Evaluating code speed

Ant Scranney

Other Parts Discussed in Thread: LM3S6965

Hi,

I am using Code Composer with a few different microcontrollers (MSP430G series, C2000 and Stellaris LM3S6965). The datasheets for all of these list how long various Assembler instructions take in clock cycles, I am however using C.

What I am trying to ascertain is how long certain function routines I am using take to execute, is there away of extracting this information from CCS. Either by converting the code into Assembler or ?

Thanks,

Ant

over 12 years ago

0 Gautam Iyer over 12 years ago

Guru 192875 points

Ant, you can use the Profile Clock present in CCS to check the clock cycle consumed by C instructions. Here's how you can use it:

When you're in Debug mode: Go to Run -> Select Clock Enable

Regards,

Gautam

0 Ant Scranney over 12 years ago in reply to Gautam Iyer

Expert 1275 points

Hi Gautam,

Thanks for the quick response and the tip. Also I am using Code Composer v5.5

Just tried this in a Stellaris program that runs ok. With the debug window opened I click the run menu, then scroll down to clock, but all the options are "grey'ed out" I have tried hitting run and pausing, and seeing if the clock options become accessible but no effect.

I have Stellarisware loaded and this is the old LM3S6965 board, just wondering if this feature is supported for these? I don't have a MSP430 or C2000 to hand to try this at the moment.

Regards,

Ant

0 Gautam Iyer over 12 years ago in reply to Ant Scranney

Guru 192875 points

Ant, as per my knowledge clock works fine with C2000 and MSP430. I've never worked on Stellaris family, so can't comment. If you can observe that the option has been greyed out, then it means that Stellaris might not be supporting this feature.

Regards,

Gautam

0 AartiG over 12 years ago in reply to Ant Scranney

TI__Guru**** 173310 points

Ant Scranney said:
Just tried this in a Stellaris program that runs ok. With the debug window opened I click the run menu, then scroll down to clock, but all the options are "grey'ed out"

Please see this wiki page for information on how to measure clock cycles on Stellaris devices:
http://processors.wiki.ti.com/index.php/Watchpoints_for_Stellaris_in_CCS#Configure_a_Count_Event

0 Ant Scranney over 12 years ago in reply to AartiG

Expert 1275 points

AartiG,

Thanks for the link.

Just scan read the details as not had time to try it yet, but looks like this will solve the issue. Will give it a go Monday.

Best regards,

Ant

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Evaluating code speed