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HI,
please ,can any one explain to me how to use proteus 7.4 sp3 in order to transform
aschematic design into alayout suitable for making pcb .
is there away to give the program acertain circuit design, and the program immediately
transforms it into asuitable alayout for pcb??
---------- Post...
HELLOW,
please can any one help me about activating cp(code protect) ?
if i make this configuration on( cp=on) ,then can anybody make acopy about my code?
and ,in the future, if i want to program the same pic again,can i make this task?
i think the error was resulted from actual frequency of crystal.
because i thought the frequency was exactly 32.768 KHZ , but when measuring its frequency with amultimeter , it was
26.5 KHZ!!!!!!!!!!!!!!!!!!!! i was very surprise
thank you,
i think the best solution is adjusting the time of the last interrupt, which goes directly to the beginning of next day, until error is minimized. of course this requires patience and waiting every 24 hours.
in this way the error will not accumulate with time.
i will try this method...
OK,THANK YOU.
SUPPOSE I HAVE USED a simple tick counter from an interrupt , with the a 32kHz crystal .
is the 1.7 seconds error in 24 hours will be removed?
and if not, can we compensate it by software?
and how can i trim the crystal??
i will now replace the 4MHZ crystal with 32768HZ crystal from awatch, and measure accuracy in 24 hours.
if errors are still happening,then i will think of interrupt routines.
hi,
i think the errors in my project are due to stability of crystal affected by temperature variations.
i plan to use asmall crystal from awatch (( i think it is 32768 HZ)). and to apply the same code to the pic after modifying numbers in delay loops.
BUT THE QUESTION IS: is this crystal...
help me, 2 seconds time error in along delay time
hi,
i have written this program in assembly language, having two delays:
(5 seconds and 3595 seconds) , the sum of them equals 1 hour.
the program must turn on ALED for five seconds,then turning it off for 3595 seconds
then repeating the...
OK, THANK YOU .
IF ALL THESE FACTORS( TEMPERATURE,crystal frequency, deviation over time......) HAPPENED: WHAT IS THE DEGREE OF ACCURACY DO YOU THINK WE WILL HAVE IN THIS SITUATION??
IS IT ACCEPTABLE ??
THANK YOU VERY MUCH
but now ,assume i want adelay time 18 hours.
the code is generated as follows :
is this time is very accurate??? if use this this delay every day,what do yoy expect the error ,(accumulating error) in ayear??
the code is as follows:
; Delay 64 800 000 000 machine cycles
...
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