Linux USB Host

USB Host

Plug in a USB mass storage device / mouse / keyboard / any other supported USB device to any of the USB host ports on your DVK.

USB Mass Storage Device Example

After inserting a USB stick you should get output similar to this:

usb 1-1: new high-speed USB device number 3 using ci_hdrc
usb-storage 1-1:1.0: USB Mass Storage device detected
scsi1 : usb-storage 1-1:1.0
scsi 1:0:0:0: Direct-Access     SanDisk  U3 Cruzer Micro  8.02 PQ: 0 ANSI: 0 CCS
sd 1:0:0:0: [sda] 3907583 512-byte logical blocks: (2.00 GB/1.86 GiB)
sd 1:0:0:0: [sda] Write Protect is off
sd 1:0:0:0: [sda] No Caching mode page found
sd 1:0:0:0: [sda] Assuming drive cache: write through
sd 1:0:0:0: [sda] No Caching mode page found
sd 1:0:0:0: [sda] Assuming drive cache: write through
 sda: sda1 sda2
sd 1:0:0:0: [sda] No Caching mode page found
sd 1:0:0:0: [sda] Assuming drive cache: write thr

List directory content:

# ls /run/media/sda1
$RECYCLE.BIN                   bookmarks-2015-06-25.json
Android                        iMX6_gpio_test
LOST.DIR                       junk
LS1021_SOM                     linux-3.2.0-psp04.06.00.11
Movies                         tek00000.png
Mpeg                           tek00001.png
Music                          tek00002.png
Playlists                      test0.wav
SanDiskSecureAccessV2.0        test2.wav
SanDiskSecureAccessV2_win.exe  test3.wav
System Volume Information      testx.wav
TIInit_11.8.32.bts             vmlinux
VAR-SOM-AM33-SCHV212.DSN       wifi_fw_android_working
am43-demo                      wl1271-nvs.bin
apk                            xorcom
backing_file                   zImage

Write some data:

# dd if=/dev/urandom of=/run/media/sda1/junk bs=1M count=20 
20+0 records in
20+0 records out
20971520 bytes (21 MB) copied, 22.9626 s, 913 kB/s

FTDI Example

After inserting the FTDI device you should get output similar to this:

usb 1-1: new full-speed USB device number 5 using ci_hdrc
usbcore: registered new interface driver usbserial
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial support registered for generic
usbcore: registered new interface driver ftdi_sio
usbserial: USB Serial support registered for FTDI USB Serial Device
ftdi_sio 1-1:1.0: FTDI USB Serial Device converter detected
usb 1-1: Detected FT232RL
usb 1-1: Number of endpoints 2
usb 1-1: Endpoint 1 MaxPacketSize 64
usb 1-1: Endpoint 2 MaxPacketSize 64
usb 1-1: Setting MaxPacketSize 64
usb 1-1: FTDI USB Serial Device converter now attached to ttyUSB0

Start minicom and set the interface:

# minicom -s

connect pin 2 to 3 on the serial port and test for loop-back.