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Enter the correct code to turn led on... problem

 
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aymanoo



Joined: 26 Aug 2011
Posts: 6

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Enter the correct code to turn led on... problem
PostPosted: Mon Sep 26, 2011 1:30 pm     Reply with quote
The objective of my project is to turn led c0 when I enter the correct code so first I'm trying code of one character ("5") on keypad but its not working. Another question what if I have to enter for example the code "123" on keypad to turn the led on ? What do I have change in my code?
Code:

#include<16f887.h>
#fuses HS,NOWDT,NOPROTECT
#use delay(clock=2000000)

#define use_portb_kbd TRUE
#include<lcd.c>
#include<kbd.c>

void main()
{
char k;

lcd_init();
kbd_init();
lcd_putc("\f ready....\n");

while (true)
{
 k=kbd_getc();
 if(k!=0)
    if(k=='*')
       lcd_putc('\f');
    else
       lcd_putc(k);
         
if(k=='5')
  output_high(pin_c0);
else
  output_low(pin_c0);
}
}

_________________
AYMAN
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Sep 26, 2011 3:01 pm     Reply with quote
Quote:
#use delay(clock=2000000)

You have this set for 2 MHz. You probably want 20 MHz.
Hint: it's easier and more reliable to do it this way:
Code:

#use delay(clock=20M)
 


Quote:

What if I have to enter for example the code "123" on keypad to turn the led on ?

Keypad password demo program:
http://www.ccsinfo.com/forum/viewtopic.php?t=45935
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Mon Sep 26, 2011 3:52 pm     Reply with quote
Quote:
The objective of my project is to turn led c0 when I enter the correct code so first I'm trying code of one character ("5") on keypad but its not working.
Just a hint for why your program might not work as expected: your led is blinking so fast that you won't see it. Try adding a delay. Not the perfect solution, but it will do for a simple test:
Code:
if(k=='5')
{
  output_high(pin_c0);
  delay_ms(300);
}
else
  output_low(pin_c0);
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Sep 26, 2011 4:03 pm     Reply with quote
Another option would be to change it so '5' turns the LED on and '4' turns
it off:
Code:

if(k=='5')
  output_high(pin_c0);
if(k=='4')
  output_low(pin_c0);
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