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51 匯編編程：8255 驅(qū)動(dòng)矩陣鍵盤和數(shù)碼管

匯編編程：矩陣鍵盤控制數(shù)碼管切換顯示0~F。下面是電路圖。要求16個(gè)鍵按下能顯示0~F字樣?？吹竭@樣的電路和程序，不由得想起初學(xué)單片機(jī)時(shí)情景。十幾年前，是一本北航的書，里面就是這樣的程序。后來又看過幾

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2018-10-15

8255 數(shù)碼管匯編編程驅(qū)動(dòng)矩陣