peek()
描述
從序列埠收到並放在緩衝區的資料中,取得下次呼叫 read()
會得到的值。使用這個函式並不會減少緩衝區的資料總數,換句話說,透過 peek()
成功取得值後,下次用 read()
也會得到相同的值。
peek()
是繼承於 Stream 類別。
語法
適用所有板子:
Serial.peek()
Serial1.peek()
適用 86Duino ONE:
Serial2.peek()
Serial3.peek()
Serial485.peek()
適用 86Duino EduCake:
Serial2.peek()
Serial3.peek()
Serial232.peek()
參數
無
回傳
緩衝區內第一個可用的 byte (假如緩衝區內沒有值,則回傳 -1) – int 型別
See also
- Serial
- available()
- begin()
- end()
- find()
- findUntil()
- flush()
- parseFloat()
- parseInt()
- print()
- println()
- read()
- readBytes()
- readBytesUntil()
- setTimeout()
- write()
- serialEvent()
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.