[新手指導(dǎo)]imx6開(kāi)發(fā)板 SDHC/SDXC/MMC卡驅(qū)動(dòng)測(cè)試
imx6開(kāi)發(fā)板 SDHC/SDXC/MMC卡驅(qū)動(dòng)測(cè)試
以下操作基于飛凌嵌入式imx6開(kāi)發(fā)板
命令行測(cè)試法
imx6開(kāi)發(fā)板支持SD卡熱插拔。插上SD卡后系統(tǒng)會(huì)自動(dòng)將其掛載到/media目錄。同時(shí)終端會(huì)打印關(guān)于SD卡的信息，由于存在很多種卡，顯示的信息可能會(huì)有差別：
root@freescale ~$ mmc2: new high speed SDHC card at address aaaa
mmcblk1: mmc2:aaaa SS08G 7.40 GiB
mmcblk1: p1
mmcblk1: p1 p2
EXT3-fs: barriers not enabled
kjournald starting. Commit interval 5 seconds
EXT3-fs (mmcblk1p2): using internal journal
EXT3-fs (mmcblk1p2): recovery complete
EXT3-fs (mmcblk1p2): mounted filesystem with writeback data mode
掛載普通8G SD卡
root@freescale /$ ls /media
mmcblk0p1 mmcblk1p1 mmcblk1p2
查看SD卡中的文件,命令如下：
root@freescale /media$ ls -l /media/mmcblk1p1/
drwxr-xr-x 2 root root 4096 May 22 2015 ??
drwxr-xr-x 2 root root 4096 Nov 23 2014 LOST.DIR
-rwxr-xr-x 1 root root 22612 Jan 15 2015 MLO
-rwxr-xr-x 1 root root 3236 Jan 15 2015 app
drwxr-xr-x 2 root root 4096 May 15 2015 ok335-s
root@freescale /media$ ls -l /media/mmcblk1p2/
drwxr-sr-x 2 root root 4096 Sep 22 2013 bin
drwxr-sr-x 2 root root 4096 Apr 5 2013 dev
drwxr-sr-x 26 root root 4096 Jan 13 2015 etc
drwxr-sr-x 7 root root 4096 Jun 16 2014 forlinx
drwxr-sr-x 4 root root 4096 May 20 2014 home
drwxr-sr-x 8 root root 4096 May 20 2014 lib
drwxr-sr-x 13 root root 4096 Jan 13 2015 media
drwxr-sr-x 3 root root 4096 Apr 5 2013 mnt
drwxr-xr-x 3 root root 4096 May 21 2014 opt
drwxr-sr-x 2 root root 4096 Apr 5 2013 proc
drwxr-sr-x 2 root root 4096 May 20 2014 sbin
drwxr-sr-x 2 root root 4096 Jan 2 2014 srv
drwxr-sr-x 2 root root 4096 Apr 5 2013 sys
lrwxrwxrwx 1 root root 8 Sep 17 2013 tmp -> /var/tmp
drwxr-sr-x 9 root root 4096 Jan 2 2014 usr
drwxr-sr-x 8 root root 4096 May 20 2014 var
sdxc卡設(shè)置使用格式話成ext2或ext3或ext4
root@freescale /$ mkfs.ext2 /dev/mmcblk1p1
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
3923968 inodes, 15691520 blocks
784576 blocks (5%) reserved for the super user
First data block=0
Maximum filesystem blocks=16777216
479 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424
重啟imx6開(kāi)發(fā)板
mmc2: new high speed SDXC card at address 59b4
mmcblk1: mmc2:59b4 SDU1 59.8 GiB
mmcblk1: p1
root@freescale /media$ cd mmcblk1p1/
root@freescale /media/mmcblk1p1$ ls
lost+found
128G的sdxc卡識(shí)別
mmc2: new high speed SDXC card at address 59b4
mmcblk1: mmc2:59b4 SDU1 119 GiB
mmcblk1: p1
EXT2-fs (mmcblk1p1): warning: mounting unchecked fs, running e2fsck is recommend
Ed
root@freescale ~$ cd /media/
root@freescale /media$ ls
mmcblk0p1 mmcblk1p1
root@freescale /media$ cd mmcblk1p1/
root@freescale /media/mmcblk1p1$ ls
lost+found
備注：目前 imx6開(kāi)發(fā)板 測(cè)試支持最大32GiB SDHC卡，最大128GiB SDXC卡(格式化成ext2/3/4使用)。
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