Function for actual clock cycle

Ken Dert

Prodigy 80 points

Hello,

is there a function to get the actual clock cycle of the processor. (I´m using the Tiva Launchpad)

I couldn´t find such a function.

Thank you for your help.

over 12 years ago

0 Amit Ashara over 12 years ago

TI__Guru**** 244440 points

Hello Ken,

Do you mean the System Clock Frequency which is going to the Processor?

Regards

Amit

0 Ken Dert over 12 years ago in reply to Amit Ashara

Prodigy 80 points

No, I mean the number of the clock cycles the processor passed through until this function is excecuted.

(Like the count event between two breakpoints)

0 Amit Ashara over 12 years ago in reply to Ken Dert

TI__Guru**** 244440 points

Hello Ken,

There is no API function for such a case. What you would need is ETM Trace so that execution performance can be tested between functions. This is available on TM4C129 only.

Regards

Amit

0 Ken Dert over 12 years ago in reply to Amit Ashara

Prodigy 80 points

Oh OK. Thank you for your answer.

Just for clarification: There is no function or a register where you can read the actual clock cycle?

0 Amit Ashara over 12 years ago in reply to Ken Dert

TI__Guru**** 244440 points

Hello Ken,

You can write a test code with timer readout, but every time you want to check the number of processor clock taken from one function to another, you would need to recompile the test code. It would be fairly accurate.

But no breakpoints.

Regards

Amit

Arm-based microcontrollers

Arm-based microcontrollers forum

Function for actual clock cycle