switch depress from danni debounce code

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firmware
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Posted by firmware: Sat. Dec 13, 2008 - 08:01 AM
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Hi all,

I'm trying to do a switch depress routine from danni debounce code, in my understanding I may need to keeping the prvious fixed debounce data, then compare with the currently fixed data and finally judge whether there is any change ? Could some one help me to guide ? My understanding correct or not ?

Regards,

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AVR Microcontrollers, megaAVR and tinyAVR
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JohanEkdahl
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Posted by JohanEkdahl: Sat. Dec 13, 2008 - 10:01 AM
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If you need this in order to do auto-repeating keys then one variant of Danni's code already has this. Look here: https://www.avrfreaks.net/index.p...

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firmware
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Posted by firmware: Sat. Dec 13, 2008 - 10:11 AM
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JohanEkdahl

Thank you for your help, in my understanding that for a repeat routine ? I'm looking for a depress routine.

Regards,

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danni
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Posted by danni: Sat. Dec 13, 2008 - 10:22 AM
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firmware wrote:
I'm trying to do a switch depress routine from danni debounce code

If you meant the release event, define a further variable key_release and insert: 

...
key_press |= key_state & i;      // 0->1: key press detect
key_release |= ~key_state & i;      // 1->0: key release detect
...

But I can never think any practical usage of it, since any human expect reaction on pressing the key.

Peter

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firmware
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Posted by firmware: Sat. Dec 13, 2008 - 10:46 AM
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Peter

Thank you for your clever debounce routine.

Quote:
But I can never think any practical usage of it, since any human expect reaction on pressing the key.
It just my wonder.

Regards,

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