i.MX ProcessorsのトピックSDMMC_OSADelay() not working properly

SDMMC_OSADelay() not working properly

angelo_76 — Thu, 19 Oct 2023 12:38:06 GMT

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.

Re: SDMMC_OSADelay() not working properly

diego_charles — Tue, 24 Oct 2023 17:05:20 GMT

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

Re: SDMMC_OSADelay() not working properly

angelo_76 — Tue, 24 Oct 2023 18:42:30 GMT

Hi @diego_charles !

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

Re: SDMMC_OSADelay() not working properly

diego_charles — Tue, 24 Oct 2023 23:53:59 GMT

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