U-Boot UMS on APF & OPOS: Difference between revisions
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(New page: Infos for U-Boot's USB Mass Storage gadget mode (or UMS) usage on APF6. * First branch a second usb cable on otg APF6_Dev port. And keep your usb debug cable. (then you need 2 usb-cable)...) |
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Infos for U-Boot's USB Mass Storage gadget mode (or UMS) usage on APF6. | Infos for U-Boot's USB Mass Storage gadget mode (or UMS) usage on [[APF6]]. | ||
* First | * First connect a second [[USB]] cable on OTG [[APF6_Dev]] port. And keep your USB debug cable. (then you need 2 USB cables). | ||
* Under | * Under U-Boot type: | ||
<pre class="apf"> | <pre class="apf"> | ||
BIOS> ums 0 mmc 0 | BIOS> ums 0 mmc 0 | ||
| Line 8: | Line 8: | ||
| | | | ||
</pre> | </pre> | ||
* On your host computer you should see the eMMC partition like a standard USB key. | * On your host computer you should see the [[eMMC]] partition like a standard USB key. | ||
<pre class="host"> | <pre class="host"> | ||
$ dmesg | $ dmesg | ||
| Line 18: | Line 18: | ||
</pre> | </pre> | ||
Here the device is /dev/sdc and all | Here the device is ''/dev/sdc'' and all partitions have been automounted by the host: | ||
<pre class="host"> | <pre class="host"> | ||
| Line 29: | Line 29: | ||
</pre> | </pre> | ||
{{Warning| Before doing the following procedure, be sure that your device name is correct. You can erase all your host datas if you do it wrong}} | {{Warning| Before doing the following procedure, be sure that your device name is correct. You can erase all your host datas if you do it wrong}} | ||
* The rootfs is under the sdc2 and is named "rootfs". In debian/ | * The rootfs is under the sdc2 and is named "rootfs". In debian/ubuntu it's mounted under ''/media/usb1'' if no other usb keys present on system. | ||
<pre class="host"> | <pre class="host"> | ||
$ ls /media/usb1/ | $ ls /media/usb1/ | ||
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</pre> | </pre> | ||
* To flash rootfs entirelly, first erase all files on this partition : | * To flash rootfs entirelly, first erase all files on this partition: | ||
<pre class="host"> | <pre class="host"> | ||
$ sudo umount /media/usb1 | $ sudo umount /media/usb1 | ||
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</pre> | </pre> | ||
* Untar the archive generated by your bsp (in buildroot/output/images/) | * Untar the archive generated by your bsp (in ''buildroot/output/images/'') | ||
<pre class="host"> | <pre class="host"> | ||
$ cd /tmp/rootfs | $ cd /tmp/rootfs | ||
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</pre> | </pre> | ||
* Once unmounted, you can kill the | * Once unmounted, you can kill the U-Boot's USB gadget process with a Ctrl-C: | ||
<pre class="apf"> | <pre class="apf"> | ||
BIOS> ums 0 mmc 0 | BIOS> ums 0 mmc 0 | ||
Revision as of 15:45, 23 November 2015
Infos for U-Boot's USB Mass Storage gadget mode (or UMS) usage on APF6.
- First connect a second USB cable on OTG APF6_Dev port. And keep your USB debug cable. (then you need 2 USB cables).
- Under U-Boot type:
BIOS> ums 0 mmc 0 UMS: disk start sector: 0x0, count: 0x760000 |
- On your host computer you should see the eMMC partition like a standard USB key.
$ dmesg [...] [26828.348088] sd 13:0:0:0: [sdc] Mode Sense: 0f 00 00 00 [26828.348395] sd 13:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [26828.354177] sdc: sdc1 sdc2 [26828.356782] sd 13:0:0:0: [sdc] Attached SCSI disk
Here the device is /dev/sdc and all partitions have been automounted by the host:
[26830.002168] EXT4-fs (sdc1): mounting ext2 file system using the ext4 subsystem [26830.054358] EXT4-fs (sdc2): mounting ext2 file system using the ext4 subsystem [26830.078638] EXT4-fs (sdc2): warning: mounting unchecked fs, running e2fsck is recommended [26830.114382] EXT4-fs (sdc2): mounted filesystem without journal. Opts: (null) [26830.135564] EXT4-fs (sdc1): warning: mounting unchecked fs, running e2fsck is recommended [26830.268450] EXT4-fs (sdc1): mounted filesystem without journal. Opts: (null)
 |
Warning: Before doing the following procedure, be sure that your device name is correct. You can erase all your host datas if you do it wrong |
- The rootfs is under the sdc2 and is named "rootfs". In debian/ubuntu it's mounted under /media/usb1 if no other usb keys present on system.
$ ls /media/usb1/ bin boot dev etc home init lib lib32 linuxrc lost+found media mnt opt proc root run sbin sys tmp usr var
- To flash rootfs entirelly, first erase all files on this partition:
$ sudo umount /media/usb1 $ sudo mkfs.ext4 /dev/sdc2
- Then mount it under an arbitrary directory:
$ sudo mkdir /tmp/rootfs $ sudo mount /dev/sdc2 /tmp/rootfs
- Untar the archive generated by your bsp (in buildroot/output/images/)
$ cd /tmp/rootfs $ sudo tar -xvf /usr/local/projects/armadeus/apf6/buildroot/output/images/apf6-rootfs.tar
- then umount the filesystem:
$ sudo umount /tmp/rootfs/ $ sync
- Once unmounted, you can kill the U-Boot's USB gadget process with a Ctrl-C:
BIOS> ums 0 mmc 0 UMS: disk start sector: 0x0, count: 0x760000 CTRL+C - Operation aborted BIOS>
