need help in calculating execution time

[kinsiro]

hi, i m using pic16f84a in my project.. i need to know how to calculate the execution time in PICBasicPro.. can any1 teach me..
i m using the following instructions:

if...then
endif
pulsin
pulsout
pauseus
high
low
x = y

thx..

 

[Nigel Goodwin]

You can't calculate it as you don't know what code it produces!.

 

[Oznog]

Not possible for any compiled language. Now if you're building a clock or whatever, counting instructions can be a difficult way to write code more than a few lines. You can't add or remove lines without affecting the timing, and loops of variable length and/or conditional branching won't use constant timing.

You can time simple bus protocols (like serial comm, i2c, SPI) by number of instructions. But for many applications you want to set up a timer and use interrupts.

 

[akg]

hi, i m using pic16f84a in my project.. i need to know how to calculate the execution time in PICBasicPro.. can any1 teach me..
i m using the following instructions:

if...then
endif
pulsin
pulsout
pauseus
high
low
x = y

thx..

an approx solution
start a timer before ur code starts , stop it at the end . and check the timer val.(assumption no timer overflow) .else use interrupt based counting (need to calculate the interrupt overhead also)