Important changes to forums and questions
All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.
expression must have class type
Topic last updated 29 Sep 2011, by 
Krishna Kaushal Panduru.
1 reply
Krishna Kaushal Panduru.
1 reply
Please somebody can tell me what's wrong in this code.
Sorry guys, when I pressed te post button and review the code, I found the problem myself. I used . not ->
the line _phaseZ.fall(this, &PolledQEI::countRev); makes the problem
phaseZ is declared in the protected section of PolledQEI class like that:
InterruptIn *_phaseZ;
void PolledQEI::init(PinName a, PinName b, PinName z){
_phaseA = new DigitalIn( a );
_phaseA->mode( PullUp );
_phaseB = new DigitalIn( b );
_phaseB->mode( PullUp );
_phaseZ = new InterruptIn( z );
_phaseZ->mode( PullUp );
_phaseZ.fall(this, &PolledQEI::countRev);
_actEncPos = 0;
_dir = 0;
_ticker = new Ticker;
}