Input timer capture function development using PPI

RE: Input timer capture function development using PPI

Pooja Uchagaonkar — Fri, 17 Jan 2020 06:44:46 GMT

Yes, I can use nrfx_gpiote directly as well. But it creates problem for interrupt handler.

Thanks,

Pooja

RE: Input timer capture function development using PPI

Tim — Fri, 10 Jan 2020 04:37:59 GMT

Glad your issue is resolved. I speculate that you could use nrfx_gpiote and access GPIOTE peripheral directly at the same time. I think I'd lean towards just accessing GPIOTE directly. Not sure if there are pros/cons to either. Perhaps a Nordic support engineer will offer advice here.

Best,

Tim

RE: Input timer capture function development using PPI

Pooja Uchagaonkar — Thu, 09 Jan 2020 06:33:29 GMT

Hi Tim,

Thanks a lot for solution.

I accessed GPIOTE peripheral directly as per you referred and the issue is resolved. Now I can measure the any input pulse width using PPI timer capture development. But one another thing is, I also want to use GPIOTE peripheral driver file nrfx_gpiote in my application for simply handling another GPIO's interfaces.

Is there any another alternative solution for this? OR I have to use it directly for all.

Regards,

Pooja Uchagaonkar

RE: Input timer capture function development using PPI

Tim — Tue, 31 Dec 2019 16:36:02 GMT

I had the same need. I have a sensor attached to a GPIO pin and periodically it goes from hi to low, remains low for a short time period (200-500ms), then returns to hi. On HiToLo, I want to start a timer, then on LoToHi, stop the timer, all using GPIOTE and PPI. The solution is to directly access the GPIOTE peripheral rather than using the driver. See this post.