Building my first code with softdevice

[PaulP]

Hi, I'm trying to build and install my first code that uses the BLE / softdevice to my NRF52-DK

I'm using Windows 10, Eclipse/gcc and nRF5_SDK_14.2.0_17b948a I'm able to build and download the blinky code to my DK (all working as expected),I'm able to download the "ble_app_uart_pca10040_s132.hex" from "\examples\ble_peripheral\ble_app_uart\hex" to my DK (all works as expected, not this hex file is 452KB). I have the code from "C:\Dev\Nordic\nRF5_SDK_14.2.0_17b948a\examples\ble_peripheral\ble_app_uart\pca10040\s132\armgcc" loaded in Eclipse it shows no errors, but 4 warnings in main.c -

Description/Location/Type

Unused declaration of variable 'm_advertising_ble_obs' line 110 Code Analysis Problem

Unused declaration of variable 'm_advertising_soc_obs' line 110 Code Analysis Problem

Unused declaration of variable 'm_gatt_obs' line 109 Code Analysis Problem

Unused declaration of variable 'm_nus_obs' line 108 Code Analysis Problem

I am able to compile the project with no errors, however the resulting .hex file is only 108KB in size and when loaded to the DK does nothing.

A I missing something simple? what information should I include here to help resolve this?

Thanks

Paul P

[Matt]

Have you loaded the softdevice into the nRF52 already?

[PaulP]

Hi Matt, I have re-loaded the soft device from the SDK, but no change! I 'think' the softdevive must be OK as the pre-compiled example run's fine - unless this somehow has the softdevice within itself. (this would explain my .hex size difference?)

[Matt]

The ble_app_uart example is about the Nordic Uart Service (NUS) correct? To test that one you need to have another nRF device (another DK or the nRF51 dongle) or the nRF Connect app in the smartphone to connect to the nRF52 DK and then send some text from the dongle/app to the DK. Please refer to

infocenter.nordicsemi.com/index.jsp Software Development Kit > nRF5 SDK > nRF5 SDK v14.0.0 > Examples > Bluetooth low energy examples > BLE Peripheral > UART/Serial Port Emulation over BLE

[PaulP]

I have tested the SDK pre-compiled example with a PC COM Terminal to DK, and DK via BLE to phone (running Nordic app) as mentioned before that all works as expected.

I have followed the instructions as in the link above (tho for SDK 14.2) I just can't compile a working version myself.

[Matt]

So with your own version do you see the DK in the nRF Connect app when you power it up? Are you familiar with Segger Real Time Trace? You can add segger rtt to the main() of the sample code and see if there is anything displayed in the RTT viewer in the windows pc.