Can't flash STM32H7B3I-EVAL Hex Demo Code

[vijayajangam]

Hello,

I am using the STM32H7B3I-EVAL board with STM32H7B3LIH6Q controller.

The board revision I am using is MB1370-lcd-b02 a254300030.

I downloaded the official demo package from the ST website:
STM32H7B3I-EVAL → Tools & Software → Demo Code Package.

After extracting the ZIP file, I tried flashing the provided  .hex demo file into the controller using STM32CubeProgrammer.

However, programming fails with the following errors:

• Error: failed to download Sector[0]

• Error: failed to download the File

The board is detected correctly through ST-LINK, and connection is successful. I already tried:

• Reducing SWD frequency

• Full chip erase

• Hardware reset / Under reset mode

But the issue still occurs.

Could anyone please suggest:

1. Whether the provided demo .hex file is directly compatible with STM32H7B3LIH6Q?

2. If any special option bytes or external memory configuration is required?

3. Whether the demo depends on external QSPI/OSPI memory or specific boot settings?

Thank you.

[MOBEJ · Accepted solution]

Hello @vijayajangam ,

This demo requires an external QSPI memory to be present and properly initialized.
For the STM32H7B3I-EVAL board, please use the correct OSPI flasher:

MX25LM51245G_STM32H7B3I-EVAL

To program the board, open STM32CubeProgrammer, go to External loaders, and select the QSPI/external loader matching your board configuration, as shown in your screenshot.

Once the correct external loader is selected, you should be able to flash and run the demo properly.

Br

[vijayajangam]

Hello,

I am using the STM32H7B3I-EVAL board with STM32H7B3LIH6Q controller.

I downloaded and flashed the official demo HEX files from the STM32H7B3I-EVAL package provided on the ST website. Programming is now successful, but I am facing an issue with the TFT display.

Problem:

• TFT backlight turns ON
• No graphics, logo, GUI, or display output appears on screen
• Screen remains blank/black
• In some demo files (for example: STemWin-STM32H7B3I-EVAL_V1.0.1.hex), all 4 user LEDs              PG13(1) LED1
    MFX IO11 LED2
    MFX IO12 LED3
    MFX IO13 LED4  turn ON after boot

I already checked:

• TFT ribbon/cable connection
• Successful flashing through STM32CubeProgrammer
• Multiple demo HEX files from the package
• Power supply and ST-LINK connection

Still, nothing is displayed on TFT.

Could anyone please suggest:

1. Whether external memory (OSPI/QSPI SDRAM) initialization may be failing?
2. Whether this issue is related to LTDC/display clock configuration?
3. Whether all 4 LEDs ON indicates a BSP/display initialization failure?
4. Whether any specific boot switch or hardware revision dependency exists for these demo HEX files?

Thank you.

[MOBEJ]

Hello @vijayajangam , 

To help identify the issue more accurately, could you please provide:

1. The board revision
2. The LCD revision

These details are important because different hardware revisions may behave differently.

For example, in the screenshot:

• LCD daughterboard: MB1370 B01 — shown in the red rectangle
• Main board: MB1331 H7B3LIQ-D03 — shown in the yellow rectangle
  You can also find this information on the back side of the board

If you can share both revisions, we will be able to investigate the issue more effectively.

Thank you.
Br

[vijayajangam]

These details are of Board

• LCD daughterboard: MB1370-LCD-B02 — shown in the red rectangle
• Main board: MB1331 H7B3LIQ-D04 — shown in the yellow rectangle

Thank you

Vijaya.

[MOBEJ]

Hello @vijayajangam , 

Thank you  for sharing the photos.

After checking the board information in UM2662, it appears that there has been a revision change in the LCD daughterboard. In the newer revision, both the LCD driver and the touch screen have changed.

This means that the first demo you tried is compatible only with the previous revision of the STM32H7B3I-EVAL board. For the new revision, the BSP has been updated accordingly.

We are currently preparing the corresponding demo update, and it will be published on ST.com ASAP for this new board revision.

For reference, please see the board revision history and product history sections in the user manual, where this change is documented:

• MB1370 LCD daughterboard revision change: LCD-B01 → LCD-B02
• STM32H7B3I-EVAL product update reflecting the new board revision

Please check the screenshots below in the user manual for more details.

Thank you , 
Br