Fast read implementation

crossbow.ino

@@ -487,7 +487,7 @@ void onReceive(int packetSize)
         //We have a packet candidate that might contain a valid QSP packet
         radioState.bytesToRead = packetSize;
         for (int i = 0; i < packetSize; i++) {
-            radioState.data[i] = LoRa.read();
+            radioState.data[i] = LoRa.fastRead();
         }
         radioState.rssi = getRadioRssi();
         radioState.snr = getRadioSnr();

lora.cpp

@@ -238,15 +238,19 @@ int LoRaClass::available()
   return (readRegister(REG_RX_NB_BYTES) - _packetIndex);
 }
 
+int LoRaClass::fastRead() {
+  _packetIndex++;
+  
+  return readRegister(REG_FIFO);
+}
+
 int LoRaClass::read()
 {
   if (!available()) {
     return -1;
   }
 
-  _packetIndex++;
-
-  return readRegister(REG_FIFO);
+  return fastRead();
 }
 
 void LoRaClass::onReceive(void(*callback)(int))

lora.h

@@ -34,6 +34,7 @@ public:
   size_t write(const uint8_t *buffer, size_t size);
   int available();
   int read();
+  int fastRead();
 
   void onReceive(void(*callback)(int));