Hi Guys
I've got a strange problem where a binary that works fine on a nRF51822 QFAC does not run on a QFAA
I know that the difference between these two devices is the RAM size, so I did used some code that malloc's various sizes of memory to determine how much is available and on the QFAA I'm seeing
2304 bytes (allocation in 16 byte steps)
On both devices, because I set the linker (GCC) directive file to specify the device only has 16k memory
MEMORY { FLASH (rx) : ORIGIN = 0x0001C000, LENGTH = 0x24000 RAM (rwx) : ORIGIN = 0x20002800, LENGTH = 0x1800 }
If I change the RAM size in the linker and recompile and re-run on the QFAC I see that it has more memory, as my RAM test returns 19024 bytes
But.. These figures don't tally
i.e 2304 + 16384 does not equal 19024
BTW. I'm using the S130 SoftDevice, and just running a simple application which advertises and accepts a connection (so that I can send serial data to the device)
If I recompile and upload to the QFAA rather than copying the binary that was running on the QFAC, the application does not run correctly
The Advertising data is not getting setup correctly and although I can see the device I can't connect to it using a test app (Light Blue running on an iPad)
So I suspect I have some sort of RAM allocation issue
But at the moment this isnt making any sense to me at all.
BTW. I thought it may be a Programmer issue (I'm using a JLInk) but I've tried reading back the code and it does seem to program both devices the same.
I do have another SWD programmer I could try, but this does look like a RAM issue to me.
Does anyone have any ideas what is going one ?
Thanks
Roger
