High frequency clock output from PCA10040

RE: High frequency clock output from PCA10040

Kenneth — Wed, 21 Aug 2019 07:23:26 GMT

Basically it configure the timer to auto clear counter value when reaching the set cc_value value. In this case it looks like you have set cc_value to '1', which I assume you intend the timer to clear and generate an event every 1/16MHz.

RE: High frequency clock output from PCA10040

Kasraa — Tue, 20 Aug 2019 19:50:42 GMT

Hi Kenneth,

Thank you for your response. The code you suggested differs from mine by only the following line:

     nrf_drv_timer_extended_compare(&XCLK_TIMER, (nrf_timer_cc_channel_t)0, 1UL, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, false);

However, I do not understand what this does. Would you be able to guide me towards something that may explain this to me?

I appreciate your time.

Best Regards,

Kasra

RE: High frequency clock output from PCA10040

Kenneth — Tue, 20 Aug 2019 07:53:25 GMT

So, with PPI you can connect an event from one peripheral to trigger a task of another peripheral, for instance a compare0 event from a timer to toggle a pin controlled by the GPIOTE peripheral.

In your case it seems that you are trying to do the same as found in:
\nRF5_SDK_15.3.0_59ac345\examples\peripheral\gpiote

Have you tried that example?

Best regards,
Kenneth