STM32F407 Breakpoint crossed-out

[tensaisakuragi06]

When i try to add breakpoint, there is a cross sign on breakpoint symbol. So even if the code works, breakpoint never works.

I try to add __asm("BKPT 0"); but it also did not work.

I am not sure what is the problem.

My CubeID version is: 

Version: 2.1.1

Build: 28236_20260312_0043 (UTC)

[Andrew Neil]

Are you trying to place a breakpoint where there is no actual code?

Please show a screenshot of what you're seeing.

Please give details of your board, and what debug probe you're using - see: How to write your question to maximize your chances to find a solution

[tensaisakuragi06]

[Andrew Neil]

You didn't answer the other question:

Please give details of your board, and what debug probe you're using

Are you able to single-step that code?

Can you place breakpoints elsewhere?

[tensaisakuragi06]

My board is STM32F407 discovery. I connect my board with USB-cable. For UART, i use TTL converter. I did not do single-step. When UART gets data (LED_ON) command from hercules, with my setup program must stop. But LED becomes on but program did not stop at the line which is on screenshot. I did not use specific probe or any kind of tool. My setup is basic.

[Andrew Neil]

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@tensaisakuragi06 wrote:

 I did not do single-step..

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Please try it - does it work ?

Also please try setting breakpoints elsewhere - do they work ?

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@tensaisakuragi06 wrote:

 I did not use specific probe or any kind of tool. 

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The STM32F407 discovery board has a built-in ST-Link

[tensaisakuragi06]

Whenever i add breakpoint it displays a cross symbol on it. Videos on internet, other ppl breakpoints doesnt not have a cross symbol on it. I try step-by-step, putting different lines of codes, inside the uart interrupt, outside the interrupt, inside the main etc. Breakpoint is not active. I made search about it but can not solve it yet.

[Andrew Neil · Accepted solution]

CubeIDE is built on Eclipse, so it's often useful to search the internet using "Eclipse" rather than "CubeIDE" as a keyword.

eg, googling "eclipse crossed-out breakpoint" found this - does that help?

(other internet search engines are available)

[tensaisakuragi06]

Thank you. I try to figure out for 1 day. On ..flow forum, they mention  a settting which is Run> Skip all Breakpoint. In my setting this is selected. But i am sure i did not select it.