[SD]
描述
Read a byte from the file without advancing to the next one. That is, successive calls to peek() will return the same value, as will the next call to read().
peek() inherits from the Stream utility class.
語法
file.peek()
參數
file: an instance of the File class (returned by SD.open())
回傳
The next byte (or character), or -1 if none is available.
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函式庫參考主頁面
The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.
