How to find the current Cortex-M3/M4 MCU systick count

microeval · ‎2014-08-10

Posted on August 11, 2014 at 07:28

Hi All,

Is there any way to count the current systick value for Cortex-M3/M4 based MCU?

For some type of Cortex_M4 based MCU has the ''portable_delay_cycles:' function for delay functionality. But i want the systick count.

I searched in the forms, but no info.

Thanks for your help,

Ram.

frankmeyer9 · ‎2014-08-11

Posted on August 11, 2014 at 09:40

You can of course access the Current Value Register of the Systick peripheral, which is usually the ''

->VAL

'' member.

I hope you are aware what you are doing, as it counts with the core clock frequency, and wraps around.

Tesla DeLorean · ‎2014-08-11

Posted on August 11, 2014 at 09:51

24-bit, and can be 1/8 of the CPU, for 32-bit and CPU clock, consider DWT_CYCCNT

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microeval · ‎2014-08-11

Posted on August 12, 2014 at 06:47

Thanks clive1,

Regards,

Ram.