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harry123
Graduate II
July 20, 2024
Solved

stm32f429 custom board - schematic review

  • July 20, 2024
  • 2 replies
  • 6020 views
  • I am  using my own custom board which is replicate of stm32f429 disc1 development board.
  • I replaced main mcu chip i.e stm32f429 and stlink chip from my disc1 board to my custom board. After using my custom board for for many days now it stopped working.
  • The board is getting heated and st-link not detected error is getting popped one i connect usb power supply.
  • I unable to find the reason for its failure.I have attached my custom board schematic.
  • Now I want make another custom board with external debugger what changes I have to make in the schematic to make my board work like disc1 board.
    This topic has been closed for replies.
    Best answer by AScha.3

    >The board is getting heated and st-link not detected error 

    What is getting hot ?  F429 , F103, or both ?

    (Typical for a fried cpu is "heat", maybe overvoltage on a pin or by ESD ... )

     

    >

    • Now I want make another custom board with external debugger what changes I have to make in the schematic to make my board work like disc1 board.

    just see a "BlackPill" circuit, attached, for F4xx, this is what you want ;

    +

    a working st-link , you need then.

    Just...not the full JTAG , only swd/swc is fine:

    AScha3_0-1721549145712.png

    -->

    AScha3_1-1721549548229.png

     

    2 replies

    A
    AScha.3
    Super User
    July 20, 2024

    Where is the 3v3 regulator ?  USB -> has 5V , so how cpu is powered ?

      H
      harry123Author
      Graduate II
      July 21, 2024
      • It is powerd through USB same like stm32f429 disc1 board.
      • I want to replace with that with external power supply and debugger.Screenshot_20240721_060941_Drive.jpg

      A
      AScha.3
      Super User
      July 21, 2024

      But its not in the circuit - i cannot see it... 

      like this:

      AScha3_0-1721542333845.png

      on F429 is here 3V supply:

      AScha3_1-1721542470761.png

       

       

      A
      AScha.3Answer
      Super User
      July 21, 2024

      >The board is getting heated and st-link not detected error 

      What is getting hot ?  F429 , F103, or both ?

      (Typical for a fried cpu is "heat", maybe overvoltage on a pin or by ESD ... )

       

      >

      • Now I want make another custom board with external debugger what changes I have to make in the schematic to make my board work like disc1 board.

      just see a "BlackPill" circuit, attached, for F4xx, this is what you want ;

      +

      a working st-link , you need then.

      Just...not the full JTAG , only swd/swc is fine:

      AScha3_0-1721549145712.png

      -->

      AScha3_1-1721549548229.png

       

        H
        harry123Author
        Graduate II
        July 21, 2024
        • Please suggest  which debugger to use.
        • To use UART can I make use of debugger or should I use usb to ttl converters.
        A
        AScha.3
        Super User
        July 24, 2024

        >Please suggest which debugger to use.

        Debug in IDE ? GDB or OCD . (I dont understand your question...)

         

        >To use UART can I make use of debugger or should I use usb to ttl converters.

        Depends on the debug probe, you want to use: st-linkV3 has serial , rx /tx at 3v3 level.

        If your st-link dont have serial, need a usb to ttl converter to use usartX for tx/rx to PC terminal program.

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