EFI_MAIN_RELAY_CONTROL draft

firmware/config/stm32f4ems/efifeatures.h

@@ -124,6 +124,11 @@
 
 #define EFI_IDLE_CONTROL TRUE
 
+/**
+ * Control the main power relay based on measured ignition voltage (Vbatt)
+ */
+#define EFI_MAIN_RELAY_CONTROL FALSE
+
 #define EFI_PWM TRUE
 
 #define EFI_VEHICLE_SPEED TRUE

firmware/controllers/core/fsio_impl.cpp

@@ -68,6 +68,10 @@ static LEElement * fuelPumpLogic;
 static LEElement * radiatorFanLogic;
 static LEElement * alternatorLogic;
 
+#if EFI_MAIN_RELAY_CONTROL || defined(__DOXYGEN__)
+static LEElement * mainRelayLogic;
+#endif /* EFI_MAIN_RELAY_CONTROL */
+
 EXTERN_ENGINE
 ;
 
@@ -345,11 +349,16 @@ void runFsio(void) {
 	}
 #endif /* EFI_FUEL_PUMP */
 
+#if EFI_MAIN_RELAY_CONTROL || defined(__DOXYGEN__)
+	if (boardConfiguration->mainRelayPin != GPIO_UNASSIGNED)
+		setPinState("main_relay", &enginePins.mainRelay, mainRelayLogic);
+#else /* EFI_MAIN_RELAY_CONTROL */
 	/**
 	 * main relay is always on if ECU is on, that's a good enough initial implementation
 	 */
 	if (boardConfiguration->mainRelayPin != GPIO_UNASSIGNED)
 		enginePins.mainRelay.setValue(true);
+#endif /* EFI_MAIN_RELAY_CONTROL */
 
 	enginePins.o2heater.setValue(engine->rpmCalculator.isRunning());
 
@@ -498,6 +507,11 @@ void initFsioImpl(Logging *sharedLogger DECLARE_ENGINE_PARAMETER_SUFFIX) {
 	radiatorFanLogic = sysPool.parseExpression(FAN_CONTROL_LOGIC);
 
 	alternatorLogic = sysPool.parseExpression(ALTERNATOR_LOGIC);
+	
+#if EFI_MAIN_RELAY_CONTROL || defined(__DOXYGEN__)
+	if (boardConfiguration->mainRelayPin != GPIO_UNASSIGNED)
+		mainRelayLogic = sysPool.parseExpression(MAIN_RELAY_LOGIC);
+#endif /* EFI_MAIN_RELAY_CONTROL */
 
 #if EFI_PROD_CODE || defined(__DOXYGEN__)
 	for (int i = 0; i < LE_COMMAND_COUNT; i++) {

firmware/controllers/system_fsio.h

@@ -1,6 +1,6 @@
 // this https://en.wikipedia.org/wiki/Reverse_Polish_notation is generated automatically
 // from controllers/system_fsio.txt
-// on 2017-04-25_15_33_33
+// on 2017-06-12_17_45_41
 //
 //
 // in this file we define system FSIO expressions
@@ -23,6 +23,11 @@
 
 // Human-readable: ac_on_switch
 #define AC_RELAY_LOGIC "ac_on_switch"
+// Combined RPM, CLT and VBATT warning light
 
 // Human-readable: (rpm > fsio_setting(2)) | ((coolant > fsio_setting(3)) | (vbatt < fsio_setting(4)))
 #define COMBINED_WARNING_LIGHT "rpm 2 fsio_setting > coolant 3 fsio_setting > vbatt 4 fsio_setting < | |"
+//needed by EFI_MAIN_RELAY_CONTROL
+
+// Human-readable: (time_since_boot < 2) | (vbatt > 5)
+#define MAIN_RELAY_LOGIC "time_since_boot 2 < vbatt 5 > |"

firmware/controllers/system_fsio.txt

@@ -18,3 +18,6 @@ AC_RELAY_LOGIC=ac_on_switch
 
 # Combined RPM, CLT and VBATT warning light
 COMBINED_WARNING_LIGHT=(rpm > fsio_setting(2)) | ((coolant > fsio_setting(3)) | (vbatt < fsio_setting(4)))
+
+#needed by EFI_MAIN_RELAY_CONTROL
+MAIN_RELAY_LOGIC=(time_since_boot < 2) | (vbatt > 5)

simulator/simulator/efifeatures.h

@@ -54,6 +54,7 @@
 
 #define EFI_ENGINE_CONTROL TRUE
 #define EFI_IDLE_CONTROL FALSE
+#define EFI_MAIN_RELAY_CONTROL FALSE
 #define EFI_HIP_9011 FALSE
 #define EFI_ELECTRONIC_THROTTLE_BODY FALSE
 #define EFI_AUX_PID FALSE