CCS/MSP432P4111: Counting clock cycles with CCS9.2 on the MSP432

BIt_Banger

Part Number: MSP432P4111
Other Parts Discussed in Thread: MSP-FET

Tool/software: Code Composer Studio

I'm trying to use Code Composer to count clock cycles between breakpoints.

I've tried enabling the Profile Clock by clicking on "Run->Clock->Enable", but the clock always shows "0", and enabling the clock prevents me from being able to re-load code. I need to disconnect, reconnect, disable the clock, disconnect, then reconnect again before I can reload.

I found this article on clock counting: software-dl.ti.com/.../ccsv7_counting_cycles.html

The problem is when I click on the down arrow next to the "new breakpoint" button I don't see "count event" in the list of choices, I only see "Breakpoint", "Hardware Breakpoint", "Profile Control Point", "Watchpoint (read or write)", "Watchpoint with data". I do not see "count event".

What's the best way to count cycles between breakpoints on my setup? Thanks.

over 6 years ago

0 JohnS over 6 years ago

TI__Guru**** 162885 points

Does it work on a trivial program?

I have a MSP432P4111 LaunchPad. I have the simple program shown below.

I launched the debug session for my project.

From the Run menu I selected Clock -> Enable

The clock then shows up at the bottom

I placed a breakpoint on line 24.

I then run.

I get 29 in the clock.

Each time I run after that the clock goes up by 20.

For my test I just created a new project with the Project wizard and then added this code to the main.c

#include "msp.h"

/**
 * main.c
 */
void main(void)
{
    volatile int i = 0;
    volatile int j = 0;
	WDT_A->CTL = WDT_A_CTL_PW | WDT_A_CTL_HOLD;		// stop watchdog timer

	while(1) {
	    if (i<1000) {
	        i++;
	        j=i-1;
	    }
	    else {
	        i=0;
	        j=0;
	    }
	    j=i;
	}
}

I am worried that your breakpoint list is shorter than mine. This is what I see:

What kind of debug probe are you using? The LaunchPad has an XDS110 on it. Any XDS probe should work. If you are using an MSP-FET it is quite possible that the capabilities are limited.

Regards,

John

0 BIt_Banger over 6 years ago in reply to JohnS

Intellectual 880 points

John,

I think you're onto something because we're using the MSP-FET. We've found other issues, so we've purchased an XDS110, which may provide better clock-based profiling.

Thanks.

0 JohnS over 6 years ago in reply to BIt_Banger

TI__Guru**** 162885 points

Let me know if you run into issues with your xds110.

Regards,

John

0 BIt_Banger over 6 years ago in reply to JohnS

Intellectual 880 points

Hi John,

I have verified that the profile clock functions as expected on the XDS110.

Thank you

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CCS/MSP432P4111: Counting clock cycles with CCS9.2 on the MSP432