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Hi... I need a C code for Keyboard 5x4 Matrix interfacing with 89C52. I have tried but cant control debouncing. If anyone could help me, I 'll be thank ful.
Another simple idea is to poll the switches at rate whose period is longer than the the bounce time. This way, no past history of the switches need to be maintained. I have done a lot of projects using a 50Hz polling rate.