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- Update:
- 2012-11-26
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- cheng0t
Description: Design software in a single pulse button, a positive pulse to make 8255 to generate an interrupt request to allow the CPU to an interrupt service: Read toggle switch state, set the 3 state, each state of the screen to display different information, such as a status screen display " DOING ONE" , " 2" " TWO," 8 " display" EXIT "
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单脉冲按钮8255.txt
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