Move invertIQ to the 127x. Aligned with latest datasheet

src/modules/SX127x/SX1278.cpp

@@ -538,22 +538,6 @@ int16_t SX1278::setHeaderType(uint8_t headerType, size_t len) {
   return(state);
 }
 
-int16_t SX1278::invertIQ(bool invertIQ) {
-  // check active modem
-  if(getActiveModem() != SX127X_LORA) {
-    return(ERR_WRONG_MODEM);
-  }
-
-  int16_t state;
-  if(invertIQ) {
-    state = _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ, SX127X_REG_INVERT_IQ_ON, 6, 6);
-  } else {
-    state = _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ, SX127X_REG_INVERT_IQ_OFF, 6, 6);
-  }
-
-  return(state);
-}
-
 int16_t SX1278::configFSK() {
   // configure common registers
   int16_t state = SX127x::configFSK();

src/modules/SX127x/SX1278.h

@@ -66,10 +66,6 @@
 #define SX1278_AGC_AUTO_OFF                           0b00000000  //  2     2     LNA gain set by REG_LNA
 #define SX1278_AGC_AUTO_ON                            0b00000100  //  2     2     LNA gain set by internal AGC loop
 
-// SX127X_REG_INVERT_IQ
-#define SX127X_REG_INVERT_IQ_ON                       0b01000000  //  6     6     I and Q signals are inverted    
-#define SX127X_REG_INVERT_IQ_OFF                      0b00000000  //  6     6     normal mode
-
 // SX127X_REG_VERSION
 #define SX1278_CHIP_VERSION                           0x12
 
@@ -299,15 +295,6 @@ class SX1278: public SX127x {
     */
     int16_t explicitHeader();
 
-    /*!
-      \brief Enables/disables Invert the LoRa I and Q signals.
-
-      \param invertIQ Enable (true) or disable (false) LoRa I and Q signals.
-
-      \returns \ref status_codes
-    */
-    int16_t invertIQ(bool invertIQ);
-
 #ifndef RADIOLIB_GODMODE
   protected:
 #endif

src/modules/SX127x/SX127x.cpp

@@ -1190,4 +1190,24 @@ void SX127x::clearFIFO(size_t count) {
   }
 }
 
+int16_t SX127x::invertIQ(bool invertIQ) {
+  // check active modem
+  if(getActiveModem() != SX127X_LORA) {
+    return(ERR_WRONG_MODEM);
+  }
+
+  int16_t state;
+  if(invertIQ) {
+    state = _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ, SX127X_INVERT_IQ_RXPATH_ON, 6, 6);
+    state |= _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ, SX127X_INVERT_IQ_TXPATH_ON, 0, 0);
+    state |= _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ2, SX127X_IQ2_ENABLE);
+  } else {
+    state = _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ, SX127X_INVERT_IQ_RXPATH_OFF, 6, 6);
+    state |= _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ, SX127X_INVERT_IQ_TXPATH_OFF, 0, 0);
+    state |= _mod->SPIsetRegValue(SX127X_REG_INVERT_IQ2, SX127X_IQ2_DISABLE);
+  }
+
+  return(state);
+}
+
 #endif

src/modules/SX127x/SX127x.h

@@ -59,6 +59,7 @@
 #define SX127X_REG_INVERT_IQ                          0x33
 #define SX127X_REG_DETECTION_THRESHOLD                0x37
 #define SX127X_REG_SYNC_WORD                          0x39
+#define SX127X_REG_INVERT_IQ2                         0x3B
 #define SX127X_REG_DIO_MAPPING_1                      0x40
 #define SX127X_REG_DIO_MAPPING_2                      0x41
 #define SX127X_REG_VERSION                            0x42
@@ -122,6 +123,12 @@
 #define SX127X_DETECT_OPTIMIZE_SF_6                   0b00000101  //  2     0     SF6 detection optimization
 #define SX127X_DETECT_OPTIMIZE_SF_7_12                0b00000011  //  2     0     SF7 to SF12 detection optimization
 
+// SX127X_REG_INVERT_IQ
+#define SX127X_INVERT_IQ_RXPATH_ON                    0b01000000  //  6     6     I and Q signals are inverted    
+#define SX127X_INVERT_IQ_RXPATH_OFF                   0b00000000  //  6     6     normal mode
+#define SX127X_INVERT_IQ_TXPATH_ON                    0b00000001  //  0     0     I and Q signals are inverted    
+#define SX127X_INVERT_IQ_TXPATH_OFF                   0b00000000  //  0     0     normal mode
+
 // SX127X_REG_DETECTION_THRESHOLD
 #define SX127X_DETECTION_THRESHOLD_SF_6               0b00001100  //  7     0     SF6 detection threshold
 #define SX127X_DETECTION_THRESHOLD_SF_7_12            0b00001010  //  7     0     SF7 to SF12 detection threshold
@@ -172,6 +179,10 @@
 #define SX127X_SYNC_WORD                              0x12        //  7     0     default LoRa sync word
 #define SX127X_SYNC_WORD_LORAWAN                      0x34        //  7     0     sync word reserved for LoRaWAN networks
 
+// SX127X_REG_INVERT_IQ2
+#define SX127X_IQ2_ENABLE                             0x19        //  7     0     enable optimize for inverted IQ
+#define SX127X_IQ2_DISABLE                            0x1D        //  7     0     reset optimize for inverted IQ
+
 // SX127x series common FSK registers
 // NOTE: FSK register names that are conflicting with LoRa registers are marked with "_FSK" suffix
 #define SX127X_REG_BITRATE_MSB                        0x02
@@ -945,6 +956,15 @@ class SX127x: public PhysicalLayer {
    */
     int16_t getChipVersion();
 
+    /*!
+      \brief Enables/disables Invert the LoRa I and Q signals.
+
+      \param invertIQ Enable (true) or disable (false) LoRa I and Q signals.
+
+      \returns \ref status_codes
+    */
+    int16_t invertIQ(bool invertIQ);
+
 #ifndef RADIOLIB_GODMODE
   protected:
 #endif