updated positional traits to public, so its not upset about dead code.

src/core/communication/motor.rs

@@ -11,7 +11,25 @@ pub struct MotorDriverShaftSpeed {
 }
 
 impl MotorDriverShaftSpeed {
+    pub fn speed_as_rpm(&self) -> f32 {
+        match self.shaft_speed {
+            Some(mut speed) => {
+                match self.unit {
+                    Unit::Radians => {speed /= core::f32::consts::PI * 2.0;}
+                    _ => {}
+                }
 
+                match self.time_scale {
+                    TimeScale::PerSecond => {speed *= 60.0;}
+                    _ => {}
+                }
+                speed
+            }
+            None => {
+                0.0
+            }
+        }
+    }
 }
 
 impl Display for MotorDriverShaftSpeed {