ESB on the Sparkfun pro NRF52840 mini

[benkli]

Hello!

I'm struggling to get ESB running on the Sparkfun Pro NRF52840 mini. I successfully set up the toolchain and can build and flash the board. This works fine.

I built the ESB example of the SDK and flashed it on the chip. Running the esb_init(); function works fine, but the chip resets during the
nrf_esb_write_payload(&tx_payload) statement. According to sparkfun, the S140 SoftDevice is preinstalled, is this a problem? Or does the bootloader makes any trouble?

Thank you for your help!

Yours

Benjamin

[Ali Rumane]

Hi,

I don't think you need Softdevice for ESB i.e Proprietary RF. Softdevice is for Bluetooth protocol stack.

If you want to use ESB along with BLE DFU you can keep Softdevice in your memory and simply change Flash and RAM address as explained here.

You can learn more about Softdevice here and here

[benkli]

Thank you for your answer!

The chip also resets during receiving. I'm sending with the NRF52840-DK.

[Ali Rumane]

Did you enable DEBUG in your application which prints app error cause in your application?

I would suggest you read the following post for error handling.

https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/an-introduction-to-error-handling-in-nrf5-projects

Also you an try to read the POWER.RESETREAS register on startup to see what the reset source is.

[benkli]

Thank you!
Sadly I do not have a JLINK-debugger available, so I have to debug with LEDs.

After further investigation it seems, that the chip resets after the function call, i can switch an LED after the function, but the event handler is not called. The chip resets before that.

Nevertheless thank you!

[Kenneth]

I recommend to get an nRF52840-DK which include a debugger:
https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52840-DK 

[benkli]

I think i found a problem. When i deleted the
LDFLAGS += -Wl,--gc-sections in the makefile, the chip does not reset after sending. It does indeed send, i can receive it. But it somehow gets stuck after sending.