Able to program GPIO_EXTI example but the board doesnt responds

[RafaelS]

Hello,

I am new to STM MCUs and need to test the different peripherals of the STM32H745 to decide if it fits my project. I began with the GPIO_EXTI example, and it worked. Later, I tried to configure a USART for debugging purposes, but it didn’t work. After several days of trying, I reprogrammed the GPIO_EXTI example, but to my surprise, the LEDs no longer toggle when I press the user button.

I have tried programming the ELF file using both STM32CubeIDE and STM32CubeProgrammer (after performing a full chip erase). In both cases, the programming process completes without errors.

I have no idea why this is happening. Does anyone have any advice, please?

Thank you very much.

PS. I use the STM32H745I-DISCO board

[RafaelS]

Sorry I am new in this enviroment and I am not sure...

How can I verify in wich mode is running?

[SofLit]

I mean stop the debug session and don't run the example from button 3 in your previous screen shot.

Just upload the program of CM4 and CM7 the debug session with this button:

Then reset the board or simply disconnect and reconnect the STLINK cable.

[RafaelS]

Ok, I understand.

I have clicked on

and after I have clicked on stop button for both cores. I have disconnect and reconnect the STLINK cable.

The LD1 does not blink

[SofLit]

That's really strange:

Are you sure what you are seeing is one of these LEDs (in the red rectangle) is not toggling ?

[RafaelS]

Unfortunately, I don't see any LED toggling in these rectangle...

[RafaelS]

I am going to try a Demonstration to see it run or not. May be it will give any clue

[RafaelS]

Hello,

I have download these file: https://www.st.com/resource/en/compiled_demos/stm32h745i-disco_demo.zip 

and I have launch "program_hexfile.bat" with the following output

But the screen does not show anything, only a white screen...

I wonder if the board is broken. It is strange to be able to program it without error.

Is it posible that the core is OK but the periferics are boken?

[SofLit]

It's hard to tell you what happened and what is going on..

Try to run a very simple example without using any external resources (GPIOs etc ..) example an algorithm like BubbleSort: https://www.geeksforgeeks.org/bubble-sort-algorithm/

Make a full erase of the Flash using CubeProgrammer and upload/Run this algorithm on CM7. Run it in debug and see if the algorithm is running well (sorting the values correctly).

Do the same thing on CM4.

[SofLit]

One thing, did you modify the option bytes? especially the boot options?

[RafaelS]

Hello,

I will try the algorithm BubbleSort as soon as possible, thanks.

I have not modified the option bytes. I attach a picture

Thanks