how to implement debounce using Timer0

[CMatic]

I have searched this topic in the forum but did not find a reasonable thread.
I implemented Interrupt-on-change #INT_RA routine on PIC16F688 and detect changes on three tac switches. The routine works, I am able to distinguish which switch was pressed.

The problem is one Tact switch I am setting a flag but it keeps getting reset.
So, the flag is to determine if the Temp is Deg C or Deg F. And as the switch is pressed I toggle the flag. But it seems its getting toggled once when I push and another time when I lift my finger from the tac switch.

Can you please give me some thoughts on how to implement this?
Thank you all.

[PCM programmer]

See this thread on the Button command and a link to a Timer interrupt version:
http://www.ccsinfo.com/forum/viewtopic.php?t=23837

[PCM programmer]

Also, this thread has tips on how to distinguish between pressing and
releasing a switch, when using #int_ra or #int_rb interrupts:
http://www.ccsinfo.com/forum/viewtopic.php?t=51383

[CMatic]

PCM Programmer Thanks, but as I mentioned I am already using #INT_RA (interrupt on change) to detect changes to Port A so looping in While will not work. Is there a thread where timer is used for debouncing the switch?

[Mike Walne]

I don't use the int on change timers.

I simply use any one of the built-in timers to generate a (say) 1ms tick.
On each tick, poll the switches, use that to decide on switch state and implement debounce.

Mike

[CMatic]

PCM Programmer once more you amazed me, thanks so much.
Mike Walne, I will try your method once I am done with this approach, thanks so much for the suggestion.

[PCM programmer]

The button command (interrupt version) polls the switches in the timer
interrupt at at 10ms interval. This inherently debounces the switches.