From 5237f7420f55ae38d5aa11e9604f48575bc85248 Mon Sep 17 00:00:00 2001
From: Jonas Scharpf <jonas@brainelectronics.de>
Date: Fri, 6 Nov 2020 21:31:11 +0100
Subject: [PATCH] add function to set the IRQ explicitly

---
 RFM69.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/RFM69.cpp b/RFM69.cpp
index 4fd01e4..a77fe38 100644
--- a/RFM69.cpp
+++ b/RFM69.cpp
@@ -549,6 +549,23 @@ void RFM69::setCS(uint8_t newSPISlaveSelect) {
   pinMode(_slaveSelectPin, OUTPUT);
 }
 
+// set the IRQ pin
+bool setIrq(uint8_t newIRQPin) {
+  uint8_t _newInterruptNum = digitalPinToInterrupt(newIRQPin);
+  if (_newInterruptNum == NOT_AN_INTERRUPT) return false;
+#ifdef RF69_ATTACHINTERRUPT_TAKES_PIN_NUMBER
+  _newInterruptNum = newIRQPin;
+#endif
+
+  // disconnect from existing IRQ pin
+  detachInterrupt( _interruptNum );
+
+  _interruptNum = _newInterruptNum;
+  attachInterrupt(_interruptNum, RFM69::isr0, RISING);
+
+  return true;
+}
+
 //for debugging
 #define REGISTER_DETAIL 0
 #if REGISTER_DETAIL