How to adjust BLE RAM Settings?

RE: How to adjust BLE RAM Settings?

Sebastien Huet — Thu, 07 Sep 2017 08:12:02 GMT

@DavidC: in your ld file.

RE: How to adjust BLE RAM Settings?

DavidC — Wed, 17 May 2017 09:04:52 GMT

Hallo Havard,

Do you know where I can change the ram settings in Eclipse? i got this warning WARNING:RAM start should be adjusted to 0x200020c8. WARNING:RAM size should be adjusted to 0xdf38.

RE: How to adjust BLE RAM Settings?

maxv — Mon, 11 Apr 2016 14:40:05 GMT

I'm getting similar messages, and I'm using the armgcc Makefile-based projects, so I edited ble_app_hrs_freertos_gcc_nrf52.ld, for instance, and set:

RAM (rwx) :  ORIGIN = 0x20002080, LENGTH = 0xdf80

RAM (rwx) :  ORIGIN = 0x20001FE8, LENGTH = 0xe018

And the warning messages go away.

RE: How to adjust BLE RAM Settings?

Håvard — Thu, 10 Mar 2016 09:55:54 GMT

Hi soumil.

when debuging, softdevice_enable() will tell you how much RAM the SoftDevice needs. The first 7680 (0x1E00) bytes are needed with your setup.

So in this case, you actually have 100 bytes of gap in the RAM that will not be used by the SoftDevice nor by your application.

You can go to the project options and reduce the ram start address from 0x20001F00 to 0x20001E00. (For Keil the menu is called "Options for Target" under "Project")

Later, if you add more vendor specific services or perhaps more links, the Softdevice will need more RAM and you can use the debug feedback to adjust the project settings accordingly.