LitexCNC: firmware and driver for 5A-75B and 5A-75E

I have soldered these flex bypass.For me was very easy to solder with flux.
Can i use the 5A-75E with this bypass with the simple parallel 5axis breakout board?

No, because the Colorlight boards operate at 5v and the FPGA operates at 3.3v, as I mentioned in my previous post. The bypass boards do nothing to convert voltages.

You'll have to use something similar to what I did, this was for different project but based on how Mesa implements their 3.3v to 5v conversion. You will need to supply 3.9v (3.9v is a common zener value) to 4.2v power to the SN74CBT3245CPWR chips, be aware that these are NOT equivalent to 74LS245, 74HC245.

 

This is why I moved away from the colorlight boards and used a FPGA dev card (only had to change the EEPROM out) to run Mesa firmware. It was far, far less hassle and if I used 7c81 or 7i90 firmware Linuxcnc has proven drivers that work, and the Mesa firmware is tried & proven. So far I have only used SPI & EPP interfaces but am looking at an Ethernet based on Mesa's hardware. Also it gives me the option of using Smart Serial interface cards or Mesa DB25 cards such as the 7i76 (not 7i76e). Also I can directly interface with common run of the mill parallel port break out boards.

In the past when using a Beagle Bone black I made some breakout cards the did the 3.3v to 5v translation. The only thing is the connector is not wired up as per std parallel port numbering, this had to do with the board that fitted to the Beagle Bone Black. Although it may give you an idea of how to use 74lvc245 & 74hc\ls540 in this application. These are very very basic but I used them for a good while.

github.com/ozzyrob/pp_bob_input
github.com/ozzyrob/pp_bob_output


I have nothing against these projects, they are awesome, but I decided to take a different path.

I am controlling a robotic arm using a few servo motors and Litexcnc
Sometimes it is necessary to disable the motors and move the arm manually. In this case, I want to receive the position change from the motor encoder.
Does anyone know how to do this?

@Ehsan
No double posting, already replied to that question.

Because I use color cards as hardware, I thought it would be better to ask this question in this thread