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ok, now it's officialy closed!
I just needed to format my sd card using mkfs.vfat command
or through windows :S
anyway, thanks for all your help and support! :D
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Don't close yet, I have a question on mouting the SD card too. I am sorry that I use ColdFire but seems people here are familiar with uClinux.
I can't even see anything that the system is probing the sd card. I use QSPI from the coldfire and I choosed the MMC/SD/SDIO and used the MMC over spi. I can see the block devices in dev, but can't mount them with "mounting /dev/mmcblk0p1 on /mnt/sd failed: no such device or address" message. Whatelse do you need for the os to probe sd card on spi when boot?
Some one mentioned modprobe, how to configure that into uClinux?
It seems that I need to change some source files in C to let the kernel probe the SD card using spi, right? Thanks!