Fixed compression change effect during respiration

Only before every respiration, the compression value will take effect.
This will prevent unwanted behavior when the user change the compression during respiration.
Code was tested on the ambovent.
Runned clang format.

Author: nimrod46

3-Software/Arduino/ventilation_machine/ventilation_machine.ino

@@ -1101,14 +1101,17 @@ void read_IO()
             }
         }
     }
-    range_factor = perc_of_lower_volume
-                   + (Compression_perc - perc_of_lower_vol_display) * (100 - perc_of_lower_volume)
-                         / (100 - perc_of_lower_vol_display);
-    range_factor = range_factor / 100;
-    if (range_factor > 1)
-        range_factor = 1;
-    if (range_factor < 0)
-        range_factor = 0;
+    if (is_starting_respiration())
+    {
+        range_factor = perc_of_lower_volume
+                       + (Compression_perc - perc_of_lower_vol_display)
+                             * (100 - perc_of_lower_volume) / (100 - perc_of_lower_vol_display);
+        range_factor = range_factor / 100;
+        if (range_factor > 1)
+            range_factor = 1;
+        if (range_factor < 0)
+            range_factor = 0;
+    }
 
 #if (pressure_sensor_available == 1)
     {
@@ -1131,6 +1134,11 @@ void read_IO()
         wanted_cycle_time = cycleTime;
 }
 
+bool is_starting_respiration()
+{
+    return index == 0;
+}
+
 void send_data_to_monitor()
 {
     if (monitor_index == 0)