Kinetis Design Studio中的主题 Re: C Algorithm, Execution Time

C Algorithm, Execution Time

walter_gallegos — Sat, 11 Jun 2016 12:23:31 GMT

I'm working with a sliced algorithm, so I like to know the execution time of each slice.

Exist into KDS a tool to calculate the execution time of a C algorithm or process ?

Re: C Algorithm, Execution Time

BlackNight — Sat, 11 Jun 2016 12:46:23 GMT

Hi Walter,

I'm using the Segger SystemViewer (see https://mcuoneclipse.com/2015/11/16/segger-systemview-realtime-analysis-and-visualization-for-freertos/ ) for this kind of measurement. With

SEGGER_SYSVIEW_OnUserStart(id)

I can start a measurement point, and with

SEGGER_SYSVIEW_OnUserStop(id)

I have the corresponding end point. You can have multiple different IDs so you can measure different spans. Using the SystemViewer I get the exact timing. I hope you are using a Cortex-M4(F) core, then you get the number of cycles. Otherwise on an a M0+ (because it does not have a cycle counter in hardware) the timing is measured with the SysTick ticks.

I hope this helps,

Erich

Re: C Algorithm, Execution Time

walter_gallegos — Sun, 12 Jun 2016 20:17:29 GMT

Hi Erich

Thank for answer, Segger SystemViewer apparently do the task; unfortunately I'm using a P&E pod. So, I don't have access to a J-Link.

I will place some assert to validate pre/post-conditions into the slices; is not the same but be warrant non overlapping working condition.

Regards

Walter