crc16_checksum.h

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// Copyright 2024-2025 The Aerospace Corporation.
// This file is a part of SatCat5, licensed under CERN-OHL-W v2 or later.
 
#pragma once
 
#include <satcat5/io_checksum.h>
 
namespace satcat5 {
    namespace crc16 {
        u16 kermit(unsigned nbytes, const void* data);
        u16 xmodem(unsigned nbytes, const void* data);
 
        class KermitTx : public satcat5::io::ChecksumTx<u16,2> {
        public:
            explicit KermitTx(satcat5::io::Writeable* dst, u16 init = 0, u16 xorout = 0);
            bool write_finalize() override;
        private:
            void write_next(u8 data) override;
            const u16 m_xorout;
        };
 
        class KermitRx : public satcat5::io::ChecksumRx<u16,2> {
        public:
            explicit KermitRx(satcat5::io::Writeable* dst, u16 init = 0, u16 xorout = 0);
            bool write_finalize() override;
        private:
            void write_next(u8 data) override;
            const u16 m_xorout;
        };
 
        class XmodemTx : public satcat5::io::ChecksumTx<u16,2> {
        public:
            explicit XmodemTx(satcat5::io::Writeable* dst, u16 init = 0, u16 xorout = 0);
            bool write_finalize() override;
        private:
            void write_next(u8 data) override;
            const u16 m_xorout;
        };
 
        class XmodemRx : public satcat5::io::ChecksumRx<u16,2> {
        public:
            explicit XmodemRx(satcat5::io::Writeable* dst, u16 init = 0, u16 xorout = 0);
            bool write_finalize() override;
        private:
            void write_next(u8 data) override;
            const u16 m_xorout;
       };
    }
}