Remora - ethernet NVEM / EC300 / EC500 cnc board

So just over two weeks from order my EC300 arrived. Like the EC500 it is quite well built and like the NVEM 2.1 has the iMX RT1052 onboard. Like the new NVEM it's using a multi layer PCB. Compared to the EC500 it is very similar except for changes to the optocouplers on the inputs and the addition of indicator LEDS for the IO.

There is a 4 pin header and push button next to the Ethernet port. The button is connected to VCC. I was hoping that the 4 pin header was a fully exposed SWD programming port (VCC, SWDIO, SWCLK, GND), but not so. The left hand pin in the picture appears to be connected to the manual reset pin of a voltage supervisor IC.

I'm hoping the middle two pins are the SWDIO and SWCLK, the right hand pin is connected to GND. I'm thinking that due to the external flash memory and I2C EEPROM that the pin count of the RT1052 is maxed out and they are sharing IO with the SWD. Most likely using the push button on power up to change the boot sequence to make the SWD available (like the EC500). Adding this reset circuitry might allow the board to be reset with main power connected. S3 solder pads might need to be closed to connect the reset output to the MCU..?

 

There's little change to trace the circuit without removal of the RT1052 from the board. I've got some solder balls, kapton tape and some SMD clips and super fine probes on the way.

I was hoping that the EC300 would be a similar board layout to the NVEM 2.1. They are similar but MX_Master we'll need to rely on you for the pinout for the NVEM 2.1 !

Aanvragen0903 wrote:

Hello Christian,

Altough its difficult to see on the video, cam out of focus, looks that you give the right commands.

BTW im not Scott.

Sorry for that image missing /media/kunena/emoticons/smile.png

Maybe he has some sugestions.
Will put Remora on my EC500 to see iff its working.

Christian are you Dutch? No, i am German

These NXP chips will be a learning curve for sure. I purchased a clone J-Link OB from Aliexpress and should have read the details. I successfully connected to the RT1052 with the debug probe seeing the Cortex core, but the J-Link OB v7 does not support the Cortex-M7

I'm now on the search for an affordable solution to program and debug. Maybe a CMSIS-DAP might be the solution. Anyone with a good suggestion would be appreciated. More time waiting for things to arrive....

 
 

Looks like I'm going to have a forced break from all Remora development... I had a brain wave to use the J-Link OB to convert my one and only ST-Link V2 to a CMSIS-DAP debugger. The conversion worked, but can I figure out how to use it with the iMX RT1052, well not so straight forward

Not to worry, I can get back to the SKR3 dev work right. I managed to connect my "new" CMSIS-DAP to the STM32H743 with openOCD. Great. But STMCubeIDE cannot use a stand alone openOCD. Only an ST-Link running through openOCD. So no go for the SKR3 work until another ST-Link V2 arrives...

Anyone with pointers / ideas how we can use a CMSIS-DAP with the RT1052 please shout out!