How can the first interrupt be missed when BUTTON_PULL is set to NRF_GPIO_PIN_PULLDOWN?

[Kadex]

I'm using the ble_app_multilink_central example app. In the pca10400.h I changed #define BUTTON_PULL to NRF_GPIO_PIN_PULLDOWN.

The problem is that the first pin interrupt (from low to high) is missed on all the ports. After this the interrupt works fine. Does anyone know what this can be and how to solve this?

[Sigurd]

Hi,

Why are you setting this to pull-down? On the nRF5-DK the pushbuttons are active low, meaning the input will be connected to ground when the button is activated (pushed). The nRF-pin connected to the buttons are therefore configured as input with active internal pull-up.