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    • Problem STM32F407G-DISC1 STM32F407G-DISC1 StdPeriph HSE_VALUE PLL_M

    Posted by Ay3.14 on 2016-12-24 11:55

    Hi,

    and thank-you to ac6 for providing us the "System Workbench for STM32".

    Creating a new C project and due to board selection "STM32F407G-DISC1" and
    "StdPeriph" library usage, SW4STM32 generates:

    a) file "stm32f4xxh" which contains no "#define STM32F407G" but:
    "

    1. if defined(STM32F40_41xxx)
      defined(STM32F427_437xx)
      defined(STM32F429_439xx)
      defined(STM32F401xx)
      \
    defined(STM32F410xx)
    defined(STM32F411xE)
    defined(STM32F469_479xx)

    #if !defined (HSE_VALUE)
    #define HSE_VALUE ((uint32_t)25000000) /*!< Value of the External oscillator in Hz */
    #endif /* HSE_VALUE */
    "
    and therefore will set "HSE_VALUE" to 25000000 insteed of 8000000

    b) file "system_stm32f4xx.c" contains no "#define STM32F407G" but:
    "

    1. if defined(STM32F40_41xxx)
      defined(STM32F427_437xx)
      defined(STM32F429_439xx)
      defined(STM32F401xx)
      defined(STM32F469_479xx)

    #define PLL_M 25
    "
    and therefore will set "PLL_M" to 25 insteed of 8.

    Why happens this?
    What can I do to let MCU run with 168 MHz (without manipulating above generated files)?

    Albert

    Reads: 8042