UART doesn't work on STM32F407G-DISC1

[avatar_ang]

Hello
I'am new to STM32 and i want to create project that interface with user using uart with serial monitor
i  configured usart and used hal_uart tarsnmit function but it didnt work when the tutorial im following worked for him
what can be the issue?

[gbm]

What kind of help you expect without providing any code or schematic?

[Gyessine · Accepted solution]

Hello @avatar_ang  and welcome to STcommunity!
can you explain how are you trying to print your messages  in serial monitor?
in the STM32F407G-DISC1 ,the ST-Link embedded in the F407 discovery is not wired to a target MCU UART, so it has no virtual COMPORT capability.(the physical connection is missing.) you will need to add physical link wires to the Discovery board or connect to a separate USB-to-UART adaptor.
Maybe this is your issue.

If this isn't your issue , please provide more informations
BR
Gyessine

[Andrew Neil]

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@Gyessine wrote:

the ST-Link embedded in the F407 discovery is not wired to a target MCU UART, so it has no virtual COMPORT capability

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It does have the VCP (Virtual COM Port) capability in the ST-Link itself - it just lacks the physical connection from the ST-Link to the F407 Target MCU

[Andrew Neil]

Welcome to the forum.

As @gbm says, it helps to give more details about your situation - see:

How to write your question to maximize your chances to find a solution

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@avatar_ang wrote:

 it didn't work when the tutorial I'm following worked for him

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Was that tutorial specifically for the STM32F407G-DISC1 board?

Please also post a link to that tutorial.

What "serial monitor" are you using?

[avatar_ang]

thanks for mentioning the USB to UART converter we used one and it worked