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#ifndef CRC32_H
#define CRC32_H
#include <RepRapFirmware.h>
#if SAME5x
# define USE_SAME5x_HARDWARE_CRC 1
#else
# define USE_SAME5x_HARDWARE_CRC 0
#endif
// Note: when USE_SAME5x_HARDWARE_CRC is true, the Update methods must not be called from an ISR!
class CRC32
{
private:
uint32_t crc;
public:
CRC32() noexcept;
void Update(char c) noexcept;
void Update(const char *s, size_t len) noexcept
__attribute__((optimize("no-unroll-loops"))); // we already optimised the loops, and on the SAME5x unrolling them could make us feed data to the CRC unit too fast
void Reset(uint32_t initialValue = 0xFFFFFFFF) noexcept;
uint32_t Get() const noexcept;
};
inline uint32_t CRC32::Get() const noexcept
{
return ~crc;
}
inline void CRC32::Reset(uint32_t initialValue) noexcept
{
crc = initialValue;
}
#endif
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