Serial_unpacker.h

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#ifndef SERIAL_UNPACKER_H
#define SERIAL_UNPACKER_H
 
#include <Arduino.h>
#include <HardwareSerial.h>

class Serial_unpacker {
    private:
        HardwareSerial &uart;

        const uint8_t start_byte;

        enum state_t {
            idle,

            start_byte_received,

            len_byte_received,

            data_bytes_rx_done
        };

        state_t status;

        uint8_t *buf_arr;

        uint8_t buf_arr_idx;

        uint8_t buf_arr_len;

        uint8_t my_xor_byte;

        void allocate_buffer (const uint8_t len);

        void free_buffer ();

        void put_byte_to_buffer (const uint8_t data);

        bool is_start_byte_received ();
    
    public:
        Serial_unpacker (HardwareSerial &init_uart, const uint8_t init_start_byte);

        ~Serial_unpacker ();

        bool update ();

        const uint8_t *get_packet_ptr ();

        uint8_t get_packet_len ();

        HardwareSerial &get_uart ();
};
 
 
#endif // #ifndef SERIAL_UNPACKER_H