Remora - ethernet NVEM cnc board

Now that the MCU is removed, the task of tracing the circuit and getting some functionality working. First step is a debug serial output which is working on LPUART 4. I was hoping one of the serial ports was connected to LPUART 1 which would have allowed us to use the FlashLoader tool, but unfortunately we've got LPUART 4 and LPUART 5 routed to the RS232 header and NVMPG Serial connections.

We're definitely on our way with these boards now. 

 

I've also traced the Ethernet PHY connections as well. There's not a lot of good examples using the LAN8720a PHYs with NXP products. I guy in Germany who has the earlier version of the EC500 shared that he has a contact in NXP, and has been kind enough to reach out to their technical support team. Hopefully they come back with some help. 

 

What exactly do you need help with?

ww1.microchip.com/downloads/en/DeviceDoc/8720a.pdf

You can follow the traces to make a schematic.

I have NXP calling me about the i.MX RT1050's.

Bari wrote:

What exactly do you need help with?

ww1.microchip.com/downloads/en/DeviceDoc/8720a.pdf

You can follow the traces to make a schematic.

I have NXP calling me about the i.MX RT1050's.

Schematic is traced, it's now about getting a PHY driver working...

github.com/ARM-software/CMSIS-Driver/tree/main/ETH

www.oryx-embedded.com/doc/lan8720__driver_8c.html

community.nxp.com/t5/i-MX-RT-Knowledge-B...XRT1050/ta-p/1107482

A huge thanks that have helped support on GoFundMe, it won't be in vain. Ethernet is working!!! 

This has been a lot of research and even some "help" from NXP. I could not get a C++ project to work, however when I started with an SDK ping example (C code) modified to run on the Novusun board, success. 

And now success converting that project into a C++ code base, with the board happily replying to ping requests.

I think the most challenging parts of the porting of Remora to the RT1052 are now done (I hope). 

 

Hello. How do I upload the configuration file to the Nvem v2 board? And then how do I run it in linuxcnc? well thank you

Hi, this thread is long but the topic is covered here. May be easier to check out these videos.

People might be wondering how development has been going... Ethernet communication is still an issue. I got all excited when I said I had a working C++ basic Ethernet program working.

The code compiled as basic C, happily replies to ping requests. The same code compiled as C++ will send our ARP requests but will not reply to ARP requests so ping fails. ...?

More head scratching and stepping through code...

I've given up trying to get Ethernet with C++ code working and focused on getting Remora ported to the RT1052. Ethernet communication with LinuxCNC is up and running along with the Servo and Base thread and 6 step generators.

The config is hard coded with the C++ classes converted to functional routines.

This MCU is fast! 6 DDS step generators run in 750ns. This step length is to short for most drivers so I'm running the base thread twice to generator a step. I think we'll get some decent max step frequencies with the software step generation.