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change keypad from port d to port c

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I

iedchan

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anyone knows how to change this coding so that i could use port c instead of port d for the keypad interface with pic16f877


Code: 
//#byte port_d = 0x08
char get_key(void)
{
   char t;
      while (1) {
      output_d (input_d() | 0xFF);

       output_bit(PIN_D4,0);
       if (input (PIN_D0) ==0);{
            delay_ms(10);
               return 'A';
      }
      if (input (PIN_D1) ==0){
             delay_ms(10);
                return '7';
      }

      if (input (PIN_D2) ==0){
             delay_ms(10);
                return '4';
      }
      if (input (PIN_D3) ==0){
             delay_ms(10);
                return '1';
      }
      output_d (input_d() | 0xFF);

      output_bit(PIN_D5,0);
       if (input (PIN_D0) ==0);{
            delay_ms(10);
               return '0';
       }
       if (input (PIN_D1) ==0){
             delay_ms(10);
                return '8';
       }
       if (input (PIN_D2) ==0){
             delay_ms(10);
                return '5';
      }
      if (input (PIN_D3) ==0){
             delay_ms(10);
                return '2';
      }
      output_d (input_d() | 0xFF);

      output_bit(PIN_D6,0);
       if (input (PIN_D0) ==0);{
            delay_ms(10);
               return 'B';
       }
       if (input (PIN_D1) ==0){
             delay_ms(10);
                return '9';
       }
       if (input (PIN_D2) ==0){
             delay_ms(10);
                return '6';
       }
       if (input (PIN_D3) ==0){
             delay_ms(10);
                return '3';
       }
       output_d (input_d() | 0xFF);

      output_bit(PIN_D7,0);
       if (input (PIN_D0) ==0);{
            delay_ms(10);
               return 'C';
       }
       if (input (PIN_D1) ==0){
             delay_ms(10);
                return 'D';
       }
       if (input (PIN_D2) ==0){
             delay_ms(10);
                return 'E';
       }
       if (input (PIN_D3) ==0){
             delay_ms(10);
                return 'F';
       }
       else return '<';
      }
}
 

There are some more codes related to this where in u need to make the change.Get the complete program.

Cheers!
 

can you attach the schematic? it should be useful,

and, its CCS so... you should change all PIN_Dx to PIN_Cx, all the output_d to output_c and the same with input_d to input_c...
also... if you are using fast_io(D) somewhere in the code, change it to fast_io(C)....

I think it'll do the job...
 

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