STM32U5 + ST2525R3916B

[biopunk101]

I am currently using STM32U5 + ST25R3196B with STM32CubeMX and X-CUBE-NFC6.

The program is based on the documentation from X-CUBE-NFC6.

Previously, I tested the example on the STM32F4 series, and it worked correctly. However, after migrating to STM32U5, the program does not function as expected.

After tracing, I found that execution stops at the following segment:

 

Additionally, "BSP_NFC0XCOMM_IRQ_Callback()" is not triggered as expected.

I am aware that EXTI configurations differ between STM32U5 and STM32F4, so I modified the settings as follows:

 

The SPI initialization appears to be correct, but the issue persists. Could you help check if there are any potential issues? Thank you.

[Ulysses HERNIOSUS]

Hi biopunk101,

which NUCLEO board are you using? To which pins are the button and the IRQ of ST25R3916 connected. I propose you inspect which settings are currently applied on your project vs the actual HW connection.

I find integrate-nfc08a1-expansion-board-with-stm32-u575zi-q which addresses at least the user button problem.

BR, Ulysses

[Andrew Neil]

Please see How to insert source code - not as images.

 

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@biopunk101 wrote:

After tracing, I found that execution stops at the following segment:

---

Where, exactly, in that segment?

This line:

That's waiting for the pin to go high - so have you checked (eg, with a voltmeter) if the pin ever does go high?

[biopunk101]

 

Thanks for your reply and reminder.

Now, I understand that the button configuration on STM32U5 and F4 is different. I am using the  NUCLEO-U545 to test.

I also referred to the NUCLEO-L476RG, where the interrupt (INT) is connected to PA0, and I believe it should be the same for NUCLEO-U545.

However, the ISR is still not working. My current settings are as follows:

 

Is there anything else I need to check or modify? Any suggestions would be greatly appreciated.

[biopunk101]

Thank you all for your replies.

I have confirmed that the issue was due to an incorrect CS pin configuration. The NUCLEO-L476 and NUCLEO-U545 actually have differences in their pin assignments.

Below is the correct configuration, which can be used for NUCLEO-U545 + ST25R3916B (X-NUCLEO-NFC08A1).

 

[Andrew Neil]

If that's answered your question, please mark the solution:

https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256