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| Author |
Message |
X!ndY M@riE
Guest
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| millisecond using timer2 |
 Posted: Thu Jan 24, 2008 10:13 pm |
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hi guys.. im trying to learn different things about timers. i have already generated a seconds counter using timer0. Now im planning to create a seconds counter using milliseconds with timer2. its like im counting in milliseconds then everytime i reach 1000 it will count 1 second. but my code seems to be counting so fast. can anybody help me figure out whats wrong with my code? here it is.. thanks everyone.
| Code: |
#include<16f877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600,xmit=PIN_C6,rcv=PIN_C7)
byte millisecond;
byte second;
#int_timer2
void time_isr()
{
if (++millisecond==1000)
{millisecond = 0;
++second;
printf("%d\n\r",second);
}
}
void main()
{
setup_timer_2 ( T2_DIV_BY_4, 250, 5);
enable_interrupts(INT_TIMER2);
enable_interrupts(GLOBAL);
printf("Press any key");
getch();
while (1){
}
}
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Jan 25, 2008 12:43 am |
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| Quote: | byte millisecond;
byte second;
#int_timer2
void time_isr()
{
if (++millisecond==1000)
{millisecond = 0;
++second;
printf("%d\n\r",second);
}
} |
What's the largest value a byte variable can hold ?
What data type should you use to declare 'millisecond', so that it
can hold a value of 1000 ? |
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Guest
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| Posted: Fri Jan 25, 2008 2:14 am |
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| yah.. the moment i clicked the submit button, thats when i realized what is wrong with my code.. it was so stupid of me.. thanks anyway.. |
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