ble_stack_init() error code 4: Insufficient RAM allocated for the SoftDevice

[KEITH]

I'm using SDK version 15.0.0_a53641a on nRF52840 with softdevice s140_nrf52_6.1.0_softdevice.hex.

When I execute the code below in ble_stack_init(void) , I get an error code of 4 which I believe means "Insufficient RAM allocated for the SoftDevice"

If I continue to debug inside nrf_sdh_ble_enable(&ram_start) , I get an NRF_LOG_WARNING saying I need to change the RAM start location from 0x200022e0 to 0x2003ffdc.

So I update my .ld file to reflect this...

 

However, when I clean the project, rebuild and try to debug (via eclipse) the code crashes from the very beginning. As if it cannot execute the code now that I changed the RAM ORIGIN field in the .ld file.

Does anyone have any suggestions on how to fix this issue?

[Nguyen Hoan Hoang]

Normally it should work.  Check to see if the .ld you modified is actually the one linked with your project.

[KEITH]

Hello Nquyen, Yes I'm sure it is the correct .ld file because once I make the change to RAM Origin to the new value, 0x2003ffdc, the program won't event start in debug. If I change RAM Origin back to the previous value, 0x200022e0, the program will at least start in debug and execute up nrf_sdh_ble_enable command in ble_stack_init function. 

[Nguyen Hoan Hoang]

are you sure the required ram start is 3ffdc  and not 3fdc ? 3ffdc is beyond the total ram size of 0x10000 (64KB).

[KEITH]

Here is a snapshot from eclipse debugger showing p_app_ram_start which is the value I am supposed to use:

[Nguyen Hoan Hoang]

exactly, your ram setting is wrong.  It should be 3fdc not 3ffdc

[KEITH]

I'm confused now. Shouldn't we take the value from p_app_ram_start that we find in debug and use that value to update the value in the "RAM" line in the .ld file? Is so, then the above debugger screen shot is showing 0x2003ffdc not 0x20003fdc. Please help me understand.

[run_ar]

What is the ret_code returned by sd_ble_enable in this case? And how have you configured the SD?

[Nguyen Hoan Hoang]

What is showing is what you set in your ld.  If your ld setting is less than require by SD, it will update the ram_start with the correct value.  If it is already bigger than need it, it won't change it.  I believe you made a typo mistake by adding an extra f to the address.   

3ffdc = 255KB which is much bigger then 64KB ram limit.

3fdc = 15KB which is more likely the correct value.