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You can link to this project.

After using a USB-blaster and a ft2232 board, Ive found the ft2232 board to be the more reliable.
After messing around with the colorlight boards I found they needed quite a bit of rework for use.
So I went with a Spartan 6 dev board and some custom boards and I was able to use Mesa 7c81 firmware built to suit.

I just ordered this board and am gathering information. Has anyone tried flashing it with the USB-Altera-Blaster STM-32?

No gigabit is not required, the mesa boards do not support this speed.
As no based thread is required jitter is not a major issue, under 100000ns will work.

Stop overthinking.
With mesa hardware you don't need a base thread, only a servo thread is required. With that, latency isn't such a huge issue either. Trying to get an extra bit here and there does nothing.
The pre made image Rodw recently linked to is perfectly fine to run a machine, the only exception would be if you are using the RPi 5 spi interface to talk to a 7c81 or 7c80 as this requires a driver that isn't included in Rods image , this is not required for ethernet.
Invest more into learning the ins and outs of hal . This is more important that fussing over software as the images provide what is required, remember the only task these images are meant for is running a CNC machine.
If one reads the online docs one will fine some simple exercises that do not require a CNC machine.

Dear jjdege.
How can you solve the error when you install the ethercat package by command "sudo apt install -y linux-headers-(uname -r) ethercat-master linuxcnc-ethercat?

I think we would have to add the motion color into the plot point.
(qt_mismach.py line 287 ish)

Dear jjdege.
How can you solve the error when you install the ethercat package by command "sudo apt install -y linux-headers-(uname -r) ethercat-master linuxcnc-ethercat?