EMC2 running on Raspberry Pi?

jmelson wrote: Why? Machinekit already runs on the Beagle Bone, which has much more GPIO plus the
PRU processors to vastly accelerate step generation and other tasks.

The Pi has rather more of a following than the Bone, which may mean that there is quite a lot of interest.
The Pi also has a rather more capable graphics system, it handles GUIs rather better than the 'Bone, the Machinekit guys seem to be moving towards separate PCs for the display.
I believe that Munkie has written a driver uses a low level DMA interrupt to generate step pulses which at least partly compensates for the lack of PRU.

I am not sure what realtime subsystem Mungkie is running with.

It does sound nice...but tbh i'm not much of a kickstarter fan.

But i might be interested in the final version if it actually works good.

Andy ? :
Is it really th case that Rasperry is faster than the beagle bone black ? I thought the opposite.
Because i am thinking of Linuxcnc Version for Lathes where I have 2 Axis and some pins which are nit time critical so
it looks that i have to wait till we see finished solution i guess.

thx
thomas

tkamsker wrote: Is it really th case that Rasperry is faster than the beagle bone black ?

No, the BBB is faster than the Pi and has lots more IO. But the Pi has better graphics.

There is a good comparison here: makezine.com/magazine/how-to-choose-the-...or-beaglebone-black/

The Pi can do 1080P and (more importantly) OpenGL, so can just about manage the Axis GUI. I don't _think_ that the BBB can do the Axis GUI at all, but I may be wrong.

The TI Sitara used on BBB has a PowerVR SGX graphics core. It should be capable to accelerate OpenGL, so if it cannot it must be a software issue?

Indeed, it IS a software issue. The details of the gfx hardware are TI proprietary, and they will
not release the info to the Linux developers, so there's no Linux driver for that section of
the chip. They say they will be releasing a driver for the Linux kernel in 2017 (YES, not a
typo!!) By that time, the BBB will almost certainly be obsolete, and the smart phones
will long ago have moved to the next chip.

I could NOT believe they actually said this in public. (It is somewhere on the beagle board
forums.)

Jon