[SX127x] Added ESP8266/ESP32 IRAM attribute

examples/SX127x/SX127x_Channel_Activity_Detection_Interrupt/SX127x_Channel_Activity_Detection_Interrupt.ino

@@ -79,6 +79,9 @@ volatile bool enableInterrupt = true;
 // is detected within timeout period
 // IMPORTANT: this function MUST be 'void' type
 //            and MUST NOT have any arguments!
+#if defined(ESP8266) || defined(ESP32)
+  ICACHE_RAM_ATTR
+#endif
 void setFlagTimeout(void) {
   // check if the interrupt is enabled
   if(!enableInterrupt) {
@@ -115,14 +118,14 @@ void loop() {
 
     // LoRa preamble was detected
     Serial.print(F("[SX1278] Preamble detected!"));
-  
+
   }
-  
+
   // check if we need to restart channel activity detection
   if(detectedFlag || timeoutFlag) {
     // start scanning the channel
     Serial.print(F("[SX1278] Starting scan for LoRa preamble ... "));
-  
+
     // start scanning current channel
     int state = radio.startChannelScan();
     if (state == RADIOLIB_ERR_NONE) {
@@ -131,6 +134,6 @@ void loop() {
       Serial.print(F("failed, code "));
       Serial.println(state);
     }
-  
+
   }
 }

examples/SX127x/SX127x_Receive_Interrupt/SX127x_Receive_Interrupt.ino

@@ -85,6 +85,9 @@ volatile bool enableInterrupt = true;
 // is received by the module
 // IMPORTANT: this function MUST be 'void' type
 //            and MUST NOT have any arguments!
+#if defined(ESP8266) || defined(ESP32)
+  ICACHE_RAM_ATTR
+#endif
 void setFlag(void) {
   // check if the interrupt is enabled
   if(!enableInterrupt) {

examples/SX127x/SX127x_Transmit_Interrupt/SX127x_Transmit_Interrupt.ino

@@ -77,6 +77,9 @@ volatile bool enableInterrupt = true;
 // is transmitted by the module
 // IMPORTANT: this function MUST be 'void' type
 //            and MUST NOT have any arguments!
+#if defined(ESP8266) || defined(ESP32)
+  ICACHE_RAM_ATTR
+#endif
 void setFlag(void) {
   // check if the interrupt is enabled
   if(!enableInterrupt) {