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Inerrupt for begin if any key press

 
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carlosma



Joined: 24 Mar 2004
Posts: 53
Location: Portugal

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Inerrupt for begin if any key press
PostPosted: Wed Apr 07, 2004 5:42 am     Reply with quote
Hello

I do a program to read IO and save in the Eeprom the value and this program need a 4 digit code to acces. I can change the code press *
Use LCD. C and Keyboard 4x4.

I need help to configure Inteerupt IF no key press in 5 seconds return to Begin, like a normal access code.

Thank you
Carlos

Code:


#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#USE RS232 (baud = 9600, xmit = PIN_C6, rcv = PIN_C7 )

#include <lcd.c>
#include <kbd.c>

#rom 0x2100={1,2,3,4}   


////.....////

void grava()
   {
   int ncod =0;
   
   printf("programacao %c\r\n",k);
   lcd_putc("\fNovo Codigo\n");
   for (ncod = 0; (ncod < nmax);)
      {
      k=kbd_getc();
      if(k!=0)
         {
         lcd_putc("*");
         ncod++;
         write_eeprom ((ncod - 1),(k - 0x30));
         }
      }
      
   printf("Codigo gravado %c\r\n",k);
   lcd_putc("\fCodigo gravado\n");
   }

/// .... ///

void main()
{

// .. //

   while (TRUE)
         {
         k=kbd_getc();
         if(k!=0)
        if(k=='*')
           grava();
          //lcd_putc('\f');
        else
           {   
                lcd_putc("*");
                 EE=read_eeprom(Ponta);
                rel = EE + 0x30;
                printf( "%2x ", k );
                printf( "%2x ", rel );
                n++;
                Ponta++;
                if ( (rel==k) && (correcto==(Ponta -1) ))   
                  {
                  correcto++;
                      if ( n == nmax )
                     {
                     output_high(pin_b0);
                     printf("ligado %c\r\n",k);
                     lcd_putc("\fCodigo Correcto\n");
/// .... //   
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Apr 07, 2004 12:03 pm     Reply with quote
Quote:
I need help to configure Inteerupt IF no key press in 5 seconds return to Begin, like a normal access code.

So you need the code to timeout if there is no keypress after
a specified time. Look at my answer in this thread below.
Also look at the link at the end of the thread.
http://www.ccsinfo.com/forum/viewtopic.php?t=18034
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