AM5708: Timer capture feature

Nancy Wang

Expert 8210 points

Part Number: AM5708

Hi,

Dose AM5708 have timer capture function? Or how to realize that function? Any driver or document?

over 6 years ago

0 Nancy Wang over 6 years ago

TI__Expert 8210 points

The customer used timer to capture the A and B phase outputs of encoder to test the speed.

0 Pavel Botev over 6 years ago in reply to Nancy Wang

TI__Guru**** 170625 points

Hi Nancy,

Yes, AM570x device support Timer capture mode. For more details refer to:

AM570x DM - section 5.10.6.9 Timers

AM570x TRM - sections 22.1 Timers Overview and 22.2 General-Purpose Timers

For event capture support, you might also explore AM570x PWMSS ECAP module and PRU-ICSS ECAP module.

Regarding SW driver support guides, I need to know if you are planning to use Linux, RTOS or else?

Regards,
Pavel

0 Nancy Wang over 6 years ago in reply to Pavel Botev

TI__Expert 8210 points

Hi,

Thanks for reply.

It is plan to use linux. Are there any drivers which related to timer capture mode are provided to refer to?

0 Pavel Botev over 6 years ago in reply to Nancy Wang

TI__Guru**** 170625 points

Nancy,

From what I am able to find, capture mode is not supported in timer driver. We have something in below files, you can check if that will be in help for a starting point.

linux-4.19.38/drivers/clocksource/timer-ti-dm.c

linux-4.19.38/include/clocksource/timer-ti-dm.h

linux-4.19.38/drivers/net/ethernet/ti/cpts.c

Check also below e2e threads:

Regards,
Pavel

Processors

Processors forum

AM5708: Timer capture feature