Transferring pca10056 project to nRF52811 hardware build error Output/Release/Exe/xxx_pca10056_s140.elf section `.init' will not fit in region `UNPLACED_SECTIONS'

[Truong Nguyen]

Hi all,

I'm trying to transfer my custom project pca10056 (which is to broadcast a beacon) to nRF52811 hardware and I'm facing some issues in the last stage of build.

FYI:

1. My pca10056 project can be built and ran sucessfully on nRF52840DK and the beacon can be discovered by using phone with nRF Connect.

2. I'm using SDK nRF5_SDK_16.0.0_98a08e2 with Softdevice  s140_nrf52_7.0.1

2. I'm aware of developing for nRF52811 documetation and some of discussion on this forum on the configurations including: RAM and Flash size

 https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v16.0.0%2Fnrf52811_user_guide.html

https://devzone.nordicsemi.com/f/nordic-q-a/48516/transferring-the-project-to-nrf52811-hardware---fpu-error/192748#192748

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

Here is the build issues I got:

    

Really appreciate help from all of you. Thank you

[Einar Thorsrud]

Hi,

I suspect you may bee seeing this issue, and that the same fix would be helpful for you.

[Truong Nguyen]

Hi Thorsrud, thanks so much for your reply. I follow the steps mentioned in that link and managed to build successfully my project. 

However, when I download my project to nRF52811, I got another issue. I doubt that my RAM and Flash setting are  incorrect.

Here is my Linker setting:

Can anyone help me with these settings? Cos I don't really understand the instruction from user guide:

In the linker script settings, adjust the linker script to match the maximum RAM and flash size of nRF52811.

• ROM END: 0x2FFFF
• RAM END: 0x20005FFF

[Einar Thorsrud]

Hi,

This error is expected as you have set FLASH_START=0x25000, but the size of S140 7.0.1 is 0x27000 (you can see this from the SoftDevice release notes). So using that SoftDevice your FLASH_START must be set to 0x27000, and the size adjusted accordingly. Note that you will not have much room for other data using this SoftDevice on the nRF52811 so it may be a good idea to consider migrating to anther SoftDevice unless you need some S140 features and have a very small application.

[Truong Nguyen]

Thanks for your suggestion. 

The main issue now is with these FLASH and RAM configurations (should be correct according to the Soft device specifications and tutorial), I can't build my project:

FLASH_PH_START=0x0
FLASH_PH_SIZE=0x30000
RAM_PH_START=0x20000000
RAM_PH_SIZE=0x6000
FLASH_START=0x27000
FLASH_SIZE=0x9000
RAM_START=0x20001678
RAM_SIZE=0x4988

Is there any way for me to still using S140 7.0.1 on nRF52811? Or any suggestion on other Soft device that u think that will provide more room for my project?

[Einar Thorsrud]

No, not unless you can shrink your application to make it fit. But do you really need S140 for a beacon? Can't you use S112 or S113?

[Truong Nguyen]

Hi, I now moved to the emulated version of my project, pca10056e (I have this together with pca10056).

However I have the build error as shown here:

I did try to enbale SPIS from sdkconfig.h but it does not solve the issue. any suggestion of the root cause here? 

[Einar Thorsrud]

Make sure you not only enable the NRFX_ defines in sdk_config.h but also the corresponding legacy defines, as they take precedence. For instance, you must set SPIS1_ENABLED and SPIS_ENABLED to 1.

Regarding the BLE related errors those seem related to you having switched to another SoftDevice (different from S140 or S132 which are the only two that support extend advertising), but still refer to that in your code.

[Truong Nguyen]

Thanks so much for all your support, I'll find a new approach for my custom project.