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- SCM
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- Update:
- 2012-11-26
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Description: This is the subroutine to read the keyboard
The main contents are: how to define, and how to get keys, and the methods to prevent interference with the keyboard
As well as how to deal with the key read
Ideas: First of all, the output of a pin in a certain level, and then read the pin level, if the opposite
Then the keys may have occurred, but does not rule out the interference, in order to prevent interference, the need for software 20ms delay
The elimination of interference, and then wait for the release of the user, otherwise, may be repeated to a certain result, the occurrence of unforeseen circumstances
It should be said that the external keyboard input is a single chip an important way to enter commands, so how to design the keyboard and the keyboard work of the principle of the method of reading the keyboard, the keyboard design of the anti-jamming power in a single machine system design plays an important role. This example hardware in the system based on the query d
To Search:
- [7] - Single-chip source, time to achieve key
- [vhdl] - VHDL 的一个流水灯程序 开发平台Quartusii 使用的延时方法为分频思想
- [keyboardcontroller] - Keyboard controller entity -- -- The con
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duqujianpan.txt
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