We also saw in the task node example that nodes can represent wait states. 我們在任務節點的例子中看到了節點可以表示等待狀態。
A method of interfacing with hardware that involves repeatedly reading a status register until the device has reached the awaited state. 一種硬體交互方法,不斷讀狀態寄存器,直到設備進入等待狀態。