nrf51822 gpiote and timer capture pulse width

RE: nrf51822 gpiote and timer capture pulse width

AxisRobotics — Mon, 25 Jun 2018 03:36:32 GMT

Anyone ever put up a more complete example using PPI and GPIOTE to measure pulse width with SD enabled?

RE: nrf51822 gpiote and timer capture pulse width

xtting — Tue, 29 Dec 2015 00:40:15 GMT

I think may it's relay on what you config your timer, dont use any prescalor in your code.

RE: nrf51822 gpiote and timer capture pulse width

chenyu — Sat, 26 Dec 2015 05:59:40 GMT

I get the timer value in GPIOTE EVENT handler, So I think maybe something disturb the gpiote IRQ.

RE: nrf51822 gpiote and timer capture pulse width

chenyu — Sat, 26 Dec 2015 05:57:43 GMT

I add the ppi function in my code, Fortunately,the capture value error be cut off 50%(50us shaking). But, Is there anyway to thorough solve the program. Thank you!

RE: nrf51822 gpiote and timer capture pulse width

RK — Fri, 25 Dec 2015 09:39:16 GMT

Don't know about gazelle - if it has a high enough priority then it could certainly disturb the timing

RE: nrf51822 gpiote and timer capture pulse width

chenyu — Fri, 25 Dec 2015 09:30:39 GMT

I havn't use softdevice. the other mcu hardware I use is gazell/uart/adc. Can gazell disturb gpiote interrupt?

RE: nrf51822 gpiote and timer capture pulse width

RK — Fri, 25 Dec 2015 09:27:36 GMT

If you have the softdevice running it won't work doing it with timer interrupts. Use PPI and a GPIOTE task to capture the timer each edge and then measure it afterw