non blocking functions added

Author: Lang, Samuel

examples/LoRaSenderNonBlocking/LoRaSenderNonBlocking.ino

@@ -0,0 +1,40 @@
+#include <SPI.h>
+#include <LoRa.h>
+
+int counter = 0;
+
+void setup()
+{
+  Serial.begin(9600);
+  while (!Serial)
+    ;
+
+  Serial.println("LoRa Sender");
+
+  if (!LoRa.begin(915E6))
+  {
+    Serial.println("Starting LoRa failed!");
+    while (1)
+      ;
+  }
+}
+
+void loop()
+{
+  if (LoRa.isTransmitting())
+  {
+    delay(100);
+    Serial.print('w');
+    return;
+  }
+  Serial.print("\nSending packet: ");
+  Serial.println(counter);
+
+  // send packet
+  LoRa.beginPacket();
+  LoRa.print("hello ");
+  LoRa.print(counter);
+  LoRa.endPacketasync();
+
+  counter++;
+}

src/LoRa.cpp

@@ -152,6 +152,26 @@ int LoRaClass::endPacket()
   return 1;
 }
 
+void LoRaClass::endPacketasync()
+{
+  // put in TX mode
+  writeRegister(REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_TX);
+  // apparently this grace time is required for the radio
+  delayMicroseconds(150);
+}
+
+bool LoRaClass::isTransmitting()
+{
+  if ((readRegister(REG_OP_MODE) & MODE_TX) == MODE_TX)
+    return true;
+
+  if (!(readRegister(REG_IRQ_FLAGS) & IRQ_TX_DONE_MASK) == 0)
+    // clear IRQ's
+    writeRegister(REG_IRQ_FLAGS, IRQ_TX_DONE_MASK);
+
+  return false;
+}
+
 int LoRaClass::parsePacket(int size)
 {
   int packetLength = 0;

src/LoRa.h

@@ -23,6 +23,8 @@ class LoRaClass : public Stream {
 
   int beginPacket(int implicitHeader = false);
   int endPacket();
+  void endPacketasync();
+  bool isTransmitting();
 
   int parsePacket(int size = 0);
   int packetRssi();