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I spent about a month working with the STM32H747I-DISCO Discovery board.? It has good debugging capabilities. My goal was to get a mockup of the T41 code running on the dual core processor, with DSP

I agree. The T41 development time would have been years less if there was a decent debugger. I can't believe that the Arduino people don't have the talent to incorporate a debugger in the IDE. Jack,

My experience with the display is different (better) because I made changes to the design while still using the same display driver IC. The display problems I was referring to are V12 only.? Basic

It’s a pretty solid machine but that is without plugging it in yet… so don’t know exactly what will happen long term. I did get the circuit board making kit and the example is a LED board with

Got the laser attachment and the rotating 4th axis as well… Uses G-code so compatible with a lot of systems and sortwares. Works with aluminum, wood, plastic, glass, etc. Can’t wait to try it! Dr.

Sounds like you got a good machine.? I'm guessing your experience will go better than mine.? I tried this with a budget CNC a year ago.? After a bit of a learning curve and some small successes, I

Looking back at my notes, I see I misspoke: With a long display cable, the v12 code hangs while trying to start the RA8875 object in the setup routine.

------------------------------------------------------------------------------------------------ I don't have anything useful to add other than that looks like a fantastic machine and I want to hear

Different communication bus. I2C vs. SPI. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner –

“No one complained about display issues that I can recall.” You might review the posts from fall two years ago to refresh your memory when Al with a group of others was working on ways to calm the

I've tested this.? The T41 doesn't get to the setup routine when a long display cable is used.? It gets stuck trying to create the RA8875 object.

I'm just wondering if the current design gets all it can from the default driver setting.? My tests show that crosstalk is a problem on the display cable and that modifying the SPI signal order on it

... and the receiver doesn't come on like it does if there's no display cable installed ...

I just made a 20' cable. It works fine for the front panel buttons, but when I install it for the display the screen doesn't come on. Is that useful information, or did everyone expect that?

Hi Terrance- The original V11 Main board design uses a driver IC for the SPI bus which drives the display.? Same for the original kits.? No one complained about display issues that I can recall.

Routing has already been optimized… with the 4-layer board. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton,

Plugs DIRECTLY into the display connector on the MAIN board and sits OVER the MAIN BOARD like the picture below: Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner

I'll try mine out with a very long cable as well. Regarding future Main board designs, has routing the SPI traces to minimize crosstalk been considered?

In your case, try out a LONG cable… say 3 feet and see if that works. If it does, I’ll start mass-producing them… and possibly get Oliver to place the circuitry on a V12.7 main board for future

Bill, My system is working and without freeze-ups, but I will try out your board. Al