RE: question regarding RAM block

Hung Bui — Wed, 15 Jan 2014 11:04:41 GMT

Hi Hjjeon,

To clarify, when you use S110 softdevice, RAM region 0 is from address 0x20000000 to address 0x20001FFF and RAM region 1 is from 0x20002000 to 0x20003FFFF.

When the S110 stack is active, RAM region 0 reserved for the stack and application can only use RAM region 1.

You can find the memory resource map at section 9.1 in the S110 softdevice specification.

So it's not possible for the application to have more than 8KB of RAM when the softdevice is active.

However, you can have some more space for memory by reducing the size of heap area if you don't do dynamic memory allocation (malloc).

You can configure the heap size in arm_startup_nrf51.s

Please refer to this thread.