Hardware event handler

[Davide]

Hello, I need to connect an event handler (i.e. a function) to two NRF_RADIO events: -NRF_RADIO->EVENTS_ADDRESS -NRF_RADIO->EVENTS_READY

I know I should use the NRF_RADIO interrupt handler, but I can't. I'm using the bluetooth and then the softdevice is running. If I try to enable the interrupts in the NRF_RADIO->INTENSET the device goes into hard fault.

Anyway I've found a workaround by using PPI and GPIOTE. The PPI toggles an output pin when it receives one of the events, the output pin is externally shorted with an input pin, and this pin is configured to call the handler function. The nice thing is that it works, but I don't like to physically short the output an input pins...

Is there a better way to do it? I mean, is there a way to connect the PPI task end point to an handler function? Or maybe directly connect the NRF_RADIO->EVENTS_x to and handler function?

[Hung Bui]

Hi Davide,

You can use the EGU unit. Please find information about that in the nRF52840 spec (chap 46).

Basically it's a dummy unit that provide possibility to trigger an event from a task. You can simply connect PPI to one of EGU's task and then handle the correspondent EGU event when PPI fires.

[Davide]

cool!!! Thank you very much, that was exactly what I was searching for!