I have STM32F407VET6 black and i am trying to setup serial communication with this device

[SRath.4]

In my laptop device manager this device only shows up as stm32 bootloader and not as virtual com port or anything else to communicate , Can anyone help please! as trhere's not much help available regarding this same controller,

[Peter BENSCH]

Welcome, @SRath.4​, to the community!

You surely mean the board STM32 F4VE from STM32-base?

Well, even if the STMicroelectronics logo is used illegally there, it is not a board from STMicroelectronics. In this respect, the first point of contact would be the manufacturer of this board. But it is no wonder that this company is misusing the logo, because it also produces illegal counterfeits of the ST-LINK debuggers, which usually also contain counterfeit STM32s.

But after a cursory glance at the circuitry of this board, where I could already see the same systematic errors as with the infamous Blue Pill, it was obvious that there is only the STM32F407VET6. By the way, it remains to be hoped and checked that this is an original STM32, as counterfeits were also very often used with the Black Pill.

In any case, apart from the STM32, there is no debug interface as, for example, the well-known and genuine NUCLEO boards from STMicroelectronics have. However, this would require that you see a virtual COM port in your host computer, for example.

I wish you good luck trying to get support from stm32-base.org.

Regards

/Peter

[SRath.4]

There's no any help available on stm32-base, can you help me setup communication ?

[Peter BENSCH]

Since it is not certain that it is a genuine device from STMicroelectronics, I cannot really help.

However, you could connect an ST-LINK/V2 or ST-LINK/V3MINIE or ST-LINK/V3SET to the JTAG/SWD connector P1, which should allow you to connect.

Good luck!

/Peter

[SRath.4]

The board i have is STM32F407 and official st webpage provides documentation for this, so i has to be official board only. (official web:STM32F407/417 - PDF Documentation)

[Tesla DeLorean]

That's a chip, it could be on all manner of boards. Review documentation.

Did Peter identify the board you own? Attach picture.

T​hat board.looks to have a 20 pin JTAG header, if so you can use ST-LINK to download and debug.

[SRath.4]

yes, the board has 20 pin JTAG header, but is there any other way other that JTAG?

The issue is that when i connect bourd using USB it shows as STM32 BOOTLOADER device under device manager so how can i change it to COM or something else?

[Peter BENSCH]

As I said and Tesla confirmed: if you want to have a COM port, you should connect one of the suggested ST-LINK. The term JTAG is just a general term for the connector, the ST-LINK connects to the target via SWD over this connector.

[Tesla DeLorean]

You'll have to use STM32 Cube Programmer in USB/DFU mode, pushing your firmware image that way to the loader.

If you want the USB to do something normally you're going to have to write and load a USB Device firmware, like a VCP Device which the PC could then find an associate a COM port.

To have any chance of building/debugging you're going to need an ST-LINK pod to facilitate that.

Perhaps the board vendor has examples you can download, build and test.

[SRath.4]

Ok, thank you for this help, SO can i use VCP while implementing this device in practical use, like to send some command from laptop or PC and receive data collected by controller back to pc or is there any other method to do that because device won't run normally in DFU mode, right?