floogen: Align unique ID increments in 2D meshes (#32)

* floogen(pkg): Align address range and index increment

Before, the Id and the address range was not incremented in the same order of X,Y

* doc: Update CHANGELOG

CHANGELOG.md

@@ -17,6 +17,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - System address map was renamed from `AddrMap` to `Sam`.
 - The destination field in the flit header have a new type `dst_t` which is either set to `route_t` for the new source-based routing algorithm, and `id_t` for all the other routing algorithms.
 
+### Fixed
+
+- The generation of the unique ID has been changed resp. aligned for 2D meshes to increment Y-first and X-second. This way the address range and ID increment are consistent with each other.
+
 ## [0.4.0] - 2024-02-07
 
 ### Added

floogen/model/network.py

@@ -427,9 +427,9 @@ def compile_nis(self):
                     ni_dict["addr_range"] = ep_desc.addr_range.model_copy().set_idx(node_idx)
 
                 # 2D array case
-                case (m, _):
+                case (_, n):
                     x, y = self.graph.get_node_arr_idx(ni_name)
-                    idx = y * m + x
+                    idx = x * n + y
                     ni_dict["arr_idx"] = Coord(x=x, y=y)
                     ni_dict["addr_range"] = ep_desc.addr_range.model_copy().set_idx(idx)