adding with APB

[lranders]

We already have several topics covering this subject:

Memory write

Here’s a very simple APB module I created to control a RISC-V processor: Some things I noted: You’re doing full address decoding; don’t do that, just the interesting bits, i.e. 23-2; don’t try to decode bits 0 and 1, you’re handling 32-bits wide data. Just trust that bits 31-24 will be decoded by whatever APB_MTARGET you connect to. module ControlAPB #( parameter SELECT_BIT = 10 )( input wire PCLK ,input wire PRESETN // APB Slave ,input wire …

If that’s not enough, just search for APB and several more will show themselves.

Interestingly though, just how did you break out what I suspect is BIF APBslave3?

You should consider converting your apb_adder instance to HDL+.
Doing so will allow you to add an APB BIF to it and save yourself a lot of headaches.