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@azonenberg@ioc.exchange
2025-12-24 05:49:03

STM32MP2 XC7K160T PCIe test board progress! 66 unrouted nets in the power supply, but I think it'll fit.
There's something for everybody in this board:
* 0201 passives? Check (under the SoC)
* Lots of FPGA? XC7K160T is decently sized
* Lots of CPU? Dual A35s, a M33, a M0 , and a M4
* High speed? PCIe gen2 and a SFP that is theoretically capable of 8 GT/s but I'm gonna try pushing the FPGA a bit and see if I can make it do 10Gbase-R with acceptable BER…

KiCAD layout view of a dense 4 layer board with multiple BGAs and a spaghetti of signal traces
3D render of the front side of the board, almost completely covered in components except for a small area around the PCIe traces in the southeast
3D render of the back side of the board showing a large number of passives and several smaller ICs
@Mediagazer@mstdn.social
2026-01-24 00:01:21

Late-night TV hosts Jimmy Kimmel and Stephen Colbert criticized FCC Chair Brendan Carr for the FCC's new guidance on "equal time" rules for political candidates (Siladitya Ray/Forbes)
forbes.com/sites/siladit…

@theodric@social.linux.pizza
2025-11-19 17:38:25

Tired. Broken pipe section *and* failed pump *and* dodgy wiring replaced. So far no leaks in evidence, but it needs a good shakedown before I will trust my inner wall with it. In the words of the Hšvamšl:

At kveldi skal dag leyfa
[The day must be praised in the evening]

konu er brennd er
[a woman, when she is cremated,]

mæki er reyndr er
[a sword, when it is proven]

mey er gefin er 
[a maiden, when she is given away]

ís er yfir kømr
[ice, when it is crossed]

öl er drukkit er	
[ale, when it is drunk.]
@azonenberg@ioc.exchange
2025-12-22 08:13:13

468 nets unrouted. Still have to do the FPGA flash, the power supply, bulk caps for the FPGA, and a few other odds and ends but the entire SoC subsystem is basically routed.
So at this point I can already say definitively that routing the STM32MP2 in TFBGA436 on an OSHPark 4-layer board is extremely doable as long as you aren't trying to max the IOs. Using the DDR may or may not be possible (I'm not trying here) but the internal RAM and HyperRAM are enough for a lot of applicat…

KiCAD layout render of a 4-layer board with a large FPGA at the center, a slightly smaller SoC to the east, a SFP+ in the southwest, and a bunch of floating passives not yet hooked up