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Bootloader with WDT and App_time

Hello:

I am working on a USB bootloader where I have enabled the WDT on entry. After I enable the WDT, the app_timer is set to feed the WDT and to also signal the end of waiting for USB input for a DFU.  When I enable the WDT, neither of the app_timers will not fire and the WDT eventually resets the device.  Our bootloader is set up to go to DFU if the previous processor start was caused by a WDT - the bootloader cycles forever issuing a WDT, going to DFU, issuing a WDT, ...   Is there a solution for this?  I want to leave the WDT enabled but cannot if the app_timer is disabled.

Thanks,

Joer55

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