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digital inputs pic16f877a

 
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PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Mar 04, 2009 2:47 pm     Reply with quote
I suggest that you start with a simple program that doesn't use the RTOS.
Make that program work first. Here's an example:
Code:
#include <16F877A.h>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=4000000)
#use rs232(baud=2400,xmit=PIN_E0,rcv=PIN_E1)

//===================================
void main()
{

while(1)
  {
   if(input(PIN_C0))    // Read the switch pin.
      putc('1');        // Display the state of the pin.           
   else
      putc('0');

   delay_ms(100);
  }

}

Make sure that pin C0 has a pull-up resistor on it. You can use 4.7K or
10K.
Sydney



Joined: 13 Feb 2009
Posts: 71

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PostPosted: Wed Mar 04, 2009 3:22 pm     Reply with quote
Agree with PCM, and you seem to be overlooking the fact that input(PIN_C0); is only ever going to return 0 or 1, what sensor is it?
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