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pic16f877 setup_adc_ports(all_digital); HELP

 
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psypersky



Joined: 06 Jul 2008
Posts: 13

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pic16f877 setup_adc_ports(all_digital); HELP
PostPosted: Sun Jul 06, 2008 2:36 am     Reply with quote
I have this program and everything works, except the digital inputs on port a, it always read the same, no matter the state of the pin :S

i tried everything to make in work but i cant, can some one help me with this please?

The unworking peace of code it's almost at the bottom....

The compiler make an error .. (Undefined identifier ALL_DIGITAL)...

[sorry for my realy bad english :oops: ]

Code:
#include <16F877a.h>


#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)  // Jumpers: 8 to 11, 7 to 12
#include <flex_lcd.c>
#include <x10.c>
#include <input.c>
#include <STDLIB.H>



//#define Digital_in_0                 PIN_A0


//#use standard_io(A)



void main()
{



  int32 prueba=0;
   int nose =0;
    char house_code;
   BYTE key_code;
   
  setup_adc_ports(all_digital);
 setup_comparator(NC_NC_NC_NC);


   
   output_bit( PIN_B4, nose);
      output_bit( PIN_E0, nose);
   
 
   lcd_init();
 

lcd_putc("\fHello World\n");

 lcd_putc("\f" );


 printf("Ruben`s module 16f877 online\n\r");

       while (TRUE) {
   
   prueba++;
   if(prueba==20000){//papadeo de B4
     if(nose==0)
     nose=1;
     else
     nose=0;
     
     output_bit( PIN_B4, nose);
      output_bit( PIN_E0, nose);
       
     prueba=0;
       }
       
       
        if(kbhit()) {     
        house_code = getc();
               printf("%c", house_code);
        if((house_code>='A') && (house_code<='P')) {
       
          key_code=gethex();
         
         //  printf("%c%2X", house_code, key_code);
           printf("Mandando>>\n\r");
           
          x10_write(house_code,key_code);
          //x10_write(house_code,key_code);
         printf("%c%2X", house_code, key_code);
         
        }
       
       
       printf("Fin de kbhit\n\r");
      }

      if(x10_data_ready()) {
        putc('>');
        x10_read(&house_code, &key_code);
        printf("%c%2X", house_code, key_code);
       
         if(house_code == 'A')
         printf("house code = A");
        if(key_code== 0x1B)
         printf("key code = 1b");
      }
     
   
   
     if(!input(PIN_A4))   // This is the part than doesn`t work !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     {
         x10_write('B',0x01);
         lcd_putc("\fPin A0 precionado\n");
          delay_us(50);
          }

   
   
   
   
     
   }
       
       
       }


Last edited by psypersky on Sun Jul 06, 2008 11:03 am; edited 1 time in total
Ttelmah
Guest
PostPosted: Sun Jul 06, 2008 2:58 am     Reply with quote
First, the line 'setup_adc_ports(ALL_DIGITAL)', neds to be _in_ the program. This is 'code', not a 'configuration' (like a #define, or fuse statement), and needs to actually be _run_. Put it into your main, immediately after your variable declarations. Currently it is not being called.
Second, on the 'A' chip, there are _two_ analog devices, that use the pins. The ADC,and the comparator. _Both_ should be disabled. So as the next line after the setup_adc_ports, you want:

setup_comparator(NC_NC_NC_NC);

which turns off the comparator connections.
With these done, the pins become available for digital use.
Anything in the manual, which in it's 'example', has a ';' at the end of the line, is code, and needs to be inside a routine where it is called, to actually work.

Best Wishes
psypersky



Joined: 06 Jul 2008
Posts: 13

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(undefined identifier ALL_DIGITAL)
PostPosted: Sun Jul 06, 2008 11:01 am     Reply with quote
Ttelmah wrote:
First, the line 'setup_adc_ports(ALL_DIGITAL)', neds to be _in_ the program. This is 'code', not a 'configuration' (like a #define, or fuse statement), and needs to actually be _run_. Put it into your main, immediately after your variable declarations.


Thanks Ttelmah.... I put setup_adc_ports(all_digital); after my variable declarations, but now it says (undefined identifier ALL_DIGITAL), ...
drh



Joined: 12 Jul 2004
Posts: 192
Location: Hemet, California USA

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PostPosted: Sun Jul 06, 2008 11:21 am     Reply with quote
Quote:
'setup_adc_ports(ALL_DIGITAL)'


Change ALL_DIGITAL to NO_ANALOGS
_________________
David
psypersky



Joined: 06 Jul 2008
Posts: 13

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PostPosted: Sun Jul 06, 2008 11:52 am     Reply with quote
drh wrote:
Quote:
'setup_adc_ports(ALL_DIGITAL)'


Change ALL_DIGITAL to NO_ANALOGS


It works now, thanks!! :grin:
Ttelmah
Guest
PostPosted: Sun Jul 06, 2008 2:45 pm     Reply with quote
The text inside these statements, is contained in the .h file for the processor, as a series of 'defines'. Unfortunately, not quite 'standard' (CCS has changed the form used at various times over the years), so when wanting to know what to put into the statements, look in the file for your processor. Smile

Best Wishes
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