SDKv11 Heart-rate example works only in Debug mode on nRF52 DK board

[balaji]

Hi,

I recently procured a nrRF52 DK board (PCA10040, v2.0.0 with nRF52832) for our new product development activity. 

I tried following precompiled binaries present in SDKv11 none of them works.

nRF5_SDK_11.0.0_89a8197\examples\ble_peripheral\ble_app_hrs\hex\ble_app_hrs_s132_pca10040.hex

nRF5_SDK_11.0.0_89a8197\examples\ble_peripheral\ble_app_hrs\hex\ble_app_hrs_s132_with_dfu_pca10040.hex

nRF5_SDK_11.0.0_89a8197\examples\dfu\bootloader\hex\dfu_dual_bank_ble_s132_pca10040.hex

Following test binaries are working fine.

nRF5_SDK_11.0.0_89a8197\examples\ble_peripheral\ble_app_uart\hex\ble_app_uart_s132_pca10040.hex

nRF5_SDK_11.0.0_89a8197\examples\peripheral\blinky\hex\blinky_s132_pca10040.hex

I even tried to build and load the heart rate sample source code to the nrf52 DK board, still did not work. But when i run the same heart rate code in debug mode (in Keil) i see the board advertise and able to connect from nRF Connect Application. As soon as i exit the debug mode the board stops working. 

One more observation is, when i change the LFCLK to internal oscillator, i see advertisement for approx 1 sec and the device stops working, but the same works fine in debug mode again. 

I wanted the board to be working with SDKv11 heart-rate source code to reuse most of my previous product design resources. Please help me to resolve this issue to continue our new product development work.

Regards,

Balaji

[Jared]

Hi,

I just tested a couple of the pre-compiled binaries that you've mentioned and it worked successfully here. I'm not sure why it doesn't work on your side. How are you flashing the board with the pre-compiled lib? Are you using nrfjprog? What optimization level are you using when you try to flash the application from Keil? 

regards

Jared

[balaji]

Thank you for the reply Jared!

I used nRFgo Studio for programming the pre-compiled ble_app_hrs_s132_pca10040.hex file from application option. The same way i programmed the ble_app_uart_s132_pca10040.hex and it  worked fine.

My Keil target setting are default one, please take a look on attached images.

Regards,

Balaji.

[Jared]

balaji said:

I used nRFgo Studio for programming the pre-compiled ble_app_hrs_s132_pca10040.hex file from application option. The same way i programmed the ble_app_uart_s132_pca10040.hex and it  worked fine.

 ok, so it works with nrfgo, but not when you use Keil?

[balaji]

No Jared, the heart rate binary did not work in both the cases. The only working condition is, I need to run the heart rate example code  in debug mode from Keil. As soon as I stop the debug mode, the hardware stops executing the code. Even tried power restarting the hardware, no luck. Pleas let me know for further clarification.

[Jared]

I find it very strange that the pre-compiled examples are not able to run. Is the DK unmodified, have you shorted any solder bridges? What are you using as a supply for the DK? Could you try using nrfjprog and flash the DK with one of the precompiled examples? Remember to also flash the softdevice!

[balaji]

Thank you for the reply Jared!

I have a fresh nrf52 dk with no modifications. As I mentioned before, pre-compiled ble_app_uart_s132_pca10040.hex is working fine without any issue. But heart rate example is not working fine.

Let me try with nrfjprog and update you ASAP.