This library reads Wiegand, saving it into a buffer, calling a callback function after it is full or a timeout is reached.
Dependents: mbed-os-wiegand-example
This library reads Wiegand, saving it into a buffer, calling a callback function after it is full or a timeout is reached. Data can be extracted as :
- Raw
- Base 10 Integer
- Base 10 String
- Base 16 String
Always call reset after saving Wiegand data.
It automatically calibrates the timeout during the first reading unless specified.
Timeout can be set using setTimout, units are in milliseconds (first call stopCalibrating()).
EventQueue is required for deferring from ISR, it is possible to dispatch the EventQueue from the mainQueue or any other thread.
Diff: wiegand.h
- Revision:
- 0:4929608f96d0
- Child:
- 1:5217baef72fd
diff -r 000000000000 -r 4929608f96d0 wiegand.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/wiegand.h Sat Apr 27 23:37:01 2019 +0000 @@ -0,0 +1,65 @@ +#ifndef MBED_MICIO_H +#define MBED_MICIO_H + +#include "mbed.h" + +/* + This library reads Wiegand saving it into a buffer, calling a callback function after it is full or a timeout is reached. + It automatically calibrates the timeout during the first reading unless specified. + Timeout can be set using setTimout, units are in milliseconds (first call stopCalibrating()). + Always call reset after saving Wiegand data. + Data can be extracted as : + * Raw -- For manipulation + * Base 10 Integer + * Base 10 String + * Base 16 String + EventQueue is required for deferring from ISR, it is possible to dispatch the EventQueue from the mainQueue or any other thread. +*/ + +class Wiegand { +private: + Callback<void(void)> _callback; + InterruptIn _d0; + InterruptIn _d1; + EventQueue* _eventQueue; + Timer _interPulseGapTimer; + Timeout _timeout; + + bool _autoCalibration; + unsigned char _bits; + volatile unsigned char _bitsRead; + uint8_t* _buffer; + unsigned char _bufferSize; + unsigned char _decDigits; + bool _firstReading; + unsigned char _hexDigits; + volatile int* _interPulseGapBuffer; + unsigned int _transmissionTimeout; + + void _data0ISR(void); + void _data0ISRRise(void); + void _data1ISR(void); + void _data1ISRRise(void); + void _onWiegandISR(void); + void _onWiegandNonISR(void); + void _shift_left(volatile unsigned char *ar, int size, int shift); + +public: + Wiegand(PinName d0, PinName d1, EventQueue* eventQueue, Callback<void(void)> wiegandCallback, unsigned char bits); + ~Wiegand(); + + void calibrateTimeout(void); + unsigned char getDecDigits(); + void getDecString(volatile char* decString); + unsigned char getHexDigits(); + void getHexString(volatile char* hexString); + uint8_t* getRaw(void); + long double getRawInt(void); + unsigned int getTimeout(void); + void reset(void); + void setTimeout(unsigned int time); + void startCalibrating(void); + void stopCalibrating(void); +}; + +#endif \ No newline at end of file