Ensure PIN_ENABLE_CHARGE is high when undocked to allow regen (#113)

Author: olliewalsh

Firmware/LowLevel/src/main.cpp

@@ -690,6 +690,12 @@ bool checkShouldCharge() {
 }
 
 void updateChargingEnabled() {
+    // Always enable for regen when not docked
+    if (status_message.v_charge < 3.0f) {
+        digitalWrite(PIN_ENABLE_CHARGE, HIGH);
+        charging_allowed = false; // For high level status
+        return;
+    }
     if (charging_allowed) {
         if (!checkShouldCharge()) {
             digitalWrite(PIN_ENABLE_CHARGE, LOW);