kopia lustrzana https://github.com/jgromes/RadioLib
69 wiersze
1.4 KiB
C++
69 wiersze
1.4 KiB
C++
#if !defined(_RADIOLIB_CRC_H)
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#define _RADIOLIB_CRC_H
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#include "../TypeDef.h"
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#include "../Module.h"
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#if defined(RADIOLIB_BUILD_ARDUINO)
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#include "../ArduinoHal.h"
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#endif
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// CCITT CRC properties (used by AX.25)
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#define RADIOLIB_CRC_CCITT_POLY (0x1021)
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#define RADIOLIB_CRC_CCITT_INIT (0xFFFF)
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#define RADIOLIB_CRC_CCITT_OUT (0xFFFF)
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/*!
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\class RadioLibCRC
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\brief Class to calculate CRCs of varying formats.
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*/
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class RadioLibCRC {
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public:
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/*!
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\brief CRC size in bits.
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*/
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uint8_t size = 8;
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/*!
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\brief CRC polynomial.
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*/
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uint32_t poly = 0;
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/*!
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\brief Initial value.
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*/
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uint32_t init = 0;
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/*!
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\brief Final XOR value.
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*/
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uint32_t out = 0;
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/*!
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\brief Whether to reflect input bytes.
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*/
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bool refIn = false;
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/*!
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\brief Whether to reflect the result.
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*/
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bool refOut = false;
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/*!
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\brief Default constructor.
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*/
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RadioLibCRC();
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/*!
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\brief Calculate checksum of a buffer.
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\param buff Buffer to calculate the checksum over.
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\param len Size of the buffer in bytes.
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\returns The resulting checksum.
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*/
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uint32_t checksum(const uint8_t* buff, size_t len);
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};
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// the global singleton
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extern RadioLibCRC RadioLibCRCInstance;
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#endif
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