Difference between bin, hex and elf file and their sizes

AKuma.2074 · ‎2022-07-13

Dear members,

After fiddling a bit with stm32cube ide, I found that after project compilation, I have 3 files generated i.e. elf, hex and bin, in my debug folder.

But the size of all three varies.

Elf is 925kb

Bin is 13kb

Hex is 36 kb

I know elf have lots of extra data + debug info

Bin is raw file without address

Hex is raw file with address

Now my question is, when i look into memory regions of build analyzer, and console output values of text, data and bss sizes, what does it represent?

It it the breakdown of bin or hex or elf file?

By default settings which file is sent to uc, through ide?

Elf, bin or hex?

Thanks and regards

Avinash

Tesla DeLorean · ‎2022-07-13

The .BIN file is the most representative of the data written into the MCUs memory.

From this flash image it unpack the data content into RAM, and zeros the BSS beyond that.

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Andrew Neil · ‎2022-07-14

BIN is a byte-by-byte binary image of what goes into the target memory - nothing more, nothing less. No gaps.
HEX is a text representation of the image; it has addresses and checksums - so it can be "sparse"
ELF is the full build output - it contains symbol information, debug information, etc, in addition to the code itself. BIN and HEX are generated from the ELF.

This is all general stuff - nothing specific to ST or STM32 or CubeIDE

AKuma.2074 · ‎2022-07-14

Ok. This part is clear to me, but what is the answer to 2nd part of the question?

AKuma.2074 · ‎2022-07-14

Ok. This part is clear to me, but what is the answer to 2nd part of the question?

Andrew Neil · ‎2022-07-14

"text, data and bss sizes, what does it represent?"

That's really an entirely different question!

Again, this is standard stuff; not specific to STM32 - or even embedded:

It's all contained in the ELF, but is irrelevant to Hex or Bin.

MQi.1 · ‎2024-12-10

@AKuma.2074 wrote:
By default settings which file is sent to uc, through ide?
Elf, bin or hex?

this is set in "run configuration" window inside DE.