Peter: 1 Version importiert

2023-10-31T08:03:10Z

1 Version importiert

← Nächstältere Version	Version vom 31. Oktober 2023, 10:03 Uhr
(kein Unterschied)

en>Peter: 1 Version importiert

2023-08-22T19:35:53Z

1 Version importiert

Neue Seite

The SBC-i.MX51 provides a USB hub connected to USB Host 1 of the i.MX processor.

'''V1.2''': 4-port hub

'''V2.1''': 7-port hub, 2 ports on the extension connector

== Kernel configuration ==

Device Drivers --->
[*] USB support --->
<*> Support for Host-side USB
-*- USB selective suspend/resume and wakeup
<*> EHCI HCD (USB 2.0) support
[*] Support for Freescale controller
[*] Support for Host1 port on Freescale controller
[*] Root Hub Transaction Translators

For mass storage devices, like USB flash disks:

Device Drivers --->
SCSI device support --->
<*> SCSI device support
[*] legacy /proc/scsi/ support
<*> SCSI disk support
[*] Probe all LUNs on each SCSI device
[*] USB support --->
<*> USB Mass Storage support

For [https://en.wikipedia.org/wiki/Human_interface_device HID]s, like USB mouse and keyboard:

Device Drivers --->
[*] HID Devices --->
-*- Generic HID support
<*> USB Human Interface Device (full HID) support

== Test in Linux ==

We will create a partition on a USB flash disk, write a random file to it and read it back.

*Connect a USB flash disk to one of the 4 USB-A jacks.

*Linux will automatically detect the new device:
usb 1-1.4: new high speed USB device using fsl-ehci and address 3
usb 1-1.4: configuration #1 chosen from 1 choice
scsi0 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
scsi 0:0:0:0: Direct-Access Corsair Flash Voyager 1100 PQ: 0 ANSI: 0 CCS
sd 0:0:0:0: [sda] 7831552 512-byte hardware sectors: (4.00 GB/3.73 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] 7831552 512-byte hardware sectors: (4.00 GB/3.73 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00
sd 0:0:0:0: [sda] Assuming drive cache: write through
sda: sda1
sd 0:0:0:0: [sda] Attached SCSI removable disk
usb-storage: device scan complete

We assume that the new device corresponds to the device file ''/dev/sda'' from now on.

* Create single partition:
fdisk /dev/sda
p (prints partition table)
d (deletes existing partitions) ...repeat until no partitions exist
n (adds a new parition) ...select maximum size
w (writes partition table and exits)

* Make ext3 file system and mount it:
mkfs.ext3 /dev/sda
mkdir /mnt/usbdisk
mount /dev/sda1 /mnt/usbdisk

* Create random file:
dd if=/dev/urandom of=/randomfile bs=10M count=1

* Copy random file to USB disk and unmount card:
cp /randomfile /mnt/usbdisk
umount /mnt/usbdisk

* Mount USB disk again and check randomfile:
mount /dev/sda1 /mnt/sdcard
diff /mnt/usbdisk/randomfile /randomfile

''diff'' must not output anything, which means the files are 100% identical.

[[Category:SBC-i.MX51]]
[[Category:i.MX]]

USB Hub (SBC-i.MX51) - Versionsgeschichte

Peter: 1 Version importiert

en>Peter: 1 Version importiert