EB-SS928-DC-393型开发板-emmc如何使用？

如果使用emmc启动的话，具体跳的哪个位置的电阻呢

这个要看看原理图了，应该要跳不少电阻，可以联系一下厂家售后，问清楚具体要怎么修改

对，看内核进去，emmc应该是初始化过了。
`~ # fdisk -l
Disk /dev/mmcblk0: 15 GB, 15636365312 bytes, 30539776 sectors
477184 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes

Disk /dev/mmcblk0 doesn’t contain a valid partition table`

格式化分区一下就可以挂载了。
`
fdisk /dev/mmcblk0
Command (m for help): d
No partition is defined yet!

Command (m for help): n
Partition type
p primary partition (1-4)
e extended
p
Partition number (1-4): 1
First sector (16-30539775, default 16):
Using default value 16
Last sector or +size{,K,M,G,T} (16-30539775, default 30539775):
Using default value 30539775

Command (m for help):
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table
mmcblk0: p1
/home/tmp #
/home/tmp #
/home/tmp # mkfs.vfat /dev/mmcblk0p1
random: crng init done
random: 1 urandom warning(s) missed due to ratelimiting
/home/tmp #
/home/tmp #
/home/tmp # mkfs.vfat /dev/mmcblk0p1
/home/tmp # mount /dev/mmcblk0p1 /home/tmp/

/home/tmp # df -h
Filesystem Size Used Available Use% Mounted on
ubi0:ubifs 112.8M 59.5M 53.3M 53% /
devtmpfs 227.0M 0 227.0M 0% /dev
tmpfs 229.2M 0 229.2M 0% /run
/dev/mmcblk0p1 14.5G 8.0K 14.5G 0% /home/tmp
`