A simple and basic question

[Acetronics2]

Hi,

I remember Darrel wrote a little bit of program to measure program parts duration ... a SEARCH through those columns will be welcome.

The second way is to use MPSIM ( part of MPLAB ) with the stopwatch : result is quite perfect !

Alain

[T.Jackson]

@20MHz I'm guessing ~3uS per iteration of the loop.

Trent Jackson

[Ted's]

I do not understand your answers.

What you need to take out of this:

If you loop a variable from zero to 60000 on a pic being driven by a 20Mhz Quartz using the pbp code WHILE without adding a Pauseus XY into the loop, what does this value tell me about the time being elapsed.

[Acetronics2]

I do not understand your answers.

What you need to take out of this:

.

So, WE CANNOT ANSWER YOUR QUESTION ...

IF A = 0 ... the loop won't be executed ...

IF A != 0 ... The loop is infinite ...

so, the loop will last as long as A != 0 ...


This is what you have to take out of your hasty code snippet ...

Alain

[Ted's]

We? Are you schizophrenic?

[Acetronics2]

your answers.

I only remember having responded ONCE to you ... and I do think no one here can give you a precise time as an answer. ( except Fernand REYNAUD's " a certain time" ... Lol )

End of File for me ...

Alain

[falingtrea]

The best way to get your answer is to compile the code, look at the assembly listing, and compute the time to execute one cycle from that. Then multiply it by the number of cycles the loop is expected to run. You also need to check the PIC assembly code docs to see how long it takes to execute each assembly code. I have done this a lot in order to determine how long my interrupt routines are.

Also I think some of the comments are about the fact that the code sample you gave may not run the way you expect. "A" is not defined so the WEND duration is unknown. Also, A does not change so it is not a good loop control variable.

I wonder if someone has written a program that reads assembler files and tags execution times to all the microcode.

[T.Jackson]

We? Are you schizophrenic?

Don't worry about Alain, he doesn't bite, as long as he takes his meds he's fine. But when he forgets to take them

[Ted's]

Don't worry about Alain, he doesn't bite, as long as he takes his meds he's fine. But when he forgets to take them

Please muzzle him to be sure he won't bite.