stop a timer through a PPI task

RE: stop a timer through a PPI task

Omnia — Sat, 14 Apr 2018 10:30:00 GMT

Hi Sylvain,

I thought having tried this method at the first read but it appears I made a too quick shortcut between the new nrfX API and the previous nrf one.

Indeed : nrfx_timer_task_address_get is the new nrf_drv_timer_task_address_get method

BUT nrf_timer_task_address_get does not seems to be equivalent to nrfx_timer_task_address_get.

My fault, Thanks to you for pointing out my mistake.

RE: stop a timer through a PPI task

Sylvain — Fri, 13 Apr 2018 18:29:20 GMT

Hi Omnia,

You should try the following way:

// Assigning task and event endpoints so that the PPI channel will shut down timer1 on timer2 COMPARE[0] match.
    err_code = nrfx_ppi_channel_assign(ppi_channel2,
                                          nrfx_timer_event_address_get(&timer2, NRF_TIMER_EVENT_COMPARE0),
                                          nrf_drv_timer_task_address_get(&timer1, NRF_TIMER_TASK_STOP));
    APP_ERROR_CHECK(err_code);

Don't forget to declare the timer1 instance.

Kind regards,
Sylvain