how to set the Timer for 3 sec

[MARTIN FR]

Hello everyone i ahve configured the button and i want to make the function like this press the button for 3 sec and then the device should start advertising can anyone suggest me how to set the timer and how to enable the advertsingmode after the button is pressed for 3 sec or more any suggestion or help will be most useful for me

Thank you

[Beau R.]

Conceptionally, I would use the RTC to determine the duration that the button was held. Bare in mind, you will have to take into account the de-bouncing of the button.When the button is pressed, I would clear the timer. When the button is released, have the GPIO for the button trigger (possibly PPI) a timer compare. Knowing the scaling factor that you used to initialize the RTC, you can know whether the button was held for 3 seconds, if so, then use the soft device to enable advertising using err = sd_ble_gap_adv_data_set( currentAdvertisementPacket, currentAdvertisementPacketLength, NULL, 0); followed by APP_ERROR_CHECK(err);

Hopefully that helped.

[MARTIN FR]

do you know any sample exmaple or code for setting the timer along with the button function?

[Beau R.]

Ya, I would look at the NRF SDK 9.0.0 example for GPIOTE: infocenter.nordicsemi.com/index.jsp then, navigate down to examples->Hardware Peripheral Examples->GPIOTE Example.

This will show how to turn an led on from a timed interrupt through the ppi channels. What would be left would be to hook up a button (another gpiote) trigger the start of the timer. I didn't look to closely, but, I'm pretty sure the timer used in this example will be RTC1.

As far as an example for configuring the button: I would look at the Button Handling Library. SDK->Libraries->Button Handling Library.