stm32f429 custom board - schematic review
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‎2024-07-20 10:49 AM - last edited on ‎2024-07-24 1:11 AM by Amel NASRI
- 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.
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STM32F4 Series
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‎2024-07-21 1:12 AM
>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:
-->
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‎2024-07-20 11:36 AM
Where is the 3v3 regulator ? USB -> has 5V , so how cpu is powered ?
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‎2024-07-20 5:41 PM
- It is powerd through USB same like stm32f429 disc1 board.
- I want to replace with that with external power supply and debugger.
 
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‎2024-07-20 11:14 PM
But its not in the circuit - i cannot see it...
like this:
on F429 is here 3V supply:
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‎2024-07-20 11:56 PM
It is there in page 3 right side.
 
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‎2024-07-21 12:48 AM
Ooooo - sorry, i only looked on page 1 (didnt see the others)
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‎2024-07-21 12:58 AM
Your name topic custom is little out... You copy schematics seems ok except U5V and 5V , but when board some days working ... Your explain heating is amateur, measure with DC 3V 5V and currents... Your STMs seems is dead and need new . Way remove from board and place into other is next ... STLink part on custom boards isnt necessary.
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‎2024-07-21 1:12 AM
>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:
-->
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‎2024-07-21 5:40 AM
- Please suggest which debugger to use.
- To use UART can I make use of debugger or should I use usb to ttl converters.
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‎2024-07-24 1:20 AM
>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.
