[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) {

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) {