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天嵌i.MX6UL开发平台存储设备的测试方法

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非也 发表于 2017-9-6 14:43:17 | 显示全部楼层 |阅读模式
  天嵌科技工业级i.MX6UL_B版配有4路Usb Host (2路双层USB接口,USB2/USB4与扩展接口/4PIN排针复用,可通过电阻选择,默认使用双层USB接口)和1路Usb OTG;由于系统使用的是ubi文件系统。所以在对文件系统进行写操作后,如果要断电、复位、重启等,请先执行sync,否则有可能写入的数据丢失。
  1、tf卡
  接上tf卡,系统会类似的打印以下信息:
  # mmc0: host does not support reading read-only switch, assuming write-enable
  mmc0: new high speed SDHC card at address 0001
  mmcblk0: mmc0:0001 SD8GB 7.27 GiB
  mmcblk0: p1 p2 #生成2个节点mmcblk0p1 mmcblk0p2
  可以通过mount 查看卡的挂载目录。可以像正常文件系统一样操作卡内的文件。另外,在修改数据过后,拔出卡时请先执行sync,否则会有低概率等造成数据修改失败。以下是笔者使用tf 启动卡进行测试的过程:
  #
  # mmc0: host does not support reading read-only switch, assuming write-enable
  mmc0: new high speed SDHC card at address 0001
  mmcblk0: mmc0:0001 SD8GB 7.27 GiB
  mmcblk0: p1 p2
  EXT3-fs (mmcblk0p2): error: couldn't mount because of unsupported optional features (240)
  FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
  EXT2-fs (mmcblk0p2): error: couldn't mount because of unsupported optional features (244)
  EXT4-fs (mmcblk0p2): recovery complete
  EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
  # mount
  ubi0:rootfs on / type ubifs (rw,relatime)
  devtmpfs on /dev type devtmpfs (rw,relatime,size=89476k,nr_inodes=22369,mode=755)
  proc on /proc type proc (rw,relatime)
  devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620)
  tmpfs on /dev/shm type tmpfs (rw,relatime,mode=777)
  tmpfs on /tmp type tmpfs (rw,relatime)
  tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
  sysfs on /sys type sysfs (rw,relatime)
  /dev/mmcblk0p2 on /run/media/mmcblk0p2 type ext4 (rw,relatime,data=ordered)
  /dev/mmcblk0p1 on /run/media/mmcblk0p1 type vfat
  (rw,relatime,gid=6,fmask=0007,dmask=0007,allow_utime=0020,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
  #
  # ls /run/media/mmcblk0p1
  imx6ul-14x14-evk.dtb zImage
  # echo 1234 > /run/media/mmcblk0p1/tmp.txt
  # cat /run/media/mmcblk0p1/tmp.txt
  1234
  # sync
  # mmc0: card 0001 removed
  #
  2、U盘
  测试U 盘的方法和SD 卡的方法一样,只不过命令行中的mmcblk1p1 换成sda1 。
  # usb 1-1.4: new high-speed USB device number 4 using ci_hdrc
  usb-storage 1-1.4:1.0: USB Mass Storage device detected
  scsi host1: usb-storage 1-1.4:1.0
  scsi 1:0:0:0: Direct-Access SanDisk Ultra 1.00 PQ: 0 ANSI: 6
  sd 1:0:0:0: [sda] 60062500 512-byte logical blocks: (30.7 GB/28.6 GiB)
  sd 1:0:0:0: [sda] Write Protect is off
  sd 1:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
  sda: sda1
  sd 1:0:0:0: [sda] Attached SCSI removable disk
  FAT-fs (sda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
  # mount
  ubi0:rootfs on / type ubifs (rw,relatime)
  devtmpfs on /dev type devtmpfs (rw,relatime,size=89476k,nr_inodes=22369,mode=755)
  proc on /proc type proc (rw,relatime)
  devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620)
  tmpfs on /dev/shm type tmpfs (rw,relatime,mode=777)
  tmpfs on /tmp type tmpfs (rw,relatime)
  tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
  sysfs on /sys type sysfs (rw,relatime)
  /dev/sda1 on /run/media/sda1 type fuseblk
  (rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
  # ls /run/media/sda1
  1G_file SanDiskSecureAccess
  # usb 1-1.4: USB disconnect, device number 4

  天嵌工控板i.MX6UL_B版,拥有丰富的Usb接口,可满足客户产品各种要求。上文介绍的测试方法您掌握了没有?如有不明白之处请联系天嵌科技技术支持:
  1 论坛:http://www.armbbs.net
  2 电话:020-38373101/38219415 转 810/814
  3 邮箱:support@embedsky.net
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