Application image integrity on stm32h7 flash

[Jpj.1]

Hi,

I am using stm32h745. I want to check the integrity of flash by checking crc checksum of the code in flash by storing the crc to last 4 bytes of flash. During image integrity check the calculated crc and stored crc need to compare. For this how should I set build settings in properties of STM32CubeIDE??? Could someone please help with this

[Pavel A.]

No change in build settings or properties is required. Just do what you want.

[Jpj.1]

How? dont we need to add post build command so as to generate checksum and store to last 4 bytes of flash?

[Pavel A.]

Of course, a post-build command is great for such things. But you've asked about changes in build settings...

The CubeIDE user manual explains the post-build commands.

For the script you can use "sh" with many usual gnu utilities, even on Windows.

[Jpj.1]

Can u please share any reference? I tried using command as "C:/Program Files/srecord/bin/srec_cat.exe" "app.hex" -Intel -fill 0xFF 0x08000000 0x080FFFFF -crop 0x08000000 0x080FFFFB -CRC32_Big_Endian 0x080FFFFC -CCITT -o "app.hex" -Intel but doesn't work

[Pavel A.]

What "doesn't work"? Any error message?

This works for me with CubeIDE 1.15.1:

And this:

[Jpj.1]

locations are not filled with FF, also shows error in crc calculation. Can u please share the command or script to be used. I am using stmcubeide 1.16.0