topic Re: Emmc interface failed in i.MX RT Crossover MCUs

Emmc interface failed

vasudhevan — Mon, 02 Nov 2020 14:30:54 GMT

Hi,

I imported evkmimxrt1064_sdcard_fatfs_freertos example code.

If i connect sd card working fine.

If i connect emmc to sd converter evk board i am getting error.

SDCARD fatfs freertos example.

Card inserted.

Make file system......The time may be long if the card capacity is big.
Make file system failed.‍‍‍‍‍‍

Why i am getting error ?

How to solve the issue ?

Thanks & Regards,

Vasu

Re: Emmc interface failed

kerryzhou — Thu, 05 Mar 2020 09:37:46 GMT

Hi Vasudhevan G ,

Do you test the sdcard polling code?

SDK_2.7.0_EVK-MIMXRT1064\boards\evkmimxrt1064\sdmmc_examples\sdcard_polling

Just check whether the emmc card detect, write and erase have problems or not at first.

Kerry

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Re: Emmc interface failed

vasudhevan — Thu, 05 Mar 2020 11:06:15 GMT

Hi Kerry,

I imported sdcard_polling example code.

        /* card information log */
        CardInformationLog(card);‍‍

This line code is blocked.

If i pause the debugger fsl_usdhc.c line is no 714 while function blocking.

Debug Log:

SDCARD polling example.

Please insert a card into board.

Card inserted.

SDCARD polling example.

Please insert a card into board.

Card inserted.‍‍‍‍‍‍‍‍‍‍‍

Thanks & Regards

Vasu

Re: Emmc interface failed

kerryzhou — Fri, 06 Mar 2020 07:45:39 GMT

Hi Vasudhevan G,

Do you mean when you comment the following line?

Then you can detect the card?

Could you tell me your card capacity size? Do you test your emmc card with other host? whether it can be detected or not? Just make sure this card has no problem.

Kerry

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Re: Emmc interface failed

vasudhevan — Fri, 06 Mar 2020 08:33:44 GMT

Hi Kerry,

Do you mean when you comment the following line?

Nothing i changed if pause debugger blocking here only.

Then you can detect the card?

No it's not detecting.

Could you tell me your card capacity size?

16GB FORESEE emmc card.

Do you test your emmc card with other host?

I checked with ubuntu pc and linux boards detecting fine.

Thanks & Regards

Vasu

Re: Emmc interface failed

kerryzhou — Mon, 02 Nov 2020 14:30:56 GMT

Hi Vasudhevan G,

I checked the normal SD code log, it like this:

SDCARD polling example.

Please insert a card into board.

Card inserted.

Card size 3911680 * 512 bytes

Working condition:

  Voltage : 3.3V

  Timing mode: High Speed

  Freq : 49500000 HZ

Read/Write/Erase the card continuously until encounter error......

Write/read one data block......
Compare the read/write content......
The read/write content is consistent.
Write/read multiple data blocks......
Compare the read/write content......
The read/write content is consistent.
Erase multiple data blocks......

Input 'q' to quit read/write/erase process.                
Input other char to read/write/erase data blocks again.‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

After printf the card insterted, it will initialize the sd card, you emmc capacity size is large, so it may need more time.

So, do you wait a long time, any progress?

Please also put an breakpoint in :

When debug it, for the long time, whether the breakpoint can be enter or not?

I want to know your sd_cardInit is OK or not.

Kerry

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Re: Emmc interface failed

vasudhevan — Fri, 06 Mar 2020 12:20:52 GMT

Hi Kerry,

SD card working fine.

Issue in emmc.

SDCARD polling example.

Please insert a card into board.

Card inserted.

Card size 31116288 * 512 bytes

Working condition:

  Voltage : 1.8V

  Timing mode: SDR104

  Freq : 198000000 HZ

Read/Write/Erase the card continuously until encounter error......

Write/read one data block......
Compare the read/write content......
The read/write content is consistent.
Write/read multiple data blocks......
Compare the read/write content......
The read/write content is consistent.
Erase multiple data blocks......

Input 'q' to quit read/write/erase process.                
Input other char to read/write/erase data blocks again.‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

How to solve issue in emmc ?

Based on this only we need to design our custom hardware.

Re: Emmc interface failed

kerryzhou — Mon, 09 Mar 2020 07:17:34 GMT

Hi Vasudhevan G,

How long when you use the 16G SD card to detect it and printf the card size?

When you use the emmc, and set the breakpoint under CardInformationLog(card); whether the breakpoint can stop or not? Just check whether SD_CardInit can be finished or not?

What's your emmc version?

Kerry

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