ACM - removed references to MaxSonar LV sonar

git-svn-id: https://arducopter.googlecode.com/svn/trunk@3236 f9c3cf11-9bcb-44bc-f272-b75c42450872

ArduCopterMega/ArduCopterMega.pde

@@ -225,10 +225,8 @@ ModeFilter sonar_mode_filter;
 
 #if SONAR_TYPE == MAX_SONAR_XL
 	AP_RangeFinder_MaxsonarXL sonar(&adc, &sonar_mode_filter);//(SONAR_PORT, &adc);
-#elif SONAR_TYPE == MAX_SONAR_LV
-	// XXX honestly I think these output the same values
-	// If someone knows, can they confirm it?
-	AP_RangeFinder_MaxsonarXL sonar(&adc, &sonar_mode_filter);//(SONAR_PORT, &adc);
+#else
+    #error Unrecognised SONAR_TYPE setting.
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////

ArduCopterMega/defines.h

@@ -62,9 +62,8 @@
 #define GPS_PROTOCOL_AUTO	7
 
 // SONAR types:
-
-#define MAX_SONAR_XL 0
-#define MAX_SONAR_LV 1
+#define MAX_SONAR_UNKNOWN	0
+#define MAX_SONAR_XL		1
 
 // Radio channels
 // Note channels are from 0!