Using timer as counter

RE: Using timer as counter

haakonsh — Tue, 04 Sep 2018 09:13:17 GMT

See the PPI Example.

I'd start by playing with the TIMER and GPIOTE via HAL. Set up some GPIOTE tasks like pin toggles that are triggered by a TIMER's compare tasks. Use a digital analyzer to see how the GPIOs behave. This will teach you the basics of the PPI system (EVENT --> TASK) and how to set up the TIMER and GPIOTE.

The PPI system uses the register address of an EVENT and couples it to the register address of a TASK. All drivers or HALs should have a function for getting the address of an EVENT or TASK. Those addresses are also given in the Registers chapter of a peripheral's technical specification.

RE: Using timer as counter

Newbie — Tue, 04 Sep 2018 04:50:36 GMT

Hi,

Can you help me to build algorithm using Timer, GPIOTE and PPI?

I am not aware about the use of PPI. I have used Timer as well as GPIOTE. Still not sure how that will help me to get time between high to low transition of pins.

Thanks,

RE: Using timer as counter

haakonsh — Mon, 03 Sep 2018 08:13:35 GMT

You need to use TIMER + GPIOTE via PPI.

See Timer Example, Timer HAL and driver, GPIOTE abstraction and driver, and PPI HAL and driver.