Fix preamble detected IRQ flag (#6653)

src/mesh/LR11x0Interface.cpp

@@ -247,8 +247,8 @@ template <typename T> void LR11x0Interface<T>::startReceive()
     lora.setPreambleLength(preambleLength); // Solve RX ack fail after direct message sent.  Not sure why this is needed.
 
     // We use a 16 bit preamble so this should save some power by letting radio sit in standby mostly.
-    // Furthermore, we need the PREAMBLE_DETECTED and HEADER_VALID IRQ flag to detect whether we are actively receiving
-    int err = lora.startReceive(RADIOLIB_LR11X0_RX_TIMEOUT_INF, RADIOLIB_IRQ_RX_DEFAULT_FLAGS, RADIOLIB_IRQ_RX_DEFAULT_MASK, 0);
+    int err =
+        lora.startReceive(RADIOLIB_LR11X0_RX_TIMEOUT_INF, MESHTASTIC_RADIOLIB_IRQ_RX_FLAGS, RADIOLIB_IRQ_RX_DEFAULT_MASK, 0);
     assert(err == RADIOLIB_ERR_NONE);
 
     RadioLibInterface::startReceive();

src/mesh/RadioLibInterface.h

@@ -16,6 +16,9 @@
 
 #define RADIOLIB_PIN_TYPE uint32_t
 
+// In addition to the default Rx flags, we need the PREAMBLE_DETECTED flag to detect whether we are actively receiving
+#define MESHTASTIC_RADIOLIB_IRQ_RX_FLAGS (RADIOLIB_IRQ_RX_DEFAULT_FLAGS | (1 << RADIOLIB_IRQ_PREAMBLE_DETECTED))
+
 /**
  * We need to override the RadioLib ArduinoHal class to add mutex protection for SPI bus access
  */

src/mesh/SX126xInterface.cpp

@@ -277,8 +277,7 @@ template <typename T> void SX126xInterface<T>::startReceive()
     setStandby();
 
     // We use a 16 bit preamble so this should save some power by letting radio sit in standby mostly.
-    // Furthermore, we need the PREAMBLE_DETECTED and HEADER_VALID IRQ flag to detect whether we are actively receiving
-    int err = lora.startReceiveDutyCycleAuto(preambleLength, 8, RADIOLIB_IRQ_RX_DEFAULT_FLAGS | RADIOLIB_IRQ_PREAMBLE_DETECTED);
+    int err = lora.startReceiveDutyCycleAuto(preambleLength, 8, MESHTASTIC_RADIOLIB_IRQ_RX_FLAGS);
     if (err != RADIOLIB_ERR_NONE)
         LOG_ERROR("SX126X startReceiveDutyCycleAuto %s%d", radioLibErr, err);
     assert(err == RADIOLIB_ERR_NONE);

src/mesh/SX128xInterface.cpp

@@ -260,8 +260,7 @@ template <typename T> void SX128xInterface<T>::startReceive()
 #endif
 #endif
 
-    // We use the PREAMBLE_DETECTED and HEADER_VALID IRQ flag to detect whether we are actively receiving
-    int err = lora.startReceive(RADIOLIB_SX128X_RX_TIMEOUT_INF, RADIOLIB_IRQ_RX_DEFAULT_FLAGS | RADIOLIB_IRQ_PREAMBLE_DETECTED);
+    int err = lora.startReceive(RADIOLIB_SX128X_RX_TIMEOUT_INF, MESHTASTIC_RADIOLIB_IRQ_RX_FLAGS);
 
     if (err != RADIOLIB_ERR_NONE)
         LOG_ERROR("SX128X startReceive %s%d", radioLibErr, err);