| 1234567891011121314151617181920 | #pragma once#include <stdint.h>#include <stddef.h>namespace MMU2 {/// A minimal serial interface for the MMUclass MMU2Serial {public:    MMU2Serial() = default;    void begin(uint32_t baud);    void close();    int read();    void flush();    void write(const uint8_t *buffer, size_t size);};extern MMU2Serial mmu2Serial;} // namespace MMU2
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