Endless Loop when running SCB_EnableDCache()

[Oussama_Baklouti]

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 

[mƎALLEm]

Hello @Oussama_Baklouti and welcome to the community.

Where did you call SCB_EnableDCache()? before MPU config? if yes, need to move the call after the MPU config.

Could you please share your code?  you attached a rar containing only .cprojet file!

Please attach your complete projet.

[TDK]

> MPU config is called before SCB_EnableDCache

So move it afterwards as @mƎALLEm suggested.

[mƎALLEm]

Thank you for sharing your project but I didn't reproduce the issue and the application passed SCB_EnableDCache() step and I see this screen (stepped over SCB_EnableDCache():(

Your project is running well in debug and in standalone.

Try maybe to use the latest tools CubeMx/CubeIDE and clean/rebuild your project.

 

[Oussama_Baklouti]

Does the frame was sent ?

 

 

[mƎALLEm]

Which frame?

Your problem was: "when debugging i found that the code blocked in an endless loop in SCB_EnableDCache() function"

So the issue was that your application was not even passing the first two lines in the main.

Did you already solve that issue or not? or it's a new one? if yes please close that thread and create a new one with a new description.

[Oussama_Baklouti]

The problem isn't solved ,the code blocked in an endless loop in SCB_EnableDCache() function .And while debugging this is what happen 

[Oussama_Baklouti]

Yes , i'm using the latest version of CubeMx/CubeIDE.
Could the problem be in the board ?

 

[mƎALLEm]

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?

[Oussama_Baklouti]

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 

[Oussama_Baklouti]

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 ?

 

[mƎALLEm]

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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 ?

 

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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?

[Oussama_Baklouti]

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 

 

[mƎALLEm]

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.

 

[Oussama_Baklouti]

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

[mƎALLEm]

I didn't reproduce your behavior from my side by stepping over SCB_EnableDCache(). Do you have another board to do the same test?

 

[Oussama_Baklouti]

No i don't But like i said toggling the led and TouchGFX are working fine .
But toggling the led didn't work unless i created a task and not in the while loop 

[Oussama_Baklouti]

There is no data sent from the touchGFX .But when i used the stlink port to send it worked but when i use the Arduino connectors TX/RX it didn't work 

 

[mƎALLEm]

This is a TouchGFX issue not related to the original question "endless loop in SCB_EnableDCache()".

You already created this new thread regarding this question: https://community.st.com/t5/stm32-mcus-touchgfx-and-gui/problem-while-sending-a-lin-frame-from-touchgfx/td-p/711283