Hello! I am using MIFARE Classic example with RC663 reader to understand the functionality. The sample code I have downloaded from NXP site is running fine with FreeRTOS library, but when tried to run the same code using NULL OS is not working.

[sameerhuddar]

Can anyone guide or assist regarding using NULL OS for Mifare Classic example?

[Kan_Li]

Hi Sameer,

Please modify ph_NxpBuild_App.h and use #define NXPBUILD__PH_OSAL_NULLOS in stead.

Please kindly refer to the following for more details.

Wish it helps.

Have a great day,
Kan Li
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[sameerhuddar]

Just FYI, my main objective is to use this mifare classic example project as reference for implementing it as small module inside 'main' application that is also doing other tasks like controlling temperature and displaying information etc. but without any rtos. Also,the main application is developed on Uvision Keil and controller is LPC1769.

If you could guide on this, It will be very much helpful.

With Regards,

Sameer

[sameerhuddar]

Dear Kan Li,

Thank you for your support, I have tried that earlier by modifying ph_NxpBuild_App.h but, while running the application in debug mode,a message "stalled on bus operation" is being generated on bottom left side of the IDE. For debugging, I had written statements through DEBUG_PRINTF inside 'RF_IRQ_Handler' function defined in "ph_Platform.c" file, the interrupt is executing only once and then that message(stalled on bus operation) is generated.

While using FreeRtos, interrupt handler function and discovery loop are running simultaneously. Is it related to memory allocation or related to this statement 'RdLib executed in Executive Loop' as I did not understand this statement?

I hope I have tried to explain the issue clearly.

[Kan_Li · Accepted solution]

Hi Sameer,

It is not recommended putting printf() function in an interrupt service, because there is very small time slot allowed for an IRQ handler，while printf() consumes too much time and it might cause some issue out of application spec. and as a rule of thumb, we put printf() in main loop instead. so please try remove the DEBUG_PRINTF inside 'RF_IRQ_Handler' function and check if the problem is still there.

Hope that helps,

Have a great day!

Kan

[sameerhuddar]

Hi Kan_Li,

Yes, as suggested I had already removed it and in the mean time was also able to run the same application as independent module without FreeRtos and Null OS API.

Thanks and Regards,

Sameer Huddar