Flashing nRF52DK pass but not running , J-Link and segger embedded studio

[Nihadh]

Hi,

I am using nRF52Dk dev kit with nRF_SDK_15. I did some using segger embedded studio with J-Link for debugging. I am way past the blinky stuff. I am able to flash and run on the PCA_10040 kit. I belive all my flashing and compiling environment are set. 

I was trying to use inbuilt ble_uart_app example. I am able to compile it, when I try to flash it, I could see the J-Link pop up erasing and flashing, but my example wouldnot run. I tried erasing the and re-flashing, it still would not run. I also checked whether I am flashing the soft_devices.hex its getting flashed. I tried with nfjprog, still the same. But my blinky runs anyway, if i flash it. So I went to debugging mode and clicked the play button,now my example runs. But its not running when I just flash it in donwload. The example is not occupyng too much program memory, roughly 40% of it. checked the address spaces, all seems fine. 

Thanks

[Joakim Jakobsen]

Hi!

I don't have any problems with the ble_app_uart example from SDK 15.

Did you make any modifications or changes at all to the code?
Could you test the pre-compiled hex file in the SDK? You should find this in the;
sdk_folder/examples/ble_peripheral/ble_app_uart/hex/ble_app_uart_pca10040_s132.hex

I also checked whether I am flashing the soft_devices.hex its getting flashed.

Which version of the softdevice are you using?

Best regards.

[Nihadh]

Hi Joakim,

Thanks for the reply. I didnot make any changes to the code. I tried flashing them. I was using this "ble_app_uart_pca10040_s132.hex". is the SDK15 unstable any problem over my interface. I am using J-Link over USB.

Best Regards,

Nihadh

[Joakim Jakobsen]

So the pre-compiled hex file: ble_app_uart_pca10040_s132.hex didn't work either?

Note that this hex-file contains both the softdevice and the application, so you don't need to flash the softdevice first.

SDK15 should not be "unstable". I don't know about any known issues with the the ble_app_uart example in SDK15.

[Nihadh]

Hi Joakim,

Thanks for the inuput. I tried flashig the sample application nfrjprog uility and it works. previously I was merging the ble_app_uart_pca10040_s132.hex with generated application.hex, I think my merging was wrong, when I try to flash using nrfjprog.

I am building my custom application, can you suggest a way to merge my application.hex and softdevice.hex(I think this has to be raw not including any application) and flash using nrjprog. I am getting conflicts on merge

[Joakim Jakobsen]

Hi!

You can use the mergehex executable, which is a part of the nRF5x Command Line Tools.

Merging files with mergehex

If you have any further questions, please let me know.

Best regards,
Joakim

[Nihadh]

Hi,

I have built my application. But my application.hex needs to be merged with s132 hex, so i tried to merge with ble_app_uart_pca10040_s132.hex, But is this the correct way or should I use other softdevice hex. 

Anywasy I tried to merge with the ble_app_uart_pca10040_s132.hex, but I get the conflict error