Why doesn't count more than 255 ??

[jruibarroso]

I'm working with a 16F877 , made a counter but it don't pass over (seconds) >255 countings, it step to 0..1..2..3..4..255..0..1. Any body can help me with this ?? Thank you ALL

int seconds;

#int_rtcc
clock_isr() {
output_high(LED);
if(--int_count==0)
{
output_low(LED);
++seconds;
int_count=INTS_PER_SECOND;
}

[Ttelmah]

Look at what sizes variables can hold.
An _integer_, by default, is an 'int8', and can only hold 0....255.

Best Wishes

[jruibarroso]

ok, thank you very much

but there is another problem...

i changed int seconds; to int16 seconds;

but returns an erros on this line

printf(lcd_putc,"\f %U TEMPERATURA %2U\n", seconds , temp);

do you know why ?

[newguy]

Since 'seconds' is now a long integer (int16), you must use '%lu' not '%u' in your printf statement.

I recommend that you take some time to peruse the manual and/or online help.

[Humberto]

[jruibarroso]

THANK you !!