Architectures and Processors forum Reading Cortex-A9 CNTFRQ register using ARM Compiler 5 inline assembly

State Accepted Answer
Locked Locked
Replies 7 replies
Answers 1 answer
Subscribers 350 subscribers
Views 2487 views
Users 0 members are here

Options

Related

How was your experience today?

This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Reading Cortex-A9 CNTFRQ register using ARM Compiler 5 inline assembly

bsp_user over 1 year ago

Hi,

Can I get an example of reading the CNTFRQ register in cortex-a9 using assembly inline of arm compiler 5 (DS built in) ?

I didn't find anywhere...

Top replies

Parents

0 Martin Weidmann over 1 year ago in reply to bsp_user

I think Ronan answered on the other thread. But one comment, for processors that support the Generic Timer, CNTFRQ reports the frequency of the timers - not of the core. The timer frequency is fixed and typically slower than the core's frequency (which might be subject to DVFS).
Cancel
Up 0 Down

Cancel

Reply

0 Martin Weidmann over 1 year ago in reply to bsp_user

I think Ronan answered on the other thread. But one comment, for processors that support the Generic Timer, CNTFRQ reports the frequency of the timers - not of the core. The timer frequency is fixed and typically slower than the core's frequency (which might be subject to DVFS).
Cancel
Up 0 Down

Cancel

Children

No data