Zdenka Šibíková / Mbed 2 deprecated FRDM_MMA8451Q

cv1

Dependencies:   MMA8451Q mbed

Diff: Samplefilter.h

Revision:
1:1567f5a4e96f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Samplefilter.h	Mon Oct 30 16:12:27 2017 +0000
@@ -0,0 +1,34 @@
+#ifndef SAMPLEFILTER_H_
+#define SAMPLEFILTER_H_
+
+/*
+
+FIR filter designed with
+ http://t-filter.appspot.com
+
+sampling frequency: 800 Hz
+
+* 0 Hz - 50 Hz
+  gain = 1
+  desired ripple = 5 dB
+  actual ripple = 2.914975479357161 dB
+
+* 150 Hz - 400 Hz
+  gain = 0
+  desired attenuation = -40 dB
+  actual attenuation = -43.03832555525106 dB
+
+*/
+
+#define SAMPLEFILTER_TAP_NUM 11
+
+typedef struct {
+  double history[SAMPLEFILTER_TAP_NUM];
+  unsigned int last_index;
+} SampleFilter;
+
+void SampleFilter_init(SampleFilter* f);
+void SampleFilter_put(SampleFilter* f, double input);
+double SampleFilter_get(SampleFilter* f);
+
+#endif
\ No newline at end of file