SD Card SPI + MFS?

[EDesigns]

Hello,

I'm using the M52259EVB evaluation board and am successfully initializing a microSDHC card with SPI.

Is it possible to use the MFS driver to read the FAT32 file system contents of the SD card?

I'm trying to open the device that I will be installing the MFS onto but it keeps crashing when i call

     fopen("spi0:", 0)

[PetrL]

Hi,

the code is crashing because you spi driver is not prepared cooperate with MFS directly. However you can use SD card driver for this task.

See SDCARD example in "C:\Program Files\Freescale\Freescale MQX 3.6\mfs\examples\sdcard" and SD card documentation in IO Guide "C:\Program Files\Freescale\Freescale MQX 3.6\doc\mqx\MQXIOUG.pdf" .

If you port the example to your system you should be able to access FAT32 on SD card.

Regards,

Petr

[EDesigns]

I've attempted to port the code over and I'm still encountering the same problem as I was before.

It keeps crashing on this line:

               sdcard_handle = fopen("sdcard:", 0);

I'm kind of confused on where sdcard: is coming from. Should it be spi0: ?

[PetrM · Accepted solution]

Hello,

you need to have a look at BSP of one of the boards, that already supports SDCARD driver, like twrmcf52259 (same processor). There are several files/declarations/initializations that need to be added to m52259evb's BSP - sdcard/sdcard_spi driver, init_sdcard0.c etc.

PetrM

[EDesigns]

Thank you PetrM! I was able to port it over rather easily and succesfully!

[EDesigns]

PetrL,

Thank you for your response. I did look at those SDCard examples and the section in the I/O user guide. However, the SD Card drivers are not compatible with the 52259EVB evaluation board.

I am having troubles porting it over because the _io_sdcard_install function uses _io_dev_install_ext which uses the SD card functions that are not SPI.