How to count the instructions of functions/code?

[Arakel]

Hi again!
I know that normally there should be a separate topic for each question so I create 2 more.

How to count the instructions in CCS. I know that every function has its own built-in implementation, is there any way to count how many processor cycles takes 1 a part of my code?
_________________
Yo! I love learning and technology! I just do not have experience so do not be angry if I ask a stupid question about a detail! From so much to remember sometimes I forget the details in order to remember the big problems!

[temtronic]

Basic 'how to do it'
Simply print the listing file (projectname.lst) and you'll see all the machine code.
For most PICs, a 4MHz clock results in a 1us/instruction time, except for branches which take 2. The datasheet will have the instruction set and # of cycles for each.
If the listing doesn't show some code, you'll have to comment out the '#nolist' at the top of the function.

Others will reply with better directions....as I only program PICS for fun these days.

Jay

[Arakel]

Seems like a lot of work :D.

I am using the CCS ide. I know its possible with MPLAB, but I want to avoid installing MPLAB.
_________________
Yo! I love learning and technology! I just do not have experience so do not be angry if I ask a stupid question about a detail! From so much to remember sometimes I forget the details in order to remember the big problems!

[temtronic]

Not really. You don't need MPLAB. CCS makes the listing file. Take that and 2-3 pages from the datasheet of your PIC. Depending on how complex your program is, it'll take 10 minutes or 10 days to complete the task.
The PIC has less than 40 instructions so decoding is easy.

[PCM programmer]

The MPLAB vs. 8.92 Stopwatch feature can be used to measure how
many cycles (in microseconds) it takes to execute a block of code:
http://www.ccsinfo.com/forum/viewtopic.php?t=38351

MPLAB vs. 8.92 download (from Microchip website) without having
to sign up and register:
http://ww1.microchip.com/downloads/en/DeviceDoc/MPLAB_IDE_8_92.zip

Mplab X stopwatch:
https://www.youtube.com/watch?v=zt44UxcpUlc

But of course, you don't tell us your PIC, so we don't know for sure
if MPLAB 8.92 will support your PIC for Stopwatch.

[temtronic]

While the 'stopwatch' feature will tell you execution time, it doesn't count the actual lines of machine code. To do that, 'count the instructions', you need to dump the listing and see the code.
Now depending on 'how' the code was 'optimized' by the compiler's creator, it may be shorter or longer than what you think it should be. You can optimize for speed or size or go 'inbetween'. Also some programmers, not brought up on PIC assembler, may not know about the great instructions that excute in 1 cycle, relying instead of 5-8 lines of code where 1 will do the same operation.

Jay

[Mike Walne]

Or take the direct hardware route.

Depends on your code.

1) Simple repeating loop. Create a pulse on a spare pin, somewhere in the loop. Measure time interval between pulses. (Or you could simply toggle the pin)

2) To measure complex intervals, use different pins in different parts of code.

Mike