Undefined reference in nrf_sdh.c

[Sascha Schmidt]

Hi,

I'm using the TWI master example to test my application. I wanted to extend the example to write into flash (fstorage module), in a way that I can transmit data over I2C and store that in flash memory of the controller (it is intended to be used as dfu afterwards, but first I want to just store the firmwareimage in flash). I am working with GCC compiler. I added include files for the fstorage_sd module and extended the sdk_config.h, so that compiling works. Now the linker says I have a undefined reference to '__start_sdh_req_observers' in nrf_sdh.c file and I don't know what's the problem. Thanks for any help how I can solve this problem?

Thanks in advance!!!

Kind regards

Sascha

[awneil]

devzone.nordicsemi.com/.../166017

[Sascha Schmidt]

This I knew, but is there any documentation which module is needed for which funtionality? I'm searching the whole day in the infocenter and stuff, but couldn't get a hint.

Thanks for trying to help!!

[awneil]

Ha ha - I think you'll find me making the same complaint in one of those links!

How I approach it is:

1. Get the TWI example working on its own
2. Get the fstorage example working on its own
3. Merge the examples together:
   https://devzone.nordicsemi.com/b/blog/posts/merging-two-ble-examples-together

Then you can always go back to the working single example and use your IDEs browsing facilikties to see where it was finding those definitions ...

[Sascha Schmidt]

Yes I think you did

I think that's a good approach. And again thanks for your help and hints!!!