Hex file: adding dummy bytes - STM32 Cube IDE - GNU/LD

[Sanjay8344]

within the STM32 Cube IDE After creating a hex file, I noticed that some lines had less data than others due to linker separation. How can I use the STM32 Cube IDE to add dummy bytes to the memory?

 

[AScha.3]

> that some lines had less data than others

Thats "normal" in a (Intel-)HEX file.

see:

https://developer.arm.com/documentation/ka003292/latest/

 

>to add dummy bytes to the memory

Why ?

[Sanjay8344]

In order to extract data from a hex file and write it into memory while working on the bootloader, I must do a remote update. In order to accomplish this, I must write 0xffff in a location where there is less data on the specific lines. I now know that the linker script can be used to change it but not How to do that.

[Kier]

Other (better) hex generators will add fill bytes for you but I could not see a way to do that here.

Instead you can use fill statements in your linker script as you already understood. There is a nice summary here about how to proceed:

FILLing unused Memory with the GNU Linker | MCU on Eclipse

[Ayoub Cheggari]

You can do that without postbuild in the linker script and fill the sections by using Align command!

[Sanjay8344]

When I flashed the .hex file with the STM 32 utility, it automatically divided into two halves and was written appropriately. And I need to write 0xFFFFFFFF at that specific spot if I want to write it manually using the bootloader.

 

[Ayoub Cheggari]

There is no way that a file is changed by a tool! As I said before, you need to check which section ends at 0x800017C and use ALIGN to make sure it fits there!