password check routine , here

[guest]

I made this routine , and im using 4x4 keypad scand with the kbd.c library. It works very well , but the problem .

I need to get out of the loop after 15 secs .

I tried with Wt , but it dosnt wait long enough ,also i tried the Ds1302 , that is used in the circuit (real time clock) , but , it looks like the instruction kbd_getc(); , dosnt like to be executed in a loop with more instructions.....

please give me some hints....
C




//////////////////////////////////////////////////////////////////////
Void passwordcheck(){
Int segundo,timeout,checknum;
char word1,word2,word3,word4,


do {
lcd_putc("\fEnter your pass");
do {
word1=kbd_getc();
} while ((word1<'0') || (word1>'9'));

lcd_putc("\n *");
word1-='0';

do {
word2=kbd_getc();
} while ((word2<'0') || (word2>'9'));

lcd_putc("\n **");
word2-='0';

do {
word3=kbd_getc();
} while ((word3<'0') || (word3>'9'));
lcd_putc("\n ***");
word3-='0';

do {
word4=kbd_getc();
} while ((word4<'0') || (word4>'9'));
lcd_putc("\n ****");
word4-='0';


}

While((word1!=1) || (word2!=1) || (word3!=1) || (word4!=1));

}

[ckielstra]

The function getc() will always wait for a character to arrive on the serial port before execution continues. For a possible solution have a look at the CCS manual, chapter 'How do I get getc() to timeout after a specified time?' (in the November 2005 version this is at page 260).

[guest]

mmm..but im not using the serial port , anyways... im using a keypad....

[ckielstra]

[micro2]

Use interrupt...

#int_TIMER1
TIMER1_isr()
{
if(cTimeOut1 != 0)
cTimeout1 --; //decrementa sino a 0 poi timeout
}

void main
....................
....................
//set Timer1
cTimeout = ?? (the correct value)
...................
...................
if(cTimeout==0)
return //exit function