python: RCInput: add Navio+ support

Add check channel number
Add Navio+ entry and auto choice shield

Author: Igor Anokhin

Python/RCInput.py

@@ -1,13 +1,28 @@
-import sys, time
+import time
 
-import navio.rcinput
-import navio.util
+import navio.Common.util
 
-navio.util.check_apm()
+import navio.Navio2.RCInput
+import navio.Navio.RCInput
 
-rcin = navio.rcinput.RCInput()
+READ_ERROR = -1
 
+def get_rcin():
+    if navio.Common.util.get_navio_version() == "NAVIO2":
+
+        return navio.Navio2.RCInput()
+    else:
+        return navio.Navio.RCInput()
+
+
+navio.Common.util.check_apm()
+
+rcin = get_rcin()
 while (True):
     period = rcin.read(2)
-    print period
-    time.sleep(1)
+    if (period != READ_ERROR):
+        print period
+        time.sleep(1)
+    else:
+        exit(READ_ERROR)
+