mirror of
https://github.com/RobTillaart/Arduino.git
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76 lines
1.5 KiB
C++
76 lines
1.5 KiB
C++
#pragma once
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//
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// FILE: DEVRANDOM.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.2
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// PURPOSE: Arduino library for a /dev/random stream - useful for testing
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// URL: https://github.com/RobTillaart/DEVRANDOM
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#include "Arduino.h"
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#define DEVRANDOM_LIB_VERSION (F("0.2.2"))
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#define DEVRANDOM_MODE_RANDOM 0
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#define DEVRANDOM_MODE_DIGITALREAD 1
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#define DEVRANDOM_MODE_ANALOGREAD 2
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#define DEVRANDOM_MODE_MARSAGLIA 3
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class DEVRANDOM : public Stream
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{
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public:
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DEVRANDOM();
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DEVRANDOM(const char * str);
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DEVRANDOM(const uint32_t value);
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DEVRANDOM(const float value);
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int available();
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int peek();
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int read();
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// keep CI happy as parent class flush is virtual.
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void flush();
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// for reseeding, including via print() and println().
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size_t write(const uint8_t data);
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size_t write(const uint8_t * buffer, size_t size);
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// build in random is the default mode.
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void useRandom();
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void useDigitalRead(uint8_t pin);
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void useAnalogRead(uint8_t pin);
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void useMarsaglia();
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uint8_t getMode();
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// OBSOLETE
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// void useAR(uint8_t pin) { useAnalogRead(pin); };
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// void useHW(uint8_t pin) { useDigitalRead(pin); };
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// void useSW() { useRandom(); };
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private:
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uint8_t _next = 0;
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uint32_t _seed = 0;
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uint8_t _mode = 0;
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uint8_t _pin = 0;
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// Marsaglia 'constants'
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uint32_t _m_w = 1;
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uint32_t _m_z = 2;
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int _rnd();
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int _digitalRead();
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int _analogRead();
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uint32_t _marsaglia();
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};
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// -- END OF FILE --
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