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Altera_Forum's avatar
Altera_Forum
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16 years ago

SD over spi?? Help

I am trying to run an sd card using the spi mode I followed the instructions in the wiki during boot here is what i get

...

mmc_spi spi2.0: ASSUMING SPI bus stays unshared!

mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power

mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff

...

but when I try to moun it

/> mount -t vfat /dev/mmcblk0p1 /mnt

mount: mounting /dev/mmcblk0p1 on /mnt failed: No such device or address

anything I am missing threre is no other items displayed during boot.

the card is installed.

hmmmm

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    We use the following configuration in menuconfig: 

    Device Drivers  --->  SPI support  --->    Altera SPI Controller 
Device Drivers  --->  MMC/SD card support --->  MMC/SD over SPI
File systems --->  Ext3 journalling file system support
File systems ---> DOS/FAT/NT Filesystems --->  VFAT (Windows-95) fs support
File systems ---> -*- Native language support --->  Codepage 437 (United States, Canada)
File systems ---> -*- Native language support --->  NLS ISO 8859-1 (Latin 1; Western European Languages)

    And this is what we see on initialization: 

    ...
mmc_spi spi2.0: ASSUMING SPI bus stays unshared!
mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power
mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff
...
mmc0: host does not support reading read-only switch. assuming write-enable.
mmc0: new SD card on SPI
mmcblk0: mmc0:0000 SA01G 972 MiB
 mmcblk0: p1
...

    And then inside the etc/rc script the following command:

    mount -t vfat /dev/mmcblk0p1 /sd

    Are you doing anything different from the above?

    Cheers,

    Ricardo.