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- 2012-11-26
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Description: Key interrupt handler
Since the system contains few buttons, using the frequency is not high, the system uses interrupt scanning mode,
When a key is pressed when the corresponding interrupt will be the first to enter, and then perform a scan to determine which button is pressed
Master s degree thesis, Wuhan University of Technology
, Ie only when a key is pressed when the scanning process, so you can improve CPU efficiency, to avoid air
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