
error: Cannot set the value of i.back because it is an input with type inv &uint<4>
   ┌─ ports.py:8
   │
 8 │ s.i.back = 0
   │ ^^^^^^^^^^^^ i.back cannot be set

  Help: The field has type inv &uint<4>
  Help: Since this is an input, only signals with non-inv type can be set

