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Re: [LUG] Recommendations for low power proxy/NAS box


On 06/01/17 06:04, Gordon Henderson via list wrote:
On Thu, 5 Jan 2017, M. J. Everitt via list wrote:

Correct me if I'm wrong, but I thought the Broadcom chipset didn't have
any high-bandwidth IO silicon in it (they're only set-top-box SoC's
iirc) .. otherwise they would probably have used them on the Pi from day
1 ...

The SoC has stupidly high IO speeds (relatively speaing) - the CSI and DSI interfaces for example. The down-side is that you need to know how to write code to run in the GPU to access them at those speeds. I know that there was a bit of a test project to transfer data between 2 pi's using them for example... Same for the GPIO pins - Gert's VGA adapter using them - I've no idea the actual data rate needed to generate HDMI video using it, but again, the issue is writing code that lives in the GPU - and that's where Broadcom (and others) have issues - no public documentation without heavy NDAs and commitments to buy a million of them...

So we're limited to what the SoC builders can give us...

Once upon a time there was an ARM with a PCI slot - the Acorn Phoebe...


There are some fairly simple examples of GPU hosted code (/opt/vc/src) however if Gerts VGA adapter is using the GPIO pins I'd guess they can go at a fair lick!
Tom te tom te tom

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