updated hall code

FW/leo_muziekdoos_esp32/src/game.cpp

@@ -1,7 +1,12 @@
 #include "game.h"
 
+#include "math.h"
 
-uint64_t last_hall_read;
+
+uint32_t last_hall_read;
+uint16_t last_hall_sample;
+uint8_t hall_idle_count;
+bool hall_is_Idle = true;
 
 void initGame(void)
 {
@@ -14,7 +19,42 @@ void handleGame(void)
   uint32_t timeNow = millis();
   if(timeNow - last_hall_read > HALLINTERVAL)
   {
-      Serial.println(analogRead(HALL_INPUT));
+      uint16_t hall_sample = analogRead(HALL_INPUT);
+      uint16_t hall_delta = (last_hall_sample > hall_sample)?  (last_hall_sample - hall_sample) : (hall_sample - last_hall_sample);
+      if(hall_delta > HALLIDLETHRESHOLD)
+      {
+        if(hall_idle_count > HALLIDLESAMPLES)
+        {
+          hall_is_Idle = false;
+        }
+        else
+        {
+          hall_idle_count++;
+        }
+      }
+      else
+      {
+        if(hall_idle_count == 0)
+        {
+          hall_is_Idle = true;
+        }
+        else
+        {
+          hall_idle_count--;
+        }
+      }
+      Serial.printf("HallSensor: val=%d, delta=%d, count=%d, idle=%s\n",
+                    hall_sample,
+                    hall_delta,
+                    hall_idle_count,
+                    (hall_is_Idle? "yes":"no"));
+      last_hall_sample = hall_sample;
       last_hall_read = timeNow;
+
   }
+}
+
+bool hallIsIdle(void)
+{
+  return hall_is_Idle;
 }