From 9d3a2bb72f0d0689a6d4049716a35367dea11667 Mon Sep 17 00:00:00 2001
From: jgromes <jan.gromes@gmail.com>
Date: Sat, 8 Apr 2023 21:45:15 +0200
Subject: [PATCH] [SX128x] Added IQ inversion (#724)

---
 src/modules/SX128x/SX128x.cpp | 13 +++++++++++++
 src/modules/SX128x/SX128x.h   |  9 +++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/modules/SX128x/SX128x.cpp b/src/modules/SX128x/SX128x.cpp
index 3456e7c3..5a2619c8 100644
--- a/src/modules/SX128x/SX128x.cpp
+++ b/src/modules/SX128x/SX128x.cpp
@@ -1283,6 +1283,19 @@ uint8_t SX128x::randomByte() {
   return(0);
 }
 
+int16_t SX128x::invertIQ(bool invertIQ) {
+  if(getPacketType() != RADIOLIB_SX128X_PACKET_TYPE_LORA) {
+    return(RADIOLIB_ERR_WRONG_MODEM);
+  }
+
+  uint8_t invert = RADIOLIB_SX128X_LORA_IQ_STANDARD;
+  if(invertIQ) {
+    invert = RADIOLIB_SX128X_LORA_IQ_INVERTED;
+  }
+
+  return(setPacketParamsLoRa(_preambleLengthLoRa, _headerType, _payloadLen, _crcLoRa, invert));
+}
+
 #if !defined(RADIOLIB_EXCLUDE_DIRECT_RECEIVE)
 void SX128x::setDirectAction(void (*func)(void)) {
   // SX128x is unable to perform direct mode reception
diff --git a/src/modules/SX128x/SX128x.h b/src/modules/SX128x/SX128x.h
index a3600f32..1aac8c74 100644
--- a/src/modules/SX128x/SX128x.h
+++ b/src/modules/SX128x/SX128x.h
@@ -829,6 +829,15 @@ class SX128x: public PhysicalLayer {
    */
     uint8_t randomByte();
 
+    /*!
+      \brief Enable/disable inversion of the I and Q signals
+
+      \param invertIQ QI inversion enabled (true) or disabled (false);
+
+      \returns \ref status_codes
+    */
+    int16_t invertIQ(bool invertIQ);
+
     #if !defined(RADIOLIB_EXCLUDE_DIRECT_RECEIVE)
     /*!
       \brief Dummy method, to ensure PhysicalLayer compatibility.