MESA 7i76e PWM Pin needed on Expansion Connector

It works! I flashed the new firmware with the PWM Pin 1 on P1 and I could add an PWMgen in hal.

Thank you for your help!

Hi Xpertmill
I am very interested b y PWM on expansion ports of 7i76e, do you have any description of what you did?
Which firmware did you load? where did you get it?
Regards

Firmware for the 7I76E is available from Mesa in the 7i76e.zip file:

www.mesanet.com/software/parallel/7i76e.zip

If you don't need all 5 stepgens, its probably more convenient to use
7i76e_7i76x1pD.bit which replaces the fifth stepgen with a PWMgen.
so you have a buffered 5V signal.

Hi PCW! Thank you so much for this quick answer.
Yes I need 5 stepgens.
Sorry I am rather new in linuxcnc world, I still have a lot to learn.
I thought that there are many different firmware for 7i76e depending on which resource we want to use on this board. Am I right? If yes, can you please tell me where can I read about different versions?

if you unzip the linked file, you will see (in configs/hostmot2)
A set of firmware files (filename.bit) and corresponding
pinout files (filename.pin)

The pinout files are text files that list the modules, and pinout of the
corresponding firmware files.

As mentioned earlier in this thread:

"The 7i76e_7i76x1_5abobD.bit config has a PWMGen on pin 1 of expansion
connector P1 and 7i76e_7i76x1_5abobpD.bit has 3 PWMGens on P1 pins
1,3,5 (DB25 pins 1,2,3)

Note that if you use the expansion pins directly, its best to use a series resistor of
say 220 Ohms to prevent negative inputs from damaging the input clamp diodes. "

OK, very clear explanations, as per usual from you.
I'm going to study these files in details.
Thank you so much for spending your precious time helping us.
Best regards