System Clock Cycle time DM3730

Dean Wedel

What is the elapse time between system clock cycles on the Beagleboard xM?

I'm using the following to count clock-cycles and wonder what I need to use for a divider to arrive at MSEC ?

asm volatile ("MRC p15, 0, %0, c9, c13, 0\t\n": "=r"(value));

Thanks!

over 11 years ago

0 Cvetolin Shulev-XID over 11 years ago

TI__Guru 65405 points

Hi Dean,

You can check the frequency of the system clock by reading the value of the PRM_CLKSEL[2:0] SYS_CLKIN_SEL register field and the calculate the time T = 1 / f.

You can obtain more detail about the system clocks from the Technical Reference manual section 3.5.3 PRCM Clock Manager Functional Description at the link:

http://www.ti.com/lit/ug/sprugn4r/sprugn4r.pdf

Tsvetolin Shulev

0 Dean Wedel over 11 years ago in reply to Cvetolin Shulev-XID

Intellectual 760 points

Yes, this answer is acceptable.

There isn't any way to "accept" your answer, I can only respond with <NO> it didn't :-(

Thanks!

Dean

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System Clock Cycle time DM3730