About RCola.2

RCola.2 · 2023-08-24

Hi, i'm Roberto.In my Project i need to update firmware from USB. I wrote a code that when i send a command (a determinated string) from my PC to my board by USB, the code jump from my application to the bootloader address so i can update my firmware...

RCola.2 · 2023-03-25

My idea is that:I want to put a resistor and a capacitor on BOOT0 pin. When normal code is running and i will go to update the firmware, i will send a command to USB. When MCU will receive this command, MCU will set BOOT0 pin to high state and charge...

RCola.2 · 2023-08-29

I have update about my problem.I removed the HSE oscillator and put (with a patch board) an external clock, the : ASDMB-8.000MHz-XY-T and it's work perfectly !! Now if i set BOOT0 pin to VDD and power on my board, my PC enumerate The board as "STM32 ...

RCola.2 · 2023-08-29

Yes, in my application i am using the USB (as Virtual COM)

RCola.2 · 2023-08-25

I'm so sorry for my mistake. It was the part number of Ethernet oscillator.The correct part number is: NX3225GD-8MHZ-EXS00A-CG04874 and the capacitors are 4.3pF X8RThank you again. Roberto

RCola.2 · 2023-08-25

Hi TDK.I don't think it's hardware problem because in my application the USB works well. I'have the USB problems only with bootloader. I have a crystal oscillator 8MHz : ECS-250-18-30-GM-TR and 4.7pF capacitor.Thank you for link, i try to do this.

RCola.2 · 2023-08-25

Hi Pavel.I tried to set BOO0 and BOOt1 for Bootloader startup.My PC find the Nucleo Board and enumerate the USB: "STM32 BOOTLOADER".In my custom board, PC try to enumerate the USB port but can't do this. I think the board, with this settings, restart...

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STM32F2 Bootloader question

Hi i am Roberto, For my project i need to update the firmware from USB port so i need to use internal bootloader. The MCU is contained into a close box so i can't set BOOT0 pin manually. Do you have any idea ?

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