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user/Utility/filter.h

@@ -0,0 +1,21 @@
+#ifndef __filter_h__
+#define __filter_h__
+
+// filter specifications: removing largest and smallest samples
+#define   FILTER_SIZE         2    // size of digital filter
+#define   FILTER_SHIFT        1
+#define   FILTER_END         (FILTER_SIZE+1)
+#define   FILTER_ANX         (FILTER_SIZE+2)
+
+// DELTA filter
+#define   DELTA_FILTER_SIZE   4    // size of digital filter
+#define   DELTA_FILTER_SHIFT  2
+#define   DELTA_FILTER_END    (DELTA_FILTER_SIZE-1)
+#define   DELTA_TIME_ANX      (DELTA_FILTER_SIZE+1)
+
+extern u16 SAMPLES[][FILTER_ANX];
+
+u16 ReadDataFromMovingAverage(u16 channel);
+u16 MovingAverage(u16 voltageBuffer, u16 updateScale, u16 channel);
+
+#endif