1) Add function to VL53L0X.py to show how to call the ST Library dire…

…ctly from Python

2) Update example so time between calls to get_distance is based on device timing

python/VL53L0X.py

@@ -90,3 +90,15 @@ def get_distance(self):
         """Get distance from VL53L0X ToF Sensor"""
         return tof.getDistance()
 
+    # This function included to show how to access the ST library directly
+    # from python instead of through the simplified interface
+    def get_timing(self):
+        Dev = POINTER(c_void_p)
+        Dev = tof.VL53L0X_get_dev()
+        budget = c_uint(0)
+        budget_p = pointer(budget)
+        Status =  tof.VL53L0X_GetMeasurementTimingBudgetMicroSeconds(Dev, budget_p)
+        if (Status == 0):
+            return (budget.value + 1000)
+        else:
+            return 0

python/VL53L0X_example.py

@@ -31,13 +31,16 @@
 
 tof.start_ranging(VL53L0X.VL53L0X_BETTER_ACCURACY_MODE)
 
-for count in range(1,1001):
+timing = tof.get_timing()
+print ("Timing %d ms" % (timing/1000))
+
+for count in range(1,101):
     distance = tof.get_distance()
     if (distance > 0):
         cumul += distance 
         print ("%d mm, %d cm, %.2f avg, %d diff, %.2f from avg, %d count" % (distance, (distance/10), (float(cumul)/count), (last - distance), (float(cumul)/count)-distance, count))
         last = distance
-    time.sleep(0.10)
+    time.sleep(timing/1000000.00)
 
 tof.stop_ranging()