Soft Device + Application flash doesn't work with Eclipse

[Ben34]

Hello all,

I struggle to program nrf52 on Eclipse, and it works fine with Keil. Let me explain :

With Keil :

-I first flash softdevice 5.0 manually with JFlash Lite

-I flash my code with Keil,

it works fine. I can flash a merged hex file and my code after that, it is okay, my code is running

With Eclipse :

My code compiles (the same code), but if I flash the same softdevice, and my code, my code is not running.

I checked my project ld file and .map file : all is okay (i.e : same parameters in Keil),  my code starts at 0x23000

I am running out of ideas... Any help?

Thank you!

[Ben34]

UPDATE : I found out what is going on : I am using the default .ld file provided in an SDK example and the FLASH lenght was specifed to 5D000, wich is too much : I had data around 0x39000 which were corrupted. When I specify Keil parameter (0x15000), my code doesn't compile anymore! I am facing flash overflow! Now I know Keil was performing size optimisation I have to tell gcc to do. (because in Keil, the code compiles)

I set the same Optimisation level as Keil (O2) but I don't know how to tell gcc to use microlib library.

Could someone help please? 

[Nguyen Hoan Hoang]

Well, what is your nRF52 chip ? The nRF52832 has 512KB flash which 0x80000.  The firmware starts at 0x23000 which gives you the length 0x80000 - 0x23000 = 0x5D000 size. 0x15000 is only 86KB, way too small.  The nRF52810 has 256KB Flash if I remember. 

[Ben34]

Yes it is nRF52832. I have data stored at 0x38000 and for the moment, I can't move them. 0x38000-0x23000 = 0x15000, that is why I specified this size for the code. At 0x3D000 there would be a bootloader in the near future, and after, a buffer zone for soft device, and a buffer zone for code. I could use -Os, which is very useful, but I need another code optimisation to make my code fit. That is why I looked for libraries like microlib

[Nguyen Hoan Hoang]

Ok I see.  You can use __attribute__ section on the data array then map that to anywhere in the linker script, See https://stackoverflow.com/questions/19781375/how-to-place-constant-at-specific-address-with-ld-linker-command-file

That way you don't need to reduce your flash length.