I am using a STM407VET6 development board, and when I connect it via USB, it is recognized as "STM32 ST-Link" as a USB device, but not as a VCP. How can I solve this problem?

[tacchi]

Already made wire connections but It was not recognized as a Virtual COM Port in Device Manager.

Could it be that this device does not allow serial communication using TeraTerm or similar?

[KnarfB]

Have you upgrade the ST-LINK firmware uisng STM32CubeProgrammer or such? The tool should state the link type: Debug+MSC+VCP

hth

KnarfB

[tacchi]

Yes.

Already upgraded.

[KnarfB]

Maybe you have the old STM32F4DISCOVERY and not a STM32F407G-DISC1?

running out of ideas

KnarfB

[tacchi]

Yes.

I have STM32F407V"E"​T6, not STM32F407VGT6(F407G-DISC).

I can write a program to the microcontroller and blink LEDs, etc., but UART communication (VCPs such as COM4 and COM5 do not appear in the device manager) is not possible using Teraterm, etc.

[KnarfB]

Okay. Footnote on page 12 of UM1472 Rev 7 states that VCP does not apply to that board. They have probably changed the ST-LINK chip. You can add an external UART to USB adapter (FT232).

hth

KnarfB

[tacchi]

Does this mean that this device will not allow UART communication with a PC without an additional USB adapter(FT232)?

[waclawek.jan]

This

• is not a genuine ST board, it's a clone
• as the STLink is STM32F103C8T6, it cannot support the STLinkV2-A firmware which has the VCP (that would require STM32F103CBT6), only the older STLinkV2 firmware without VCP

JW

[tacchi]

Understood.

Thank you very much.