peek()

描述

从序列埠收到并放在缓冲区的资料中,取得下次呼叫 read() 会得到的值。使用这个函式并不会减少缓冲区的资料总数,换句话说,透过 peek() 成功取得值后,下次用 read() 也会得到相同的值。

peek() 是继承于 Stream 类别。

语法

适用所有板子:

Serial.peek()
Serial1.peek()

适用 86Duino ONE:

Serial2.peek()
Serial3.peek()
Serial485.peek()

适用 86Duino EduCake:

Serial2.peek()
Serial3.peek()
Serial232.peek()

参数

回传

在缓冲区内第一个可用的 byte (假如缓冲区内没有值,则回传 -1) int 型别

See also

Serial
available()
begin()
end()
find()
findUntil()
flush()
parseFloat()
parseInt()
print()
println()
read()
readBytes()
readBytesUntil()
setTimeout()
write()
serialEvent()


语法参考主页面

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.