TDA4VM: How to reset Acore system counter after reboot

yuchao du

Part Number: TDA4VM

Hello TI experts,

We develop on tda4vm, I want to record some bootup phase timestamp with read Acore system counter.

If cold boot, I can read exact bootup timestamp from Acore system counter.

BUT if reboot, I read the overlying value from Acore system counter, Acore system counter not be clear and reset after reboot，which I donot hope.

So I want to know, how to reset Acore system counter after reboot?

Thanks

yuchao

0 Keerthy J over 3 years ago

Hi Yuchao,

Are you referring to the GTC counter on TDA4VM?

- Keerthy

0 yuchao du over 3 years ago in reply to Keerthy J

Hi Keerthy J,

I just see it.

Seems as GTC every time I used, I need EN it, right?

If it is, I donot need it because I want record boottime from Acore poweron.

Thanks

yuchao

0 Keerthy J over 3 years ago in reply to yuchao du

yuchao du said:
If it is, I donot need it because I want record boottime from Acore poweron.

Yes A72 node has GTC clock as well. So that is enabled as well. I did not understand your comment above.

- Keerthy

0 yuchao du over 3 years ago in reply to Keerthy J

Hi Keerthy,

I mean, if GTC need EN in code every times, I will miss the time between poweron to EN code.

0 Keerthy J over 3 years ago in reply to yuchao du

Yes. I believe you mean from the hardware power on? That's correct.

- Keerthy

0 yuchao du over 3 years ago in reply to Keerthy J

Hi Keerthy,

ok, I will try other way.

Thanks

Processors forum