I have recently ported our working project to SES. The project uses S140 with nordik SDK 15.20 on nRF52840 custom board. the project also makes use of freeRTOS.
It's important to note that using the makefile project everything works smoothly. including flashing and running.
When importing the project i started out from a working SES example of S140 with GATT and took my memory fragments from there. the size and definition of heap size and stack size i took from the original makefile.
I made sure to merge both '-D' flags from the SES project and from the makefile.
finally after it all compiled running it on the board gets me to hardfault.
Debugging the hardfault was also quite problematic:
1. the original hardfault handler i defined by including the gcc implementaiton and the hardfault handler file and enabling the module in the sdk_config was called but the break point stops first in memory location 0x00000978 which is defiantly not part of my program, it's on the flash and reads double pointer ref and branches to it: `[[0x20000000] + 12]` where did that code comes from ? could not find it in the project nor in the sdk directory, softdevice ?
2. the exception prints:
<error> hardfault: HARD FAULT at 0x00000000 <error> hardfault: R0: 0x20000464 R1: 0x00000000 R2: 0x200099AC R3: 0x200099AC <error> hardfault: R12: 0x20005750 LR: 0x00000000 PSR: 0x6000000E <error> hardfault: Cause: The processor has attempted to execute an instruction that makes illegal use of the EPSR.
So LR is 0 ??? also the PSP is really weird: 0x20000464 while the MSP is 0x2003ff50.
no idea where to even start looking for clues.
i'm on this for like 2 weeks now, any hints ?
