Mesa 7i90 in SPI mode

You're welcome. Polling is a fine solution.

To make things really robust you have to make certain you can't get stuck. By this I mean if there is a busy-wait check on some condition(s) one also needs to keep track of how much time is spent waiting and if the maximum interval passes take appropriate error recovery action.

I want test Raspberry Pi 3 with LINUXCNC and SPI PLUTO-P driver . Where I can download image file for PI 3 ?

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hi joe, i tested your driver on a 6 hour job, seems to work really well. you should submit a pull request for it and hopefully itll get merged in to master.

how are your plans with the pine64 moving along?

Hello sleepybishop!

Thank you for running these changes. I am happy to hear your positive result. Could you tell me a bit about your system and job? What kind of machine is it and what speeds do you use? Are you running headless - no native display?

I have seen an occasional SPI Message timeout and am working on optimizing the standard spi-bcm2835.c code.

The Pine64 activity remains only a plan. I have the board running but need to apply the RT patches and enable the SPI device before rebuilding the kernel.

Once again - all the best! Joe

my machine is an ultimaker clone (www.thingiverse.com/thing:811271), i built two of them, im in the process of using them to build drone parts. the job i ran was the main frame. it was printed at 80mm/s with 150mm/s rapids.

im running them with arch linux arm instead of debian mostly as a personal preference of linux distributions and partly because it was easy to add the rt patch to their kernel package build. i run headless because though axis loads it does run a little sluggish and eats up a bunch of ram, so i run linuxcncrsh to send commands over the network, its a little backwards but i hope to make some improvements there in the future.

i have not seen spi message timeouts.

wrt to the pine64, ide love to experiment with these boards as well but seems like the kernels available are a bit behind, though support is slowly trickling into mainline, (linux-sunxi.org/Linux_mainlining_effort)

thanks again!

Hello,
I think I should ask here about jepler's Raspberry Pi adapter oshpark.com/shared_projects/bZNakuZs
I'd never ordered anything from oshpark before, so getting the boards was a nice experience.
Now I'm ready to solder, just need to make sure I do it correct.
Please check the pics

Well I found well hidden "1" near 26pin connector and soldered the adapter correctly.
The board seems to work with Pi 2!

I flashed 7i90 with SPI firmware via EPP on a PC. But what if I want to flash another firmware via EPP? What I understood from the manual:
1. Set W3 down.
2. Power up the board with a backup EPP firmware
3. Set W3 up and flash primary firmware via EPP.
Is this correct?

I would prefer to install mesaflash to Raspberry Pi and flash via SPI, is it possible? Is github.com/micges/mesaflash the correct source?

yes, the mesaflash from github has spi support. something like

mesaflash --device 7i90 --spi --addr /dev/spidev0.0 --write myfile.bit

your mileage may vary depending on kernel support. spi support on the pi has improved with later kernel releases, but depending on your distribution, the spi drivers may be a bit behind the times.

Thanks sleepybishop!

I use the latest RASPBIAN image. But the kernel must be one-year-old, 4.4.4rt9 from machinekit website...
If you know how where to get a more recent rt kernel, please give me a hint.
Compiling a kernel must take eternity on a raspberry...

Anyways, tomorrow I'll try installing mesaflash on Pi.