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A High-Performance Open Source Oscilloscope: development log & future ideas
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tom66:

--- Quote from: free_electron on January 05, 2021, 04:05:17 am ---If you need layout help ... or a second pair of eyes. ping me.

--- End quote ---

Thanks, free_electron.  I'd certainly appreciate a second pair of eyes for the dual channel DDR3 memory controller when I get to that point.  The single channel one was fine,  but had I not done my extensive design review process (given such a complex board I felt this necessary) I would have missed a fatal error.
tautech:
FE's Altium library is also a very useful resource.  ;)
tom66:
Jetson Nano arrived.  Probably won't be able to look at it properly until the weekend with my current professional  (i.e. pays the bills) workload.  But excited to give it a play.

I've considered just implementing an x1 PCI-e interface now using the M.2 slot - could be done with a small, probably custom PCB adapter and a Zynq devkit with a PCI-e port.  That said, spinning a board may be the only reasonable way forward, don't know until I do some more research.
nctnico:

--- Quote from: tom66 on January 07, 2021, 06:13:28 pm ---Jetson Nano arrived.  Probably won't be able to look at it properly until the weekend with my current professional  (i.e. pays the bills) workload.  But excited to give it a play.

I've considered just implementing an x1 PCI-e interface now using the M.2 slot - could be done with a small, probably custom PCB adapter and a Zynq devkit with a PCI-e port.  That said, spinning a board may be the only reasonable way forward, don't know until I do some more research.

--- End quote ---
That is certainly doable. I have made an M.2 key E (IIRC) to key B/M converter to connect an NVME to the M.2 slot. For the final board I have used an USB type C connector as a cheap way to bring a PCI express bus off board in order to have an external (pluggable) NVME slot. The only downside is that USB type C can be plugged in both ways so the plug needs to have the right orientation. A mini-SAS SFF8087 connector is another option.
tom66:
I've used HDMI ports before for a proprietary interface that needed 4 diff pairs.  I use SATA on this current prototype but there wouldn't be enough lanes for a x1 PCI-e with that unless I used two cables, which could get messy in terms of length matching etc.
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