emmc启动后找不到卡MMC: no card present，请问是啥原因呢~？

常在我心

uboot二进制文件拷贝到emmc，只能通过MFG烧吗？
我sd卡启动系统后，通过dd命令把uboot烧到emmc上，然后拨码到emmc启动方式启动后，uboot起来了， 但提示MMC: no card present，
下面是emmc启动后打印
U-Boot 2014.04-08650-g5b983bd-dirty (Feb 24 2016 - 02:25:13)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
CPU:   Temperature 31 C, calibration data: 0x5734dd69
Reset cause: POR
Board: MX6-SabreSD
DRAM:  1 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
MMC Device 2 not found
No MMC card found
Using default environment

phy link never came up
DEBUG_R0: 0x00601a00, DEBUG_R1: 0x08200000
No panel detected: default to Hannstar-XGA
Display: Hannstar-XGA (1024x768)
In:    serial
Out:   serial
Err:   serial
Net:   @=====phy_realtek_init 1==
@=====phy_realtek_init enter==
@=====phy_register 233==
@=====phy_register 233==
@=====phy_register 233==
@=====phy_realtek_init enter end==
@=====phy_realtek_init 2==
Phy not found
PHY reset timed out
FEC [PRIME]
Warning: failed to set MAC address

Normal Boot
Hit any key to stop autoboot:  0
MMC: no card present
mmc0(part 0) is current device
MMC: no card present
Booting from net ...
*** ERROR: `ethaddr' not set
WARN: Cannot load the kernel image
=>

执行 mmc命令
=> mmcinfo
Device: FSL_SDHC
Manufacturer ID: 0
OEM: 0
Name: Tran Speed: 0
Rd Block Len: 0
MMC version 0.0
High Capacity: No
Capacity: 0 Bytes
Bus Width: 0-bit
=>


=> mmc list
FSL_SDHC: 0
FSL_SDHC: 1
=>

=> mmc dev 0
MMC: no card present
mmc0(part 0) is current device
=>


=> mmc dev 1
MMC: no card present
mmc1(part 0) is current device
=>


更改uboot参数，提示无法写入
=> setenv bootargs_base 'setenv bootargs console=ttymxc0,115200'

=> saveenv

MMC Device 2 not found
No MMC card found
=>


请问是什么原因呢，是否emmc里面的uboot不能和sd卡的uboot一样吗？必须要重新编译uboot指定emmc dev 为0 吗？

我知道答案 目前已有7人回答

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常在我心

自己查清楚了，已解决了

小智MM

恭喜楼主问题已经解决

zxfkty

常在我心 发表于 2016-3-21 10:43
自己查清楚了，已解决了

请问下是什么原因造成的呢？

箱l子

我现在也遇到了相同的问题，请问下楼主是什么原因造成的呢？

okwh

初始化失败？