revive MC33816 driver, also support bus sharing #6781

handling loss of power
only:alphax-4k-gdi

firmware/config/boards/hellen/alphax-4K-GDI/connectors/gdi-A.yaml

@@ -25,7 +25,7 @@ pins:
     type: ls
 
   - pin: 6A
-    function: GDI Injector 3 Positive
+    function: GDI Injector 2 Positive
 
   - pin: 7A
     function: GDI Injector 2 Negative
@@ -35,7 +35,7 @@ pins:
     type: ls
 
   - pin: 8A
-    function: GDI Injector 2 Positive
+    function: GDI Injector 1 Positive
 
   - pin: 9A
     function: GDI Injector 1 Negative

firmware/hw_layer/mc33816.cpp

@@ -268,6 +268,10 @@ static THD_FUNCTION(mc33_driver_thread, p) {
 
   while (true) {
     if (!isIgnVoltage()) {
+      if (isInitialized) {
+        efiPrintf("Power loss? Would have to re-init mc33/PT2001?");
+        isInitialized = false;
+      }
       chThdSleepMilliseconds(100);
       continue;
     }