Fix multi bank fueling (#2661)

* add cylinder number

* changelog

* wording

firmware/CHANGELOG.md

@@ -28,6 +28,8 @@ All notable user-facing or behavior-altering changes will be documented in this
 ## Month 202x Release - "Release Name"
 ### Fixed
  - LCD screen works again #2576
+### Added
+ - Per-bank closed loop fuel correction (each cylinder corrected by the sensor that sees its exhaust)
 
 ## April 2021 Release - "Malbec" 
 ### Added

firmware/controllers/algo/event_registry.h

@@ -32,7 +32,8 @@ public:
 	 */
 	bool isSimultanious = false;
 	InjectorOutputPin *outputs[MAX_WIRES_COUNT];
-	int ownIndex = 0;
+	uint8_t ownIndex = 0;
+	uint8_t cylinderNumber = 0;
 	DECLARE_ENGINE_PTR;
 	event_trigger_position_s injectionStart;
 

firmware/controllers/engine_cycle/fuel_schedule.cpp

@@ -106,6 +106,8 @@ bool FuelSchedule::addFuelEventsForCylinder(int i  DECLARE_ENGINE_PARAMETER_SUFF
 	ev->outputs[0] = output;
 	ev->outputs[1] = secondOutput;
 	ev->isSimultanious = isSimultanious;
+	// Stash the cylinder number so we can select the correct fueling bank later
+	ev->cylinderNumber = injectorIndex;
 
 	if (!isSimultanious && !output->isInitialized()) {
 		// todo: extract method for this index math

firmware/controllers/engine_cycle/main_trigger_callback.cpp

@@ -204,7 +204,7 @@ void InjectionEvent::onTriggerTooth(size_t trgEventIndex, int rpm, efitick_t now
 	}
 
 	// Select fuel mass from the correct bank
-	uint8_t bankIndex = CONFIG(cylinderBankSelect[this->ownIndex]);
+	uint8_t bankIndex = CONFIG(cylinderBankSelect[this->cylinderNumber]);
 	float injectionMassGrams = ENGINE(injectionMass)[bankIndex];
 
 	// Perform wall wetting adjustment on fuel mass, not duration, so that