neu-implementierung. Funktioniert einigermaßen, interferiert aber mit anderen timer-basierten bibliotheken

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

examples/ReceiveDemo/ReceiveDemo.ino

@@ -0,0 +1,24 @@
+/*
+ This sketch demonstrates, how to use the SoftRS485 library.
+ This library makes use of Arduinos timer 1
+ */
+
+#include <SoftRS485.h>
+
+void setup() {
+  Serial.begin(115200);
+
+  init485(2,3,4,5); // library initialization:
+  // connect pin 2 to RO of Max485
+  // connect pin 3 to ^RE of Max485
+  // connect pin 4 to DE of Max485
+  // connect pin 5 to DI of Max485
+
+}
+
+void loop(){
+  if (available485()){ // check if we have received anything
+    Serial.print("messageReceived: ");
+    Serial.println(get485Message()); // read the received message
+  }
+}