AM335x ICEv2 ISDK clock tick

Kenichi Yoshii

Intellectual 2050 points

Other Parts Discussed in Thread: AM3359

Hi experts,

Could you explain how the Clock.tickPeriod is affected to the AM3359 HW?
For example, on ICE2, in the app.cfg (acutally this file is in IDK), if you define like;

Clock.tickPeriod = 1000

Then, how/where does this 1000us = 1ms is generated from clock sources (crystal?)? What will be the register setting.
We could not find reference manual for this, and can't find where the timer/clock registers are set.

Could you advice?

Thanks.

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

I have notified the ISDK team. They will respond here.

0 Lalindra Jayatilleke over 10 years ago

TI__Mastermind 30365 points

Kenichi,

Apologies for the very tardy response. Appreciate your patience.

For AM335x devices, it my understanding that SYS-BIOS gets its clock from DMTIMER which uses typically uses the 32KHz clock source. I would guess that its using the DMTIMER2 (base address 0x48040000) in the PSDK examples.

Would suggest going through the SYS-BIOS training material for the clock module. This explains how the clock.tickperiod is affected:

https://training.ti.com/ti-rtos-workshop-series-7-10-using-clk?cu=7475

Also, please check out this thread which discusses a similar question:

https://e2e.ti.com/support/embedded/tirtos/f/355/t/360858

Hope this helps.

Lali

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AM335x ICEv2 ISDK clock tick