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Reading two switches at a time from pic16f877a

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By using a digital input, no way.

By using an analog input, you can do that with an unbalanced resistive net.
This way:

Code: 
    Vcc
      |
      |
      |
     ---
    |   |
    |   |R1
    |   |
     ---	
      |
      |-------- Analog Input
      |
  ---------
  |       |
 ---     ---
|   |   |   |
|   |R2 |   |R3
|   |   |   |
 ---     ---
  |       |
  |       |
  |       |
   \ Sw1    |- Button
  |       |
  |       |
  |       |
-----   -----
 ---     ---
  -       -

I'm assuming that you want to read both at the same pin.
 
If they are connected to the same port, read the port (rather than the 2 bits)
 
You can also use this if two pins are used.

Code: 
TRISB1 = 1;
TRISB2 = 1;
if( (RB1>0) && (RB2>0) ) {
//do something
}

Reed switch is also a normal switch with digital output open or close, but operated with help of magnet, you can also use Interrupts if required,
 
Hi,
You can enable the interrupts for the both the pins, when ever change occurred it automatically capture that information.

If that pins are connected to the single port, you can read that port & could perform some bit wise operation to get the result.
 

Thanks boy. But i have to sense it on separate pins
but thanks alot

- - - Updated - - -

chandu.kurapati said:
Hi,
You can enable the interrupts for the both the pins, when ever change occurred it automatically capture that information.

If that pins are connected to the single port, you can read that port & could perform some bit wise operation to get the result.
Click to expand...

thank you very much
 

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