Hyundai longitudinal (CAN): display AEB indicator on non-FCA cars (#29484)

* Hyundai longitudinal (CAN): display AEB indicator on dashboard on non-FCA cars

* clear up comment

---------

Co-authored-by: Shane Smiskol <shane@smiskol.com>
old-commit-hash: 3b01d99d30

selfdrive/car/hyundai/hyundaican.py

@@ -148,6 +148,13 @@ def create_acc_commands(packer, enabled, accel, upper_jerk, idx, lead_visible, s
     "aReqValue": accel,  # stock ramps up and down respecting jerk limit until it reaches aReqRaw
     "CR_VSM_Alive": idx % 0xF,
   }
+
+  # show AEB disabled indicator on dash with SCC12 if not sending FCA messages.
+  # these signals also prevent a TCS fault on non-FCA cars with alpha longitudinal
+  if not use_fca:
+    scc12_values["CF_VSM_ConfMode"] = 1
+    scc12_values["AEB_Status"] = 1  # AEB disabled
+
   scc12_dat = packer.make_can_msg("SCC12", 0, scc12_values)[2]
   scc12_values["CR_VSM_ChkSum"] = 0x10 - sum(sum(divmod(i, 16)) for i in scc12_dat) % 0x10
 
@@ -171,7 +178,7 @@ def create_acc_commands(packer, enabled, accel, upper_jerk, idx, lead_visible, s
       "CR_FCA_Alive": idx % 0xF,
       "PAINT1_Status": 1,
       "FCA_DrvSetStatus": 1,
-      "FCA_Status": 1, # AEB disabled
+      "FCA_Status": 1,  # AEB disabled
     }
     fca11_dat = packer.make_can_msg("FCA11", 0, fca11_values)[2]
     fca11_values["CR_FCA_ChkSum"] = hyundai_checksum(fca11_dat[:7])