| ??? 09/05/04 13:11 Read: times |
#76910 - RE: debouncing for matrix keypad ? Responding to: ???'s previous message |
Dear Ijaz:
Hello, thank ou very much for reply, Ijaz Ahmed wrote: ------------------------------- Bouncing varies from switch to switch, and also varies upon each press and release. that's reasonable but I tried three different types of ordinary microswitches but all of them more or less were near what I was posted. I understand there are some microswiches far worse than this but this is a very ordinary microswitch that I use for keypad. Ijaz Ahmed wrote: ------------------------------- Just look at the oscillogram you had posted. The time is in milli seconds and the microcontroller operates in micro seconds. the point I was trying to make is keypad scanning routines read pins every ,15-30 ms, not microseconds thank you Reza fallahati |
