Hi everyone,

I'm having trouble accessing the internal UFM in a Lattice MachXO 
device.

Here’s what I’ve tried so far:

First, I created my own Wishbone master, UFM controller, and integrated 
them with the EFB block. The UFM controller is essentially a state 
machine that reacts to inputs from the EFB block. It sends a sequence of 
addresses followed by the required commands and operands.

The communication flow looks like this:

Other modules → UFM Controller → Wishbone Master → EFB Block

However, I didn’t observe any activity on the UFM.

So I tried a different approach using Mico8. I wrote a C program and 
first verified the setup using GPIO, which worked correctly and 
confirmed that the integration with the RTL modules was fine.

Next, I added the EFB block configured for Wishbone and inserted test 
points in the C program to check whether the code was getting stuck 
anywhere. The program successfully passed all the test points, but there 
was still no response from the UFM.

I also used the UFM library available in LMS.

At this point, I’m starting to suspect that the internal UFM hardware 
might not be functioning or enabled properly.

Has anyone encountered a similar issue or have suggestions on what I 
might be missing?

Also, could someone share the correct configuration settings in the 
IPexpress GUI for enabling and accessing the UFM through the EFB block?

cheers!

AM