Endless Loop when running SCB_EnableDCache()

Oussama_Baklouti · ‎2024-08-19

I'm using stm32H750B-DK and i'm trying to send a frame via LIN protocole every one second .
but when i run the code nothing happen .
when debugging i found that the code blocked in an endless loop in SCB_EnableDCache() function

SofLit · ‎2024-08-20

Could the problem be in the board ?

You need to confirm that with another board.

Did you run a very simple code for example toggling a LED with this board?

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TDK · ‎2024-08-20

It's exceedingly unlikely the problem is with the hardware.

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Oussama_Baklouti · ‎2024-08-20

i tried toggling a LED and it worked fine and when debugging the SCB_EnableDCache() take a lot of time so i stepped into the function and debugg it manually and it worked . But when i connected a logic analyzer to see if the frame of the LIN protocole was transmitted there is nothing

SofLit · ‎2024-08-20

i tried toggling a LED and it worked fine and when debugging the SCB_EnableDCache() take a lot of time so i stepped into the function and debugg it manually and it worked .

Do you mean you have the same issue with SCB_EnableDCache() even with just a simple example?

When I say a simple example, I mean you need to create another project where you just toggle a LED and call SCB_EnableDCache() before.

Did you do this?

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Oussama_Baklouti · ‎2024-08-20

I created a new project and i called the SCB_EnableDCache() function
and when i runned the code , the toggle works fine but when i debugg the SCB_EnableDCache() function takes a lot of time running . So when i stepped into the SCB_EnableDCache() function i found that it is working and decrementing its values but i didn't know why it takes a lot of time when debugging ?

Oussama_Baklouti · ‎2024-08-20

I also tried debugging and i waited the SCB_EnableDCache() a long time and it worked .

SofLit · ‎2024-08-21

So when i stepped into the SCB_EnableDCache() function i found that it is working and decrementing its values but i didn't know why it takes a lot of time when debugging ?

Why are you stepping into SCB_EnableDCache()?

When you are in standalone mode (not in debug) are the two applications (toggling the LED and TouchGFX) are running without any stuck?

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Oussama_Baklouti · ‎2024-08-21

Yes,the two applications (toggling the LED and TouchGFX) are running without any stuck .
but in the first project i send to you there a LIN code to send a frame that didin't work .
That's the main issue

SofLit · ‎2024-08-21

You didn't answer my question: Why are you stepping into SCB_EnableDCache()? There is no need for that. You need just to step over it (F6) not into it. And as I said your project is working well from my side.

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Oussama_Baklouti · ‎2024-08-21

When i step over it , it takes a lot of time running so i stepped into it to see what is the problem .