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。
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