IC697BEM711
IC697BEM711
數字I/O的應用
在大多數的單片機實驗中,跑馬燈實驗正是數字I/O的典型應用,也是跑馬燈的實驗被安排個的原因。通過將單片機的I/O引腳位進行置位或清零來點亮或關閉LED燈,雖然簡單,但是這就是數字電路中的邏輯功能。數學I/O應用的實驗還有按鍵實驗,當按下某鍵時,某LED燈被點亮。數字I/O實驗教會我們單片機的編程思想,必須首先對單片機的相應寄存器進行配置,以初始化I/O引腳,這樣才能使該引腳具備數字輸入與輸出功能。 單片機的一個內置或外置功能的使用,就是對該功能相關的寄存器進行設置,初始化,而這便是單片機編程的特點。少則4、5個函數搞定,多則十幾行程序,要有耐心,別怕麻煩,所有的單片機都是這樣。
IC697BEM711
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