i use pic16f77 i/p, but repeat reset...

[ryuinseung]

my source is

#fuses WDT
#include <16f77.h>
#byte d=8
#use delay(clock=4000000)

main() {
char led;
set_tris_d(0);
led=1;
delay_ms(30);
while(1) {
do{
d=led;
led <<= 1;
if(led==0) led = 1;
}
while(1);
}
}

just led on_off..
why repeat reset?
i don't know. let me know please..
i'm sorry. i'm not good speaking english.
have a good day..

[Paolino]

Your code uses the WatchDog. It is resetting the PIC. So, insert setup_wdt(WDT_2304MS) and restart_wdt(). Try now.

#fuses WDT
#include <16f77.h>
#byte d=8
#use delay(clock=4000000)

main() {
char led;
set_tris_d(0);

setup_wdt(WDT_2304MS);

led=1;
delay_ms(30);
while(1) {
do{
restart_wdt();
d=led;
led <<= 1;
if(led==0) led = 1;
}
while(1);
}
}


Optimize the code: it is not necessary insert a while-do cycle into a while(1) cycle...

Regards.

Paolo.

[ryuinseung]

and the pic-programer wdt-disable(option).