Ries Twisk / Mbed 2 deprecated JoyStick

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Dependencies:   USBDevice mbed-rtos mbed

Fork of JoyStick by Ries Twisk

LowPassFilter.h@5:a0bb17c379ce, 2016-06-22 (annotated)

Committer:
rvt
Date:
Wed Jun 22 12:50:16 2016 +0000
Revision:
5:a0bb17c379ce
Parent:
1:5b2ab44eb31f 
Latest

Who changed what in which revision?

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rvt 0:33bc88c4ab31 1 #ifndef LOWPASSFILTER_H
rvt 0:33bc88c4ab31 2 #define LOWPASSFILTER_H
rvt 0:33bc88c4ab31 3 #include "mbed.h"
rvt 0:33bc88c4ab31 4 #include "AnalogFilterInterface.h"
rvt 0:33bc88c4ab31 5
rvt 1:5b2ab44eb31f 6 /**
rvt 1:5b2ab44eb31f 7 * A simple First Order Low Pass filter for analog input's
rvt 1:5b2ab44eb31f 8 * This is a IIR filter based on http://en.wikipedia.org/wiki/Iir_filter
rvt 1:5b2ab44eb31f 9 */
rvt 0:33bc88c4ab31 10 class LowPassFilter : public AnalogFilterInterface {
rvt 0:33bc88c4ab31 11 private:
rvt 0:33bc88c4ab31 12 double _alpha;
rvt 0:33bc88c4ab31 13 double smoothedValue;
rvt 0:33bc88c4ab31 14 public:
rvt 1:5b2ab44eb31f 15 /*
rvt 1:5b2ab44eb31f 16 chain : a interface to AnalogFilterInterface in case you want to chain several filters
rvt 1:5b2ab44eb31f 17 alpha : Filter coefficient. The lower the value of alpha, the less filtering is done
rvt 1:5b2ab44eb31f 18 */
rvt 0:33bc88c4ab31 19 LowPassFilter(AnalogFilterInterface *chain, double alpha);
rvt 0:33bc88c4ab31 20 ~LowPassFilter();
rvt 0:33bc88c4ab31 21 virtual void setData(long data);
rvt 5:a0bb17c379ce 22 virtual long getData() const;
rvt 0:33bc88c4ab31 23 };
rvt 0:33bc88c4ab31 24
rvt 0:33bc88c4ab31 25 #endif