12.1.0 nRF5 SDK Bootloader size issue

[RahulR]

I generated boot-loader (logging disabled) from SDK 12.1.0 for adding a signature check during DFU for nRF51

The problem I am facing is with the size of bootloader (hex file size 56,871 bytes).

Previously I was using bootloader (hex file size 40,050 bytes) generated from SDK 11.0.0

Application hex file size is 161,287 bytes

Soft device: S130: 305,123 bytes

While writing into flash through nRFgo Studio, I am following this sequence:

1. Upload Soft device hex file

2. Upload Application hex file

3. Upload bootloader hex file

On step 3 I am getting error "This hex file has data in SoftDevice region"

What are different ways to get over this issue?

[RahulR]

With these memory address ranges, I am able to write all 3 hex files successfully.

Thanks for you help.

But I want to be cautious about the memory addresses defined for Application hex file. This is how it looks now. I noticed that Application is not operating correctly.

Would you please suggest better address range for Application hex file? as this seems to be colliding with boot-loader.

[Amanda Hsieh]

Hi, 

Please see the Memory layout for Memory range nRF51 (S130 v2.0.x).

-Amanda H.

[RahulR]

Below is the memory map after writing flash with new boot-loader

Address Range
3FC00 - 3FD5B => 348 bytes
Bootloader
3AC00 - 3FADB => 20188 bytes
Application
000000 - 40000 => 262144 bytes
Application
1B000 - 28FDF => 57312 bytes
Soft Device
1000 - 1AFFF => 106496 bytes
MBR or Application
0000 - 7BF => 1984 bytes

The issue with this is Application is not starting normal.

While below is the memory map after writing flash with older boot-loader (keeping application.hex same)

Address Range
3FC00 - 3FFFF => 1024 bytes
Application
000000 - 40000 => 262144 bytes
Bootloader
39800 - 3CB77 => 13176 bytes
Application
000000 - 40000 => 262144 bytes
Application
1B000 - 28FE7 => 57320 Bytes
Soft Device
1000 - 1AFFF => 106496 bytes
MBR or Application
0000 - 7BF => 1984 bytes

With this, application is functioning normal.

[Amanda Hsieh]

Glad to hear the success.

-Amanda H.

[RahulR]

Not yet Amanda.

I am still facing issue with new boot-loader. I shared memory map with older boot-loader for reference.

Can you check what's wrong with this memory map?

Address Range
3FC00 - 3FD5B => 348 bytes
Bootloader
3AC00 - 3FADB => 20188 bytes
Application
000000 - 40000 => 262144 bytes
Application
1B000 - 28FDF => 57312 bytes
Soft Device
1000 - 1AFFF => 106496 bytes
MBR or Application
0000 - 7BF => 1984 bytes