Read Data From SD-CARD

hello

I am new to SDK environment , and i am working on zedboard(Z7020).
i want to read data from SD-CARD and display it on tera term using SDK.
Can someone help me in this part.

thanks in advance.
prakhar

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0 zedhed over 9 years ago

Hi prakhar,

You are going to get the best results with the SD access by using some sort of OS or even U-Boot.

If you just want to try it out to see it work, there is a xilffs_polled_example.c file in the following directory which might work for what you want:

C:XilinxSDK2015.4dataembeddedswlibsw_servicesxilffs_v3_1examples

If you intend to move toward writing the SD card, please check out these other threads ahead of time and understand the issues related to writing:

http://zedboard.org/content/sd-card-example-design-using-standalone

http://zedboard.org/content/standalone-sd-card-sdio

Regards,

-Kevin
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0 Former Member over 9 years ago in reply to zedhed

Hi Kevin

thanks for your reply .
I have tried that example
and every time i do so i get error as FR_NOT_READY.
this error corresponds to
"The storage device cannot work due to a failure of disk_initialize function due to no medium or any other reason."
i have tried this example with 2 different SD CARDS and i am getting the same results.
Please help me with this issue .

Thanks in advance
Prakhar
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0 the00772000 over 8 years ago in reply to Former Member

Hello

I want to ask you how to solve the error: "FR_NOT_READY"??
I try Xilinx\SDK\2016.1\data\embeddedsw\lib\sw_services\xilffs_v3_2\examples\xilffs_polled_example.c, too, and get the same error.

Thanks in advance.
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0 jafoste4 over 8 years ago in reply to the00772000

Hello,
Here is a good place to start looking.
https://forums.xilinx.com/t5/forums/searchpage/tab/message?q=FR_NOT_READY
--Josh
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0 jafoste4 over 8 years ago in reply to the00772000

Hello,
Here is a good place to start looking.
https://forums.xilinx.com/t5/forums/searchpage/tab/message?q=FR_NOT_READY
--Josh
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0 the00772000 over 8 years ago in reply to jafoste4

Hi
I have visited this place, but it seems useless.
When SDK run to the code "XSdPs_SdCardInitialize", it just stop, and console appears nothings.
When SDK run to the code"disk_initialize", return 3.

https://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/p/462176/1660114

This article propose that
" When the FatFs functions call disk_initialize() and receive a return value of STA_NOINIT, those functions will in turn return FR_NOT_READY to their calling functions."
Do you have any idea?

Thanks for your reply.
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