AM2434: tick counter to check timing in the application

Sung-IL

Part Number: AM2434
Other Parts Discussed in Thread: SYSCONFIG

Dear Champs,

Could you please let me know your recommendation which timer(tick counter) can be used to measure time in the application?

When my customer tried to use TIMER_TCRR for it, they found it was initialized after 'Reload count' value consumed. They want to have a counter(timer) to run continually from 0x0 ~ 0xFFFF FFFF.

Please recommend right timer for it or how they can set a timer for this purpose.

They also tried to set the timer as below, but have no idea how 'tick period' works.

When they tried to set timer as above using sysconfig and read the value using below code, they found tick period was shorter than 1sec.

With this sysconfig setting, do you think 'Tick period' should be '1 sec' and the timer should be reset per every '1 sec'?

Thanks and Best Regards,

SI.

over 4 years ago

0 Frank Livingston over 4 years ago

TI__Mastermind 30118 points

Hi SI,

You can use TimerP (SOC DMTIMER) for measuring elapsed time in the application: https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/08_03_00_18/exports/docs/api_guide_am243x/KERNEL_DPL_TIMER_PAGE.html

You could also use Cycle Counter (R5F PMU): https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/08_03_00_18/exports/docs/api_guide_am243x/KERNEL_DPL_CYCLE_COUNTER_PAGE.html

Sung-IL said:
With this sysconfig setting, do you think 'Tick period' should be '1 sec' and the timer should be reset per every '1 sec'?

Yes, the 'tick period' is the timer period, i.e. the amount of time before the timer expires. If interrupts were enabled, the timer would issue an interrupt every 1 sec.

TimerP_getCount() gets the current DMTIMER count in register TIMER_TCRR.

The timer clock runs at 25 MHz.

To determine the time between test_cnt1 and test_cnt:

take the different between test_cnt1 and test_cnt
multiply the difference by 25 MHz.

Regards,
Frank

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AM2434: tick counter to check timing in the application