From 5e17259dbf5e68ba3e072cbb73661579eacc7f48 Mon Sep 17 00:00:00 2001
From: coderask <aarnav@cside.dev>
Date: Mon, 20 Jul 2026 17:29:42 +0100
Subject: [PATCH 1/2] Add Physical Bus Wiring To `GRCAN.CANdo` As `physical
 topology` Section

Import the physical CAN bus topology (which nodes are physically wired to
each bus) from GRCAN-Web's `can_topology.json` into a new hand-editable
`physical topology:` top-level section in `GRCAN.CANdo`.

CANdo is the authoritative source of truth; topology is enforced only in the
web viewer, so no Perl parser consumes this section. Verified inert: all
generated headers are byte-identical before and after the change.

Reconciled against the authoritative `routing` section: added `HV DC-DC` and
`LV DC-DC` to `Primary` (both transmit `DC-DC Status` there per routing, but
were absent from the viewer's `can_topology.json`).
---
 Autogen/CAN/Doc/GRCAN.CANdo | 47 +++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/Autogen/CAN/Doc/GRCAN.CANdo b/Autogen/CAN/Doc/GRCAN.CANdo
index fff052888..d8ee2e98e 100644
--- a/Autogen/CAN/Doc/GRCAN.CANdo
+++ b/Autogen/CAN/Doc/GRCAN.CANdo
@@ -12,6 +12,53 @@ Bus ID:
     id: 3
     max_dlc: 8
 
+# physical topology: which devices are physically wired to each CAN bus.
+# Hand-editable by design. Device names must match the GR ID section and bus
+# names must match the Bus ID section above. Buses omitted here (e.g. Testing)
+# are treated as unrestricted. Mirrors can_topology.json from the GRCAN-Web viewer.
+physical topology:
+  Primary:
+    - ECU
+    - TCM
+    - ACU
+    - DGPS
+    - GR Inv
+    - DTI Inv
+    - Fan Ctrl 1
+    - Fan Ctrl 2
+    - Fan Ctrl 3
+    - EM
+    - Dash Panel
+    - HV DC-DC
+    - LV DC-DC
+  Data:
+    - ECU
+    - TCM
+    - ACU
+    - DGPS
+    - TireTemp FL
+    - TireTemp FR
+    - TireTemp RL
+    - TireTemp RR
+    - BrakeTemp FL
+    - BrakeTemp FR
+    - BrakeTemp RL
+    - BrakeTemp RR
+    - Suspension FL
+    - Suspension FR
+    - Suspension RL
+    - Suspension RR
+    - InboardFloor FL
+    - InboardFloor FR
+    - InboardFloor RL
+    - InboardFloor RR
+  Charger:
+    - CCU
+    - ACU
+    - Charger
+    - IMD
+    - EM
+
 routing:
   messages:
     ACU:

From ce538efcb84eb4fe48895905c172c926f6b23b59 Mon Sep 17 00:00:00 2001
From: Aarnav Koushik <mailtomeask@gmail.com>
Date: Thu, 30 Jul 2026 21:17:36 -0700
Subject: [PATCH 2/2] Remove comment above physical topology section

---
 Autogen/CAN/Doc/GRCAN.CANdo | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Autogen/CAN/Doc/GRCAN.CANdo b/Autogen/CAN/Doc/GRCAN.CANdo
index d8ee2e98e..c2a6f5211 100644
--- a/Autogen/CAN/Doc/GRCAN.CANdo
+++ b/Autogen/CAN/Doc/GRCAN.CANdo
@@ -12,10 +12,6 @@ Bus ID:
     id: 3
     max_dlc: 8
 
-# physical topology: which devices are physically wired to each CAN bus.
-# Hand-editable by design. Device names must match the GR ID section and bus
-# names must match the Bus ID section above. Buses omitted here (e.g. Testing)
-# are treated as unrestricted. Mirrors can_topology.json from the GRCAN-Web viewer.
 physical topology:
   Primary:
     - ECU