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Using input() with a variable

 
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knobby67
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Using input() with a variable
PostPosted: Thu Sep 28, 2006 9:41 am     Reply with quote
Hello I’m hoping someone can help me out with this, basically I have a structure define as below

Code:

struct meter_input 
{
   byte input;
   long count;
   char status;
};


I then have structure like the below

Code:

STRUCT meter_input _10pCoinInput=
{
   PIN_B0,
   0,
   LO,   

};


Where input is used to store the pin to be read with the library function input()

I call the function

ReadStatus(&_10pCoinInput);

The ReadStatus is as follows
Code:

void ReadStatus(struct meter_input *meter)
{



   if(meter->status==HIGH)         //is the status high
   {                        
      if(!input(meter->input))      //has the input dropped low
      {
         meter->status=LO;
         meter->count++;
      }
      else
      {
         return;
      }
   }
   else………………………

However this gives a error
Expression must evaluate to a constant

As far as I’m awear it does? Input is PIN_B0, I’ve tried defining input with a const ie const byte input; but this gives an error can anyone advise?
Thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Sep 28, 2006 10:06 am     Reply with quote
This thread has links to the routines:
http://www.ccsinfo.com/forum/viewtopic.php?t=27923&highlight=18f+16f
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