[sasha]

Thank you very much, it seems working.

[sasha]

A lot of thanks, including .cpu cortex-m3 actually solved the problem. Likely, M3 and M4 are not that different.

However, I have further request: how to supply custom .lds file to the linker? Simply including .lds file to the project does not work; the file seems to be ignored.

[sasha]

Hi,

Finally, I was able to try the suggestion. First of all, changing file extension to .s works, the compilers recognizes it and tries to compile.

However, I run into further problem. After I corrected assembler syntax to what required in GCC, the compiler still reports errors on lines like ldr sp,[r0] or push {r4-r11,lr}. The commands are legal in STM32F407 that I use; however, the compiler obviously applies restrictions of the initial THUMB. In the GDB properties I selected correct target processor. So, my question is: is it a way to instruct the compiler about correct instruction set?

Additional question: I cannot find where to specify recommended -S option. Will you provide more directions?  

[sasha]

Thank you for quick answer.

I will try your directions.

[Author]

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