Remora - ethernet NVEM / EC300 / EC500 cnc board

Hi, happy to answer

a) The STM32F407 for the old EC500 is basically complete. Only two pins are available for the QEI hardware module. Software encoder module could be ported over from the Mbed version of Remora if really needed. The switching speed of the optos would need to be checked.

b) The STM version for the NVEM and EC500 was a simple port of the exiting Remora firmware developed for 3D printer controller boards, hence the JSON config file. The RT1052 version is now a simple static config.

c) No have not gotten into other means of flashing the firmware, busy getting the RT1052 version working.

Regarding your last point, earlier in the thread is discussion and work done to use timer driven DMA transfers to step and direction pins. Work stopped on this with the release (and support needed) for the RT1052 version of the board.

very smart on your part, the use of the vector to interact with the modules, I'm studying about.

The end of year craziness is coming to an end and a few hours back in the workshop to work on Remora for the RT1052. Today I've pushed to the dev branch of the repo the latest work to get the VSD PWM -> 0-10V working. I did have this running a while ago with a software PWM version but now this is all done in hardware PWM using the Quad Timer channel on pin D7. I originally thought that the VSD pin was not hardware capable until I started work just to find out that I have traced back to the wrong pin. 

Now to move onto getting the NVMPG serial comms up and running.

Sorry to chime in here, I just found the NVMPG mentioned here. It looks like a nice affordable controller to me, but unfortunately I'm unable to find information about the serial comm protocol. Do you have any documentation on that?

sensille wrote:

Sorry to chime in here, I just found the NVMPG mentioned here. It looks like a nice affordable controller to me, but unfortunately I'm unable to find information about the serial comm protocol. Do you have any documentation on that?

Yes, I reversed engineered it. See this post

forum.linuxcnc.org/18-computer/44828-rem...oard?start=30#233498

and the attachment on the post is an Excel simulator.

Very nice, great work!