I have built the hardware and I have some questions

Hello, I have a few questions.I am building a complete computer with fpga and all other boards, and I have some questions:
1. What firmware should I choose, mesa, remora or, write my own?
2. I want a universal solution, so what input/output boards should I design?
3. Should I design my own case or choose a ready-made one?
Here is one of the prototypes:
-32 outputs 24v 0.5A, 32 inputs 24V, four boards
-4 analog servo -10V.. 10V outputs, 4 encoders input, one board
-Fpga 96 IO board with buffers, one board ()
-Firmware - ported and modified mesa for SPI interface.
-software driver - modified hm2 driver from source code.
-3d printed case.
-Computer Raspberry pi 5 aluminum case

all works fine and stable 
   

I'd either go for mesa or riocore, both types will run on a Spartan 6.

Riocore is pretty good in that it has quite a few mesa doesn't support, has also port for a number of different FGPAs. The only issue is that it needs rebuilding of the driver for each time you change to fpga config. RIO also has a Ethernet plugin that uses a w5500, as of yet no plugin for the Ethernet chip used on the Mesa boards.

Mesa is very very mature, one driver is all that is required for changes to fpga if you keep to the standard mesa set of modules. SmartSerial is a big plus as well.

I built a 7c81/7i90 clone using a spartan 6 dev board and some custom PCBs, mesa & riocore firmware both ran fine on it.

Keep up the good work.

It would be great to create a complete, fully open, standardized, and comprehensive solution for LinuxCNC, with open schematics, boards, and enclosures.
If I find the resources to complete the main boards, I will make the completed boards and enclosures, along with the ported firmware source code, publicly available.
Suggestions, advice, and criticism are also welcome.

Mesa is pretty much the standard, firmware sources are open source, as you have found. Pete is rather open with his hardware designs, there are 7i92 clones on Ali express.
If you really want to have a look at well evolved ecosystem I suggest you check out this topic
forum.linuxcnc.org/18-computer/49142-lin...d-on-fpga-ice40-ecp5
This has evolved into the riocore project.
It may be an idea to contact Ollie and discuss enclosures and such. Whilst he has designed some boards his energies are mainly taken up by the firmware and software side.
So rather than another project from scratch, I honestly think offering your hardware skills would be awesome to take that project to the next level.
I'd even like to offer my help, I've been working on a custom RPi5\4 image based on the RPi build system, rather than another build system, that is basically exactly the same to setup on Raspberry Pi as a standard image.

Sorry I pressed submit to early, the discussion is here
forum.linuxcnc.org/9-installing-linuxcnc...encoraged-to-comment

And I'm quite desperate to have at least one person to test.

I mean more user friendly

I mean more user friendly

Completed and full working on Morbidelli Author 400  

 
 

Short video:
youtube.com/shorts/yrjaTZI8PxE?si=LNXiCpHweRAIiDGB
youtube.com/shorts/AHPf1eLegj8?si=d-FsyDOV2K0oBSdJ