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73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
// Entropy - A entropy (random number) generator for the Arduino
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//
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// Copyright 2014 by Walter Anderson
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//
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// This file is part of Entropy, an Arduino library.
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// Entropy is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Entropy is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Entropy. If not, see <http://www.gnu.org/licenses/>.
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#ifndef Entropy_h
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#define Entropy_h
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#include <stdint.h>
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// Separate the ARM Due headers we use
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#ifdef ARDUINO_SAM_DUE
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#include <sam.h>
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#include <sam3xa/include/component/component_trng.h>
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#endif
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// Teensy required headers
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#ifdef TEENSYDUINO
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#include <util/atomic.h>
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#endif
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// Separate AVR headers from ARM headers
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#ifdef __AVR__
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#include <avr/interrupt.h>
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#include <avr/wdt.h>
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#include <util/atomic.h>
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#endif
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const uint32_t WDT_RETURN_BYTE=256;
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const uint32_t WDT_RETURN_WORD=65536;
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union ENTROPY_LONG_WORD
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{
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uint32_t int32;
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uint16_t int16[2];
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uint8_t int8[4];
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};
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class EntropyClass
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{
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public:
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void initialize(void);
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uint32_t random(void);
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uint32_t random(uint32_t max);
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uint32_t random(uint32_t min, uint32_t max);
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uint8_t randomByte(void);
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uint16_t randomWord(void);
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float randomf(void);
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float randomf(float max);
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float randomf(float min, float max);
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float rnorm(float mean, float stdDev);
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uint8_t available(void);
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private:
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ENTROPY_LONG_WORD share_entropy;
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uint32_t retVal;
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uint8_t random8(void);
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uint16_t random16(void);
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};
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extern EntropyClass Entropy;
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#endif
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