SDIO for Windows 7

Good morning from Germany,
I would like to know wheter if there is any library / API for SDIO device on Zynq. We are developing a Bare Metal Software which has to log some data on SD card, through SDIO interface.
Thank you in advance,
Michel

0 Former Member over 12 years ago

Hi

I have not done anything with SDIO, but have made a fully working bare metal Vivado project that allows you to work with an SD card in SPI mode. It uses the 'FatFs' libraries available here -
http://elm-chan.org/fsw/ff/00index_e.html

Enabling GPIO in the PS block, you can then communicate through MIO pins 40-47, which are the pins in the SD slot on the Zedboard. (I am sure this is not the best way to do this, but it works!)

I made the modifications to the 'generic' version of the FatFs library and have stuck the C files here so you can have a look
http://personal.strath.ac.uk/kenneth.barlee/zed_posts/fatfs_sd.zip

Kenny
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0 Former Member over 12 years ago

Hi, Kenny.

It's great!!
Does "Enabling GPIO" means that pin40-47 should be GPIO not SD0?
I will try.

Thank you.
Sam
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0 Former Member over 12 years ago

Hi, Kenny.

It's working!!
Thank you for your idea!!

sam
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0 Former Member over 12 years ago in reply to Former Member

...haha - glad I could help!
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0 Former Member over 12 years ago in reply to Former Member

For anyone else reading this - yes, set the MIO pins 40-47 to be GPIO

K
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0 Former Member over 12 years ago

HI, Kenny.

Could this library create a binary file and write in binary format?

Sean
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0 Former Member over 12 years ago in reply to Former Member

Hi Sean,

Yes I am sure it probably could. If you look at the main.c file though, you will see that functions have been created that allow for files + folders to be created, and char strings to be written to them.

If you are wanting to log binary values to a file I would suggest something along the lines of

//stackoverflow.com/questions/111928/is-there-a-printf-converter-to-print-in-binary-format
const char *byte_to_binary(unsigned long x)
{
tstatic char binary[32];
tbinary[0]='0';
tint z;
tfor (z = 134217728; z > 0; z >>= 1)
t{
ttstrcat(binary,((x & z) == z)?"1":"0");
t}
treturn binary;
}

void main(void)
{
....

t//BINARY VALUE
tint bin = 0b010101010101;

t//CREATE NEW FILE
tprintf("
create a new file (binary.txt)");
trc = f_open(&Fil, "BINARY.TXT", FA_WRITE | FA_CREATE_ALWAYS);
tif (rc) die(rc);

t//WRITE TO NEW FILE
tprintf("
write binary data");
tchar buffer[33];
tsprintf(buffer,"%s
",byte_to_binary(bin));
trc = f_write(&Fil, *buffer, strlen(buffer), &bw);
tif (rc) die(rc);

t//CLOSE NEW FILE
tprintf("
close the file");
trc = f_close(&Fil);
tif (rc) die(rc);

t...
}
(note - not tested!)

...rather than writing binary commands. If you want to do that though, I guess you would have to manipulate some of the files in the background. Have not done it myself so could not comment!

Kenny
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0 Former Member over 12 years ago in reply to Former Member

HI, Kenny.

It does work! Thank you for answering!

Sean
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0 ttkee over 7 years ago

Hi
I am getting this error 10 = FR_WRITE_PROTECTED = The physical drive is write when everytime I run the application.
I used diskpart to to disable write protection, but I still get the same error.
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