Timer problem

deniska_gus · Joined: 11 Jul 2006 Posts: 42 Location: Minden, Germany

Hello dear frends!

I have one problem. I have to program this situation, but i have no idea how i can realize it. It should work so:

If i push a button AND i hold it pushed for 5 sec. a LED should start lighting.

Any suggestions?

Thank you. Dennis

inservi · Joined: 13 May 2007 Posts: 128

Hello,

I think that a good way is to use an interrupt for counting the time.

For example, set one timer for about 0.76 second and use a int16 counter in the interrupt. when the counter count at least 380 the the 5 second are past
You can check if the button is pushed in he interrupt. If the button is not pushed then set the counter to 0.
In the main loop you can testing if the counter is greater than 380 then set the led on...

deniska_gus · Joined: 11 Jul 2006 Posts: 42 Location: Minden, Germany

Thank you very much. I will test it. I use PIC16F877A