s113 softdevice Ram size with Buttonless DFU.

[elva]

Hello.

I'm working with nrf52833 custom board and S113 softdevice for Buttonless DFU.

The pieces of information below are my FLASH & RAM address settings.

(Reference page: https://devzone.nordicsemi.com/guides/short-range-guides/b/getting-started/posts/adjustment-of-ram-and-flash-memory)

FLASH_PH_START=0x0
FLASH_PH_SIZE=0x80000
RAM_PH_START=0x20000000
RAM_PH_SIZE=0x20000
FLASH_START=0x1c000
FLASH_SIZE=0x56000
RAM_START=0x20001198
RAM_SIZE=0x1ee68

So, I've checked the ram size using by 'sd_ble_enable' function and I got this result.

"Change the RAM start location from 0x20001198 to 0x2001ffd4."

It uses almost 123kB of RAM and brings out the result of the lack of the Application's RAM.

Is it right?

also, I've tested with PCA10040(nRF52832 DK) with the S132 version and got this result.

"Change the RAM start location from 0x20001198 to 0x2000ffd4."

I think there is a difference in usage ram between S113 and S132, but It's too big.

 

How can I use the S113 softdevice with enough RAM for my Application?

Thanks.

[Amanda Hsieh]

Hi, 

No, that means SD requires 0xffd4 bytes (65.5KB) for RAM. You can take a looks at the release note under nRF5_SDK\components\softdevice\s113\doc. 

Regards,
Amanda

[elva]

I've solved this issue with your advice. Thank you, Amanda.

[Amanda Hsieh]

Happy to help.

-Amanda