Added FEM support for Heltec V4.3 R8

variants/heltec_v4_r8/HeltecV4R8Board.cpp

@@ -64,3 +64,21 @@ const char* HeltecV4R8Board::getManufacturerName() const {
   return "Heltec V4 R8 OLED";
 #endif
 }
+
+bool HeltecV4R8Board::setLoRaFemLnaEnabled(bool enable) {
+  if (!loRaFEMControl.isLnaCanControl()) {
+    return false;
+  }
+
+  loRaFEMControl.setLNAEnable(enable);
+  loRaFEMControl.setRxModeEnable();
+  return true;
+}
+
+bool HeltecV4R8Board::canControlLoRaFemLna() const {
+  return true;
+}
+
+bool HeltecV4R8Board::isLoRaFemLnaEnabled() const {
+  return loRaFEMControl.isLNAEnabled();
+}

variants/heltec_v4_r8/HeltecV4R8Board.h

@@ -24,6 +24,9 @@ public:
   void onBeforeTransmit(void) override;
   void onAfterTransmit(void) override;
   void shutdownPeripherals() override;
+  bool setLoRaFemLnaEnabled(bool enable) override;
+  bool canControlLoRaFemLna() const override;
+  bool isLoRaFemLnaEnabled() const override;
   uint16_t getBattMilliVolts() override;
   bool setAdcMultiplier(float multiplier) override {
     if (multiplier == 0.0f) {

variants/heltec_v4_r8/LoRaFEMControl.h

@@ -17,6 +17,7 @@ public:
   void setLNAEnable(bool enabled);
   bool isLnaCanControl(void) { return true; }
   void setLnaCanControl(bool can_control) { }
+  bool isLNAEnabled(void) const { return lna_enabled; }
   LoRaFEMType getFEMType(void) const { return KCT8103L_PA; }
 
 private: