From 3ec90c02b433e1bd34cf783823cc36a09f24bbf5 Mon Sep 17 00:00:00 2001
From: Sandeep Mistry <sandeep.mistry@gmail.com>
Date: Thu, 21 Dec 2017 20:18:45 -0500
Subject: [PATCH] Stabilize onReceive(...) callback handling
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By using SPI.usingInterrupt(…) and SPI.notUsingInterrupt(…)
---
 src/LoRa.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/LoRa.cpp b/src/LoRa.cpp
index 5fb4256..3d62073 100644
--- a/src/LoRa.cpp
+++ b/src/LoRa.cpp
@@ -283,9 +283,13 @@ void LoRaClass::onReceive(void(*callback)(int))
 
     writeRegister(REG_DIO_MAPPING_1, 0x00);
 
+    SPI.usingInterrupt(digitalPinToInterrupt(_dio0));
     attachInterrupt(digitalPinToInterrupt(_dio0), LoRaClass::onDio0Rise, RISING);
   } else {
     detachInterrupt(digitalPinToInterrupt(_dio0));
+#ifdef SPI_HAS_NOTUSINGINTERRUPT
+    SPI.notUsingInterrupt(digitalPinToInterrupt(_dio0));
+#endif
   }
 }