Are PPI events and interrupt connected?

RE: Are PPI events and interrupt connected?

Mitch996 — Wed, 30 Nov 2016 05:33:42 GMT

No need, it's quite clear, depends largely on how I configure it.

RE: Are PPI events and interrupt connected?

Petter Myhre — Tue, 29 Nov 2016 12:20:52 GMT

An event can trigger an interrupt, it depends on how you have configured the peripheral.

An event can trigger task, it depends on how you have configured the shorts of the peripheral, and the PPI.

I think this is well explained in Section 10 in the nRF51 Series reference manual v3.0.

Please add a comment if there is anything I need to clarify.

RE: Are PPI events and interrupt connected?

Mitch996 — Tue, 29 Nov 2016 01:27:51 GMT

Putting my question in a more straightforward way: Does triggering either one of them mean you have to trigger the other?

Or you can trigger just one?

Or normally, triggering one of them has no impact whatsoever on the other?

RE: Are PPI events and interrupt connected?

Petter Myhre — Mon, 28 Nov 2016 12:43:48 GMT

I having trouble understanding what you mean. PPI allows you to connect an event in one peripheral to a task in another peripheral, the event will trigger the task without CPU intervention. If you don't use PPI you usually configure the peripheral to trigger an interrupt when a certain event happens, so that the CPU can react to it, with for example setting a task in another peripheral.