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I have un big problem with STM32F4 (Cortex-M4) Project.

jeanfrancois TRAP

there was one year, I make a project C++ with 6918 Luminary (a Cortex-M3, now TI) without any problem.
Todays, I want to create the same project for STM32F4. But, at the start, the Heap and the Stack are not properly initialized. The first create object finished in a exeception "UsageFault_Handler". I do not understand why !

Please, help me.

I'm not talking about the simulation mode of STM32F4 is not working.

excuse me for my english. I am french.
Best Regard
Jean-Francois

  • 0

    You will need to tell us exactly what changed. Are you sure that the initialization fails and not you own program? Are you using the correct startup file for the chip you are now using?

  • 0 in reply to Tamiryan Michael

    Hello,
    and thank for your answer.

    I simply created a new project with the ST32F407VG for the ST’s demo board (MB997B).
    I use the automatic file created by µVision 4.23 : The name is “startup_stm32f4xx.s”
    But I think I found my first problem: should not create object in function "SystemInit", because the Heap is not yet initialized. In The Main is ok.
    But the simulation mode : don't work. It started at 0x00000000, but the code is at 0x08000000.