MC9S08MP16 KBI problem

Maximus_KR — Sun, 01 Jul 2012 18:35:20 GMT

Hello.

Nowadays, i have some problem in Keyboard Interrupt function of MC9S08MP16.

The Port is PTD4/KBI3P4/PDB2OUT that is connected Hall effect sensor(open collector type).

also the Hall effect sensor input is connected to FTMCH1(to use as input capture function).

the problem is.

- Port value is changed in debug mode well.

- but, there's no KBI event.

( I already checked KBI Function by using push button switch so many times.

I confirm, KBI initialize and setup are no problem..)

- input capture interrupt is running well.

I wonder, Input capture interrupt well,,,,, but KBI no event?

I hope your advice..

Have a nice day~

Re: MC9S08MP16 KBI problem

sandeepnaik — Tue, 10 Jul 2012 12:20:47 GMT

Have to checked for the polarity for interrupt event though this should not be a problem?

Have you acitivated pull-up resistor for that particular pin provided you are not using external pull up?