Nrf51 dongle , boot on power ? (without pressing the boot button)

[aleks]

Hi

We have a nrf51 dongle for use in a school prosject
When the nrf51 dongle is connected to the USB slot in a computer it boots fine without holding the button when powering up the device

But we are using the external Vin and ground connections for using it together with a other device
Our problem here is that the dongle need the boot button pressed whil powering the device.
In our usage, we are not able to fysical touch the device every time we want to give it power to boot.

Is it possible to disable the need for the button to be pressed while powering ???

Thanks !

[Bjørn Kvaale]

It seems like you are resetting the dongle to be able to power it. You should be able to use NVIC_SystemReset(); to reset the dongle in your code (see link). If you are using the softdevice in addition, you can use the sd_nvic_SystemReset() instead. In general, it's easier to learning to program on Nordic devices by starting with the nrf52 dev kit if possible.