From 7de4a4693e69538994926c4b6460f92151e2ad5e Mon Sep 17 00:00:00 2001
From: jgromes <jan.gromes@gmail.com>
Date: Fri, 15 Sep 2023 18:10:47 +0200
Subject: [PATCH] [HAL] Disable EEPROM on Arduino Due

---
 src/ArduinoHal.cpp                | 40 ++++++++++++++++++-------------
 src/BuildOpt.h                    |  1 +
 src/protocols/LoRaWAN/LoRaWAN.cpp |  4 ++++
 3 files changed, 28 insertions(+), 17 deletions(-)

diff --git a/src/ArduinoHal.cpp b/src/ArduinoHal.cpp
index 69b8d90d..b1d4a92f 100644
--- a/src/ArduinoHal.cpp
+++ b/src/ArduinoHal.cpp
@@ -2,7 +2,9 @@
 
 #if defined(RADIOLIB_BUILD_ARDUINO)
 
+#if !defined(RADIOLIB_EEPROM_UNSUPPORTED)
 #include <EEPROM.h>
+#endif
 
 ArduinoHal::ArduinoHal(): RadioLibHal(INPUT, OUTPUT, LOW, HIGH, RISING, FALLING), spi(&RADIOLIB_DEFAULT_SPI), initInterface(true) {}
 
@@ -101,27 +103,31 @@ void inline ArduinoHal::spiEnd() {
 }
 
 void ArduinoHal::readPersistentStorage(uint32_t addr, uint8_t* buff, size_t len) {
-  #if defined(RADIOLIB_ESP32)
-    EEPROM.begin(RADIOLIB_HAL_PERSISTENT_STORAGE_SIZE);
-  #endif
-  for(size_t i = 0; i < len; i++) {
-    buff[i] = EEPROM.read(addr + i);
-  }
-  #if defined(RADIOLIB_ESP32)
-    EEPROM.end();
+  #if !defined(RADIOLIB_EEPROM_UNSUPPORTED)
+    #if defined(RADIOLIB_ESP32)
+      EEPROM.begin(RADIOLIB_HAL_PERSISTENT_STORAGE_SIZE);
+    #endif
+    for(size_t i = 0; i < len; i++) {
+      buff[i] = EEPROM.read(addr + i);
+    }
+    #if defined(RADIOLIB_ESP32)
+      EEPROM.end();
+    #endif
   #endif
 }
 
 void ArduinoHal::writePersistentStorage(uint32_t addr, uint8_t* buff, size_t len) {
-  #if defined(RADIOLIB_ESP32)
-    EEPROM.begin(RADIOLIB_HAL_PERSISTENT_STORAGE_SIZE);
-  #endif
-  for(size_t i = 0; i < len; i++) {
-    EEPROM.write(addr + i, buff[i]);
-  }
-  #if defined(RADIOLIB_ESP32)
-    EEPROM.commit();
-    EEPROM.end();
+  #if !defined(RADIOLIB_EEPROM_UNSUPPORTED)
+    #if defined(RADIOLIB_ESP32)
+      EEPROM.begin(RADIOLIB_HAL_PERSISTENT_STORAGE_SIZE);
+    #endif
+    for(size_t i = 0; i < len; i++) {
+      EEPROM.write(addr + i, buff[i]);
+    }
+    #if defined(RADIOLIB_ESP32)
+      EEPROM.commit();
+      EEPROM.end();
+    #endif
   #endif
 }
 
diff --git a/src/BuildOpt.h b/src/BuildOpt.h
index 82c777a1..22a1110e 100644
--- a/src/BuildOpt.h
+++ b/src/BuildOpt.h
@@ -117,6 +117,7 @@
   // Arduino Due
   #define RADIOLIB_PLATFORM                           "Arduino Due"
   #define RADIOLIB_TONE_UNSUPPORTED
+  #define RADIOLIB_EEPROM_UNSUPPORTED
 
 #elif (defined(NRF52832_XXAA) || defined(NRF52840_XXAA)) && !defined(ARDUINO_ARDUINO_NANO33BLE)
   // Adafruit nRF52 boards
diff --git a/src/protocols/LoRaWAN/LoRaWAN.cpp b/src/protocols/LoRaWAN/LoRaWAN.cpp
index 679d76b6..56fe4ea0 100644
--- a/src/protocols/LoRaWAN/LoRaWAN.cpp
+++ b/src/protocols/LoRaWAN/LoRaWAN.cpp
@@ -7,6 +7,10 @@
 // flag to indicate whether we have received a downlink
 static volatile bool downlinkReceived = false;
 
+#if defined(RADIOLIB_EEPROM_UNSUPPORTED)
+  #warning "Persistent storage not supported!"
+#endif
+
 // interrupt service routine to handle downlinks automatically
 #if defined(ESP8266) || defined(ESP32)
   IRAM_ATTR