Device unable to boot, stuck in Soft Device

[jlongo]

We have a device containing a BMD350 module (which is based on the nRF52832_xxAA). The device behaves normally, but at some point, two devices failed in the exact same way. The nRF52 is stuck in the Soft Device and unable to reach our bootloader or application. The stack trace shows shows the following:

0x00016274 -> 0x000251c4

We are using Soft Device s132 v7.0.1

Our board has an external 32 kHz oscillator, which we probed and can see that there is indeed a clock in this case. Power supply looked good. Furthermore, when in this state, a soft reset, hard reset, or reflash of the firmware would not get it out of this state. A power cycle got things working again.

Any recommendations on further debugging or a solution to this issue?

[Simonr]

Hi Jeff

0x000251c4 is inside a SoftDevice sleep function, meaning your chip goes to sleep without waking up, so you will need to check your wake up source and read the peripheral registers that generate the wake up interrupt and that the sleep is exited. 

Best regards,

Simon