[Buildroot] How to flash eMMC

[Arnout Vandecappelle]

 [Please avoid top-posting and writing HTML mails.]

On 01-09-16 19:14, yoda zhong wrote:
> Thank you for your opinion.
> 
>  
> 
> Following is the related kernel log. But I’m not sure where I should copy
> 
> boot/* and rootfs/* of microSD to.

 Well, you said you wanted to flash an SD image, so I assumed you were talking
about the sdcard.img generated by board/beaglebone/post-image.sh. As explained
in board/beaglebone/readme.txt, you just write that to the SD or MMC card with
dd. Based on the kernel log below, in your case it would be:

dd if=sdcard.img of=/dev/mmcblk1

> 
>  
> 
> [    1.735984] mmc0: host does not support reading read-only switch, assuming
> write-enable
> 
> [    1.751294] mmc0: new high speed SDHC card at address aaaa

 This is the SD card (see how it says 'SDHC card' ?)

> 
> [    1.762798] mmcblk0: mmc0:aaaa SS08G 7.40 GiB
> 
> [    1.774493] mmc1: new high speed MMC card at address 0001

 And this is the eMMC (maybe 'MMC card' is a hint?)


 Regards,
 Arnout

> 
> [    1.783724]  mmcblk0: p1 p2
> 
> [    1.806009] mmcblk1: mmc1:0001 MMC04G 3.60 GiB
> 
> [    1.812103] mmcblk1boot0: mmc1:0001 MMC04G partition 1 2.00 MiB
> 
> [    1.828636] mmcblk1boot1: mmc1:0001 MMC04G partition 2 2.00 MiB
> 
> [    1.876569]  mmcblk1: p1
> 
> [    1.921456] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode.
> Opts: (null)
> 
> [    1.930280] VFS: Mounted root (ext4 filesystem) on device 179:2.
> 
> [    1.950790] devtmpfs: mounted
> 
> [    1.956266] Freeing unused kernel memory: 1024K (c0c00000 - c0d00000)
> 
> [    2.113623] EXT4-fs (mmcblk0p2): re-mounted. Opts: data=ordered
> 
>  
> 
> Following is the related dev list.
> 
>  
> 
> mmcblk0
> 
> mmcblk0p1
> 
> mmcblk0p2
> 
> mmcblk1
> 
> mmcblk1boot0
> 
> mmcblk1boot1
> 
> mmcblk1p1

[snip]

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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