Future (turbo) expansion board?


7 posts
by Ed Raket » Sun May 20, 2012 11:34 am
Would it be possible to connect a "turbo board" to the GPIO connector? This board could have a quad or octo core ARM chip, 1Gb ram, and wifi. The world is your oyster... :lol:
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by felix123 » Sun May 20, 2012 11:54 am
You can use the turbo board on its own if it is so powerful :D
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by mahjongg » Sun May 20, 2012 12:13 pm
This is already done, using a powerful server communicating with the R-PI over ethernet with an R-PI, which is doing the video rendering, and accepting keyboard and mouse I/O, its called a
"Citrix’s XenDesktop remote desktop", and there was piece about it on the home page a short while ago.
http://www.raspberrypi.org/archives/1222

by the way, the GPIO port probably won't provide enough bandwidth, to do this, so using ethernet is a better choice.
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by Spacefish » Sun May 20, 2012 1:46 pm
why would you connect a more powerfull machine as a "expansion" to a slower machine? But yes it is possible if the other board has GPIO too, you can implement a simple protocol like SPI and exchange data i think :D
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by AndrewS » Mon May 21, 2012 3:09 am
mahjongg wrote:by the way, the GPIO port probably won't provide enough bandwidth, to do this, so using ethernet is a better choice.

Actually, the SPI bus (available on the GPIO connector) is potentially higher-banwidth than Ethernet :)
https://en.wikipedia.org/wiki/Serial_Pe ... erface_Bus
Some ethernet chips actually interface to the host CPU / microcontoller via SPI (unlike the ethernet chip on the Raspi, which interfaces via USB)
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by Gert van Loo » Tue May 22, 2012 8:53 pm
For really high speed use a DSI to CSI connection: 1.2Gbps
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by AndrewS » Wed May 23, 2012 11:25 am
Gert van Loo wrote:For really high speed use a DSI to CSI connection: 1.2Gbps

I thought on the RPi the DSI and CSI interfaces were entirely GPU-side, i.e. not usable by anyone outside Broadcom?
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