Andrew Miller / FrequencyCounter

counts digital frequency based on interrupt and timer, triggers on rising edge

FrequencyCounter.h@0:91a906dbf731, 2016-08-09 (annotated)

Committer:
awmiller
Date:
Tue Aug 09 20:03:10 2016 +0000
Revision:
0:91a906dbf731
first edition;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
awmiller 0:91a906dbf731 1 #ifndef FREQUENCY_COUNTER_H_DECL
awmiller 0:91a906dbf731 2 #define FREQUENCY_COUNTER_H_DECL
awmiller 0:91a906dbf731 3
awmiller 0:91a906dbf731 4 #include <mbed.h>
awmiller 0:91a906dbf731 5
awmiller 0:91a906dbf731 6 class FrequencyCounter {
awmiller 0:91a906dbf731 7 //mbed classes
awmiller 0:91a906dbf731 8 Timer _mtime;
awmiller 0:91a906dbf731 9 InterruptIn _cPin;
awmiller 0:91a906dbf731 10
awmiller 0:91a906dbf731 11 double _lastTime;
awmiller 0:91a906dbf731 12 double _fq;
awmiller 0:91a906dbf731 13 double _iircoef;
awmiller 0:91a906dbf731 14 void _irqs(void);
awmiller 0:91a906dbf731 15
awmiller 0:91a906dbf731 16 public:
awmiller 0:91a906dbf731 17
awmiller 0:91a906dbf731 18 FrequencyCounter(PinName);
awmiller 0:91a906dbf731 19 double getFrequency();
awmiller 0:91a906dbf731 20 double getTime();
awmiller 0:91a906dbf731 21 void setIIRCoeff(double);
awmiller 0:91a906dbf731 22 void start();
awmiller 0:91a906dbf731 23 void stop();
awmiller 0:91a906dbf731 24 };
awmiller 0:91a906dbf731 25 #endif
awmiller 0:91a906dbf731 26