[Morse] Added support for interrupt-based timing

examples/Morse/Morse_Transmit_FM/Morse_Transmit_FM.ino

@@ -28,7 +28,7 @@
 // DIO0 pin:  2
 // RESET pin: 9
 // DIO1 pin:  3
-SX1278 radio = new Module(5, 2, 9, 3);
+SX1278 radio = new Module(10, 2, 9, 3);
 
 // or using RadioShield
 // https://github.com/jgromes/RadioShield

src/protocols/Morse/Morse.cpp

@@ -137,7 +137,7 @@ size_t MorseClient::write(uint8_t b) {
   if(b == ' ') {
     RADIOLIB_DEBUG_PRINTLN(F("space"));
     standby();
-    mod->delay(_wordSpace);
+    mod->waitForMicroseconds(mod->micros(), _wordSpace*1000);
     return(1);
   }
 
@@ -156,16 +156,16 @@ size_t MorseClient::write(uint8_t b) {
     if (code & RADIOLIB_MORSE_DASH) {
       RADIOLIB_DEBUG_PRINT('-');
       transmitDirect(_base, _baseHz);
-      mod->delay(_dashLength);
+      mod->waitForMicroseconds(mod->micros(), _dashLength*1000);
     } else {
       RADIOLIB_DEBUG_PRINT('.');
       transmitDirect(_base, _baseHz);
-      mod->delay(_dotLength);
+      mod->waitForMicroseconds(mod->micros(), _dotLength*1000);
     }
 
     // symbol space
     standby();
-    mod->delay(_dotLength);
+    mod->waitForMicroseconds(mod->micros(), _dotLength*1000);
 
     // move onto the next bit
     code >>= 1;
@@ -173,7 +173,7 @@ size_t MorseClient::write(uint8_t b) {
 
   // letter space
   standby();
-  mod->delay(_letterSpace - _dotLength);
+  mod->waitForMicroseconds(mod->micros(), _letterSpace*1000 - _dotLength*1000);
   RADIOLIB_DEBUG_PRINTLN();
 
   return(1);

src/protocols/Morse/Morse.h

@@ -193,9 +193,9 @@ class MorseClient {
 
     uint32_t _base = 0, _baseHz = 0;
     float _basePeriod = 0.0f;
-    uint16_t _dotLength = 0;
-    uint16_t _dashLength = 0;
-    uint16_t _letterSpace = 0;
+    uint32_t _dotLength = 0;
+    uint32_t _dashLength = 0;
+    uint32_t _letterSpace = 0;
     uint16_t _wordSpace = 0;
 
     // variables to keep decoding state