On 05/28/2017 09:20 PM, Bertho Stultiens wrote:
> Well, I'n now in the position that I can report the following:
> ...
> Starting LinuxCNC...
> Starting LinuxCNC server program: linuxcncsvr
> Loading Real Time OS, RTAPI, and HAL_LIB modules
> Starting LinuxCNC IO program: io
> Found file(REL): ./hm2-7i90-stepper.hal
> Note: Using POSIX realtime
> hm2: loading Mesa HostMot2 driver version 0.15
> Invalid cookie
> Read: 00000000 00000000 00000000 00000000
> hm2_rpspi: rtapi_app_main: No such device (-19)
> ...
I can also confirm that the SPI interface is running at 50MHz and not
32MHz. This means I can, apparently, reproduce the problem.
In my preliminary tests, I think I've seen a 32MHz clock, but that might
have been an error in measurement.
The attached images are CS (yellow) CLK (blue) and MOSI (purple)(*). The
interface sends 32-bit in 4 discrete 8-bit blocks with a 30ns pause in
between. Each 32-bit word is spaced by ~800ns.
Now I can start hacking code and see if it can be fixed in some way.
(*) all the noise is due to long wires and such. There is no load on the
I/O pins, just the scope (Tektronix DPO2024B, 200MHz BW/1GS/s and
matched 1:10 probes).
--
Greetings Bertho
(disclaimers are disclaimed)
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