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by Imre
Tue Apr 24, 2018 11:33 am
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 22
Views: 4955

Re: High bandwidth interface to FPGA?

I have been thinking about a model on the Cray 1/2 made from Zero's. Using the header in SMI mode as a high speed interface. It sounds an also very interesting project. ;) Other high speed interfaces are the CSI/DSI ports. Low voltage differential signals can be quite fast ;) Easier to get to these...
by Imre
Mon Apr 23, 2018 10:57 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

I meant, that can you have both the CM3 and the expansion card installed at the same time? As I see, the inner socket is taller than the other. Is this displacment enough for it?
by Imre
Mon Apr 23, 2018 10:45 pm
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 22
Views: 4955

Re: High bandwidth interface to FPGA?

Thank you for linking ultibo. It seems to be a definitely useful thing. Especially if all else fails. :) You have not said what you are using the FPGA for, do you need Linux? I have not said that I use FPGA. It was said by the author of this thread. ;) I am just also interested in the potential of S...
by Imre
Sun Apr 22, 2018 8:08 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

Very nice! How can you insert an expansion card if CM3 slot is populated? Are there enough space?
And what is the main goal of this board?
by Imre
Tue Mar 20, 2018 9:52 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

It would not be a typical distributed system, rather a heterogeneous computing, with a common (and only one) OS running on it.

To be honest, I don't know it is possible or not. We'll see.

I think it's time to play a little bit with my Pi3B and FPGA boards together. :)
by Imre
Tue Mar 20, 2018 5:01 pm
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 22
Views: 4955

Re: High bandwidth interface to FPGA?

Thanks for the answers! These seem to be useful. :)
But I am affraid, I have to dig quite deep into linux. :roll:
by Imre
Mon Mar 19, 2018 11:13 pm
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 22
Views: 4955

Re: High bandwidth interface to FPGA?

Hi Gavinmc,

I've read the topic you linked, and there was a discussion about to make the SMI documentation public. I checked the Github repo, but could not find it. Maybe I did something wrong.
Do you know it was/still is available somewhere?
I am also interesed in this peripheral. ;)

Thanks,
Imre
by Imre
Tue Feb 27, 2018 10:51 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

I found this: This is definitely not a board, what I would like to design, but at least, it exists. :) By my understanding, it is 'nothing more' than integrating CMs and Ethernet switch on one PCB. But in the other hand, still interesting. What are your opinions? Sorry, but how is this related to R...
by Imre
Tue Feb 27, 2018 10:34 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

Why was my last post completely removed from this topic? It was not (could not be) an advertisment! I found this: https://forum.pine64.org/showthread.php?tid=5461 This is definitely not a board, what I would like to design, but at least, it exists. :) By my understanding, it is 'nothing more' than i...
by Imre
Mon Sep 04, 2017 10:32 pm
Forum: Compute Module
Topic: Compute Module Super Computer/Cluster
Replies: 24
Views: 37740

Re: Compute Module Super Computer/Cluster

Hi Everybody,

Are there anybody how really built a multi-CM based system? I've read quite many plans and 'wishes', but not a physical one... :)
by Imre
Mon Jul 24, 2017 7:49 am
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

Not even an idea? ;) I am currently thinking what kind of functionalities should be implemented on the expansion boards (cards/modules). I've made some research on the internet yet to gather some inspirations, but still nothing impressive I could find. But I don't give it up. :) Project is only maki...
by Imre
Mon Jul 17, 2017 11:19 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

Hi mikronauts, Imre, I am probably stating the obvious here... 1) You do realise the CM3's pins do not form a "bus" in computer terms? It would be possible to emulate one, but it would be painfully slow. I did. My 'secret weapon' would be reverse engineering of the not publicly documented SMI. If I ...
by Imre
Mon Jul 17, 2017 10:54 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

Do you have any public information about your project? I've startet designing my own baseboard following such an 'expansion' idea. What I did is quite simple: 1.8V socket for the CM3 and a 2.5V socket for the expansion board. As you know: DDR sockets are available for different voltages. The slot in...
by Imre
Sun Jul 16, 2017 7:10 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Re: Expandable baseboard (slot system) for CM3

Yes, you are right. Identification of inserted boards needs some kind of (probably) tricky mechanism. We'll see. :) But I like to use the same sockets on the baseboard (in this case DDR2 SODIMMs, because of the CM3), not to restrict the possible 'card' configuration by using physically different soc...
by Imre
Sun Jul 16, 2017 2:10 pm
Forum: Compute Module
Topic: Expandable baseboard (slot system) for CM3
Replies: 30
Views: 17747

Expandable baseboard (slot system) for CM3

Hi Everyone! First of all, I didn't want to open an 'n+1' topic, but I could not find any definitely similar one. Of course, there are similar topics, but I found them rater focusing on making 'only' parallel Pi platforms, not 'distributed' systems consisting different hardware components. It is my ...

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