Automatic startup method by turning on the power

[Daichi]

Hello everyone.

I don't know how to start the program when using Soft device.

In the case of example such as example / peripheral / blinky, if it is executed once from Segger with F5, it will start automatically when the power is turned on.

However, in the case of example / ble_peripheral / ble_app_blinky, it will not start up properly without debugging with Segger.

How can I get started using a method other than debugging?

Best regards.

[Amanda Hsieh]

Hi, 

You can use nRF Connect-Programmer to flash the image, e.g., ble_app_blinky_pca10056_s140 under \nRF5_SDK\examples\ble_peripheral\ble_app_blinky\hex for nRF52840DK. 

-Amanda H.

[Daichi]

Hi, Amanda!

By using nRF Connect-Programmer, it was confirmed that ble_app_blinky could be written and executed on nRF52840 on the DK board.

However, when P19 Debug out is connected to another nRF52840, ble_app_blinky does not appear to start. But I confirmed that Debug is started from SEGGER.

[Amanda Hsieh]

Hi, 

Could you try to connect J-Link Command with SWD?

Did you power the external board? And is it running at the same voltage level as the nRF52840 DK?

Should make sure that SWDCLK/SWDIO and VTG+GND are connected on the nRF52840 DK, in addition to the board is powered and running at the correct voltage.

-Amanda H.

[Daichi]

Hi,

When I tried it on another prototype board with the same component structure, I was able to write it well.
I think it's probably a board issue.

Thank you for your response.