Diff: main.cpp

Revision:

2:4c5952cf26d0

Parent:

1:c9fae063e6f3

Child:

3:8e50fc7b82b7

--- a/main.cpp	Mon Nov 14 18:27:21 2016 +0000
+++ b/main.cpp	Mon Nov 14 18:39:42 2016 +0000
@@ -31,21 +31,31 @@
 bool smoothing = true; //Determine to activate the moving average         
 
 
-
+//In: nieuwe waarde en hoeveel samples er worden gebruikt
+//Out: moving average van x elementen
+//Explanation:  deze functie 'smooth' de waardes die binnenkomen van
+//              bijvoorbeeld de druksensor. Zoals een condensator,
+//              de smoothing factor kan worden ingesteld door de hoeveelheid 
+//              samples in de moving average aan te passen.
+//              Met maximaal 100 samples.
 float calc_moving_average(float val, int samples = 10){
-    static float sample_arr[samples] = {0}; //[0] is the newest
+    static float sample_arr[100] = {0}; //[0] is the newest
     float moving_average = 0;
-    //Put the new val into the sample_arr and push out the oldest one
-    for(int i=samples-1; i>0; i--){
-        //[9]<-[8]<-[7]
-        sample_arr[i] = sample_arr[i-1];
+    if(samples > 0 && samples < 100){ //Sanity check
+        //Put the new val into the sample_arr and push out the oldest one
+        for(int i=samples-1; i>0; i--){
+            //[9]<-[8]<-[7]
+            sample_arr[i] = sample_arr[i-1];
+        }
+        sample_arr[0] = val;
+        //Calculate the moving average
+        for(int i=0; i<samples; i++){
+            moving_average += sample_arr[i];
+        }
+        return moving_average/(float)samples;
+    } else {
+        return 3.1415926; //Improv error code 
     }
-    sample_arr[0] = val;
-    //Calculate the moving average
-    for(int i=0; i<samples; i++){
-        moving_average += sample_arr[i]   
-    }
-    return moving_average/(float)samples;
 }
 
 int main() {