Problem With PIC16F886 Port Read[URGENT]

[Naren Rover]

Hi Guys.I need help with this Program I'm using PIC16f886 controller
when I press a push Button a LED should blink , the program works fine
the button is connected to pin RB3 and LED to pin RA2.
Problem arises when i set Analog pin
when i enable analog pin AN11 which is in RB4, RB3 is not sensing Button Press.
i have attached the program can someone help me.. thank you

#include <xc.h>
#define BUTTON RB3
#define LED RA2
void main(void)
{
PORTA=0x00;
PORTB=0x00;
TRISA=0x00;
TRISB=0x18; //setting RB4(AN11),RB3 as inputs
ANSEL=0X00;
ANSELH=0X08; // enabling Analog pin AN11 pin
// ANSELH=0X00;
// RB3 senses button when analog pin is disabled which is in RB4
while(1)
{
if(BUTTON==0)
{
LED=1;
}
else
{
LED=0;
}
}

}

 

[Ian Rogers]

Can you sketch your circuit... Have you a pullup resistor on RB3?

Is this simulation only?

 

[Naren Rover]

yes i used a pull up.. i have attached schematic please see it

 

[Pommie]

Can't see anything that's wrong. Is this a simulation?

Mike.

 

[Naren Rover]

yes I"m simulating in PROTEUS, its not working in PROTEUS

 

[Pommie]

Can't help as I don't do Proteus. Hopefully Ian can help you.

Mike.

 

[Ian Rogers]

Okay!!! I think this is a "Protues" issue... ANSELH bit 4 is selecting RB3 instead of RB4..

I have posted a note on Labcenter, Ettore will answer soon... As a quick fix use ANSELH = 0x10; as they seem to match the port bit by mistake.

 

[Naren Rover]

Thanks Ian . I got the Correct output , I did in actual Hardware and it was working fine . the problem was with PROTEUS

 

[Ian Rogers]

Thanks Ian . I got the Correct output , I did in actual Hardware and it was working fine . the problem was with PROTEUS

Yes! I used MPLAB sim and its working fine in that!

 

[Ian Rogers]

Just heard back!! There will be a bug fix in the next release.... So Proteus is the guilty party!

 

[Naren Rover]

Thank you for your update!!! you guys have been really helpful