TouchGFX 4.24.2 on STM32N6570-DK: Black Screen and Red LED (LD4) After Flashing

[Ippo]

Hi everyone,
I’m encountering an issue while working with TouchGFX 4.24.2 on the STM32N6570-DK, using STM32CubeIDE 1.17.

Here’s the situation:

• I tested both my custom project and a demo project provided by TouchGFX.
• I followed the recommended steps:
  1. Generate Code in TouchGFX Designer.
  2. Run the application in the TouchGFX simulator, where it executes without any issues.
  3. Build and flash the project onto the board using STM32CubeIDE.

However, after flashing, the board:

• Shows a black screen (no content displayed).
• The LD4 LED remains lit in red.

I verified the following:

• The BOOT switches were in the correct positions during flashing and execution.
• I used the correct flash scripts for the FSBL and application.

Despite these steps, the application refuses to run on the board. Even the demo projects, which should work out of the box, show the same behavior.

Has anyone experienced this issue or found a solution? Could it be related to memory configuration, the FSBL, or perhaps some compatibility issue with the board? Any help or troubleshooting suggestions would be highly appreciated!

Thank you for your support! :smiling_face_with_smiling_eyes:

[Osman SOYKURT]

Hello @Ippo ,

Which version of STM32CubeProgrammer are you using? You must use the latest one in date (2.18.0) since STM32N6570-DK is supported from that version as described in the Release Note.

[Ippo]

The latest version is 2.18, but I tried flashing using CubeIDE 1.17. The problem is that when I try to flash a demo to the N6 after generating the code with TouchGFX and building the application code with CubeIDE, the code compiles without errors, but the screen remains black.

Maybe I did something wrong.

[Osman SOYKURT · Accepted solution]

The flashing should be exclusively done using the .bat scripts provided in the Flash Scripts/ folder. 

---

@Ippo wrote:

• I followed the recommended steps:
  1. Generate Code in TouchGFX Designer.
  2. Run the application in the TouchGFX simulator, where it executes without any issues.
  3. Build and flash the project onto the board using STM32CubeIDE.

---

We do not recommend number 3. You shouldn't try to flash using STM32CubeIDE because it will not work. 

[Ippo]

Thanks for the help. I'll update you if it works or not as soon as I can.

[Ippo]

I tried to execute the script inside the Flash scripts folder, but when I run LoadAll.bat, I get the error 'failed to erase memory'. I generated the .hex and .bin files by building the project in CubeIDE.

I positioned the BOOT1 switch to the right before executing the script.

Maybe I did something wrong. Do you have any suggestions?

  

[paulbamburak]

I am working to solve the same problem - where do I find the Flash Scripts?

[Ippo]

Hi,

Flash scripts are located inside the "Flash scripts" folder within the project directory. For example, if the project application is in "C:\TouchGFXProjects\MyApplication_1", the flash scripts can be found in "C:\TouchGFXProjects\MyApplication_1\Flash scripts\CubeIde\Debug(or Release)\ .bat scripts".

Inside the Debug or Release folder, there are batch (.bat) scripts available for flashing. The commonly used script is LoadAll.bat.

Before running the script, Boot0 and Boot1 switches must be set to the correct positions. Once properly configured, execute LoadAll.bat to start the flashing process.

After the flash is completed, set Boot0 and Boot1 back to their default positions, then press the reset button to restart the board.