Power cycle needed

[Yano]

Hi,

We are programming our devices (nRF52833) in production using a Segger Flasher Portable PLUS.

We use reset after programming via SFR access.

Our devices will not run code after they are programmed until they are power cycled.

Even the reset pin doesn't work!

After they have been programmed once power cycling is not needed if we re-programming.

Is this normal or is there another method of reset and running code in production? 

Thanks

[Jared]

Hi there,

Are you using the Softdevice? 

I see that the programmer can be used without a PC program, have you tried using it with nrfjprog? Does it behave the same? 

regards

Jared 

[Yano]

Hi Jared, yes we have a Softdevice included. No I haven't tried it with nrfjprog. How do we go about using it that way?

Thanks Ian

[Jared]

Hi,

I haven't tried the specific flasher that you're using but I would assume that it acts as the other stand alone SEGGER debug probes when it's connected to a computer. 

Normally you would use the program option of nrfjprog which will program a hex onto a nRF device. Such as:

nrfjprog --program ble_app_blinky_pca10040_s132.hex

where ble_app_blinky_pca10040_s132.hex is a prebuilt hex.

Could you try flashing a board with nrfjprog and see if acts the same?

regards

Jared