Interfacing ST25R3911B with STM32F072 using FreeRTOS

[Neo M]

I am trying to interface ST25R3911B to an existing application that runs FreeRTOS. Is there any sample code available for ST25R3911B in a FreeRTOS setup?

I added RFAL to my project, created platform.h, with a mutex for platformProtectST25R391xComm. I am trying to read a ISP-15693 tag.

I am using rfalNfcvPollerCollisionResolution( RFAL_COMPLIANCE_MODE_NFC, 1, testNfcVdev, &testDevCnt) to get tag info.

I am pretty sure I am messing up calling the ISR from the IRQ callback. What is the best way to service the interrupt in a FreeRTOS environment?

[Grégoire Poulain]

Hi Neo,

Yes, we have a sample project to interface with the ST25R3911B based on FreeRTOS.

At the moment this package has not been officially published.

The setup we have used is:

• Thread(s) for application tasks with Normal priority
• An NFC Thread with High priority to execute the ST25R3911B ISR and the RFAL worker/process
  • This thread makes use of the FreeRTOS Task Notification APIs and waits to be notified from the ISR - ulTaskNotifyTake()
• ST25R3911B ISR
  • Notifies the NFC Thread to be executed - vTaskNotifyGiveFromISR()
  • Requests a context switch as soon as possible - portYIELD_FROM_ISR()

Kind regards

GP

[AlexeyR]

Gregoire,

Any news on this package?

Also, besides the setup that you've detailed above, should we expect any changes to the RFAL library or the ST25R3911B support files?

Thank you!

[Neo M]

Thanks Gregoire. I have a similar setup. Is it possible to get the sample code before it is published?

[Grégoire Poulain]

Hi Neo,

I have contacted you via PM.

Please look into your Inbox.

Best regards

GP

[Neo M]

Thank you.

[JMart.18]

Dear all,

Do you know if this sample code is available?

I have an issue whit my application code and I think the solution is this set up.

When I have more than one freertos task, at some moment NFC remains in rfalTransceiveRunBlockingTx loop forever.

Thank you all.

[Ulysses HERNIOSUS]

Hi JMart.18,

STSW-ST25R016 contains a FreeRTOS example. This example is for ST25R3916 + STM32L4 but could also be transferred to your setup.

Please beware that ST25R3911B has some more real-time requirements compared to ST25R3916 (e.g. FIFO of 96 bytes which may not be enough to cope with all NFC frames unless you limit the application or guarantee filling/emptying the FIFO in-time.)

Best Regards, Ulysses

[JMart.18]

Dear Ulysses,

Thank you for the information.

Best Regards

[Brian TIDAL]

Hi

I would suggest to creat a new Thread rather than adding a new post to a solved 2019 thread.

A freeRTOS demo is provided in the STSW-ST25R-LIB (ST25 embedded NFC library) for ST25R3916. I would suggest to use this one and to port it to the ST25R3911B.

Rgds

BT

[SScar.2]

Hi Brian, 

Ok, if the implementation you suggest has some issues (which @Ulysses HERNIOSUS suggested a long time ago) then I'll open a new thread. 

Thanks for your time

Simone