add heltec v4.3

variants/heltec_v4/LoRaFEMControl.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <stdint.h>
+
+typedef enum {
+    GC1109_PA,
+    KCT8103L_PA,
+    OTHER_FEM_TYPES
+} LoRaFEMType;
+
+class LoRaFEMControl
+{
+  public:
+    LoRaFEMControl(){ }
+    virtual ~LoRaFEMControl(){ }
+    void init(void);
+    void setSleepModeEnable(void);
+    void setTxModeEnable(void);
+    void setRxModeEnable(void);
+    void setRxModeEnableWhenMCUSleep(void);
+    void setLNAEnable(bool enabled);
+    bool isLnaCanControl(void) { return lna_can_control; }
+    void setLnaCanControl(bool can_control) { lna_can_control = can_control; }
+  private:
+    LoRaFEMType fem_type;
+    bool lna_enabled=false;
+    bool lna_can_control=false;
+};
+