No button release event after wakeup

[Eddie]

Hi.

Using an nRF52832 and SDK11. I use a button for wakeup. Problem is, when releasing the button, I do not receive a release event after wakeup (so the first release). Checking the bsp_button_event_handler() function in bsp.c, it looks like there is a static array of release events. These are checked at release, but only set at push. So of course, this is not set on a wakeup button as there is no push event in that case.

Is there a reason that the release events are set this way at button push? Shouldn't this be set and fixed when configuring the buttons (with e.g. bsp_event_to_button_action_assign)? Why is change in release event checked?

[eyss5]

Hi, I have the same problem. Was this ever resolved? When I hold a button down upon wakeup, it doesn't detect the first release. Using nRF52832/nRF52 DK on SDKv16.0.0. S132 v.7.0.1. Using example ble_app_uart_c.

edit: i will try this tomorrow: https://devzone.nordicsemi.com/f/nordic-q-a/49536/button-push-and-release-events

[Einar Thorsrud]

Sounds good. Please let us know if that (wrong active state configuration) was the problem.

[eyss5]

Hi, unfortunately still doesn't work. I implemented the buttons using app_button, but realized it's basically the same thing as what the BSP does, not sure the benefit of initializing everything app_button. More simple maybe?

Anyway, my problem is if I hold down a button upon startup, it doesn't detect the first release. Any thoughts?

[Einar Thorsrud]

Hi,

This issue is related to how the state machine in the app_button implementation works. It always assumes that the pin will be in idle state when the app button library is initialized. This post describes it very well and also suggests a workaround.

[eyss5]

awesome, i'll check it out thanks.

edit: this works