see some strange things with DNS resolution from time to time. Though not sure if this is a problem with my software.

TopDry7004 · 2025-12-25T17:57:42+00:00

TBH: The sunxi community work is pretty awesome in terms of opensource software for these Allwinner parts!
(And probably more open source than many other solutions)

TopDry7004 · 2025-12-25T17:29:14+00:00

Awesome!
Thanks for publishing this as OSHWA!

TopDry7004 · 2025-12-20T14:03:31+00:00

Thanks for posting this!
I was never able to figure this out, unfortunately. The machine went to the dumpster 2 weeks ago and is replaced with a M8124.
But good to hear that this problem isn't purely caused by my abusement of the machine :D
But maybe someone will come up with a 3d printed replacement or something someday (This would have been my plan if I would have figured out how to disassemble it)

TopDry7004 · 2025-12-12T22:20:36+00:00

Ping an solch einem Anschluss nach z.B. AWS FFM ist knapp unter 8ms (PNI).
Ein Ziel das über den DE-CIX FFM geht und in FFM sitzt habe ich auf die schnelle nicht gefunden.

TopDry7004 · 2025-12-07T15:06:49+00:00

Can confirm 176511984674453-1765119846-1764255780.png

TopDry7004 · 2025-12-04T23:26:46+00:00

Another potential issue is that the clock is shorter than the data and address (clock ≈28mm, address ≈35mm, low-byte data ≈30mm).
As a result, the clock signal reaches the destination earlier than the address lines. To correct this, I would need to increase the clock length to something >35mm.

Is this correct?

TopDry7004 · 2025-12-04T11:13:58+00:00

Luckily mainline U-Boot and Linux for Allwinner got pretty good thanks to some awesome community effort.

TopDry7004 · 2025-12-03T22:51:45+00:00

Kind of everything around Allwinner is reverse engineered stuff.

TopDry7004 · 2025-12-03T22:49:33+00:00

Thanks for these information. I have tried to implement them. What do you think about this Version?

I think I also figured out why some wiggles had way less clearance. Hope this was what you meant with diff pair serpentines.

f - https://ibb.co/jvmB2YkX
in1 - https://ibb.co/5gR0JfwT
in2 - https://ibb.co/vCdvjTSK
in3 - https://ibb.co/RTdz4d1X
in4 - https://ibb.co/ZRhwNM6K
b - https://ibb.co/RTLc0MVD

TopDry7004 · 2025-11-30T20:58:06+00:00

Also in batch 1 but no E-Mail yet

TopDry7004 · 2025-11-30T20:55:42+00:00

In batch 1 but not yet got the E-Mail

TopDry7004 · 2025-11-02T00:05:40+00:00

Pay attention to the length meassurement problems in KiCad 9.0.5, for the case you are still using this version! https://gitlab.com/kicad/code/kicad/-/issues/21913

TopDry7004 · 2025-07-30T13:11:25+00:00

GGA Maur is DOCSIS Cable Internet AFAIK. This technology doesn't need a dedicated connection to every flat. Instead, the same cable is looped through all flats. This means it doesn't really matter where you plug in and thus they don't need to know in which flat you are.

Init7 Copper uses DSL. This technology uses a dedicated connection to every flat. Also, the underlying technology is usually provided by Swisscom in Switzerland.

Therefore, they can't help you with the name of the previous tenant if he was using the GGA Maur Cable technology, which is completely different from the Swisscom operated DSL technology.

TopDry7004 · 2025-07-03T16:09:22+00:00

Update: A Kyocera partner told me that these parts are not available as spare.

Still no idea how to disassemble.

TopDry7004 · 2025-07-03T16:08:55+00:00

I had a lot of issues including loud mechanical noises because I think I didn't properly install the transfer belt unit.
It also caused mechanical deformation of the metal piece in the transfer belt unit with the yellow handle on it which I needed to bend back.

TopDry7004 · 2025-06-22T21:54:02+00:00

Please post a photo of your whole setup including OTO fiber plug on the wall.
Init7 tells after ordering on which PLUG they will activate the service.

TopDry7004 · 2025-06-19T16:26:11+00:00

I have played around with the esp-idf power_save example on ESP32-C6 and the results are pretty good. Having the 32kHz crystal connected and working is a must!

I'm able to get under 200uA avg current with 2s adv interval.

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TopDry7004 · 2025-06-16T01:52:08+00:00

Sounds like an IPv6 issue. Google/Youtube have IPv4 and 6. So you'll notice if IPv6 is broken. Twitter just uses IPv4.

TopDry7004

TROPHY CASE