How long does it take to setting IPC register at F28377D?

IL YONG EOM

Prodigy 210 points

I was used to IPC register for the semaphore configuration between the CPU1 and CPU2.

But it took too long to IPC register setting.

So I was measured to IPC registers setting time using the free-run timer.

START_TIMER(start_time);

IPCLtoRFlagSet(IPC_FLAG1);

STOP_TIMER(stop_time);

Measuring results is 135ns

I think it seems too long.

How about thinking of others?

Thanks for reading my post.

over 10 years ago

0 Gautam Iyer over 10 years ago

Guru 192875 points

Hi,

Did you try stepping inside the IPCLtoRFlagSet function for time consumption of each statement. Try using Clock profiling in CCS to get the clock ticks.

Regards,
Gautam

0 Vivek Singh over 10 years ago in reply to Gautam Iyer

TI__Guru** 117001 points

Setting the IPC flag will take only couple of CPU cycles. In this example (times) the overhead of function call itself will be much more compare to setting of IPC flag. These flags are used for handshake between two CPU (flag set by one CPU and polled by other one) so the delay will depend on what other CPU is doing when flag has been set.

To check the time from same CPU you need to use the register write (.all) code and then read the flag back and use the CCS profiling (as suggested by Gautam) to check the time (even here there could be some overhead because of loop used in poll).

Regards,

Vivek Singh

0 Vivek Singh over 10 years ago in reply to Vivek Singh

TI__Guru** 117001 points

Were you able to check the actual time for this using clock profiling?

0 IL YONG EOM over 10 years ago in reply to Vivek Singh

Prodigy 210 points

Thank you for your interest.

Sure, I can do it.

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How long does it take to setting IPC register at F28377D?