SDMMC_OSADelay() not working properly

[angelo_76]

Hi all!

We are working on a project based on IMXRT1050 – EVKB where fatfs is implemented using SDcard, according to NXP example.

We are facing a stranger behavior regarding SDMMC_OSADelay() function, when instead delay milliseconds, it take several minutes.
The stranger thing is when this happens. The fact to add or remove some code from anywhere from software, causes the SDMMC_OSADelay() to work well or not.

Example when everything works fine, including Sdcard:

Hw_and_sw_initialization();
SD_PollingCardInsert();
Foo_func(); //this function just return 1.

Example when SDMMC_OSADelay() take minutes:

Hw_and_sw_initialization();
SD_PollingCardInsert(); // software get stuck here for several minutes, and when continue, SDcard is not working.
//Foo_func(); //this function just return 1.

Any help will be welcome!

Best regards,

Angelo.

[diego_charles]

Hi @angelo_76 

I hope you are doing fine.

Please, try to increase the heap area for your RTOS application. Let's check if this has an effect on the behaviour of this function. 

All the best,

Diego

[angelo_76]

Hi @diego_charles !

Thanks for the response, but in this case, I'm running on bare metal.

[diego_charles · Accepted solution]

Hi @angelo_76 

Thanks for the clarification!  I see that you are using the baremetal implementation relying on the SDK_DelayAtLeastUs

Please help me testing  DWT and check  if the delay given to this function is not too big, try  a smaller value. 

Below an example screenshot using RT1064 and MCUXpresso. 

Best regards,

Diego