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USB Interface

  • Repeatedly unplugging peripherals

    Repeatedly plug and unplug the USB peripherals to ensure that they are recognised and work properly every time.

    1. Identify the mouse and keyboard
    lsusb Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 007
Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001:
ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 005 Device 001: ID 1d6b:0002
Linux Foundation 2.0 root hub
Bus 004 Device 002: ID c0f4:04c0 SZH usb keyboard
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002
Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001:
ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 0000:3825 USB OPTICAL MOUSE
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub Bus 001 Device
001: ID 1d6b:0002 Linux Foundation 2.0 root hub

    As shown above, the mouse (USB OPTICAL MOUSE) and keyboard (usb keyboard) have been successfully recognised here.

    1. Identify the storage device.
    lsusb Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 007
Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 006 Device 002: ID 067b:2731 Prolific Technology, Inc. USB SD Card
Reader
    Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 005
Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001:
ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0002
Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux
Foundation 1.1 root hub Bus 001 Device 002: ID 1a40:0101 Terminus Technology
Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

    As shown above, the Micro-SD Card Reader has been successfully recognised here.

  • Waking up peripherals

    1. After 10 minutes of hibernation, operate the USB peripherals, such as keyboard and mouse, to see if the system wakes up normally.

    2. Enter the account password, log in to the system, check whether the peripheral devices are waking up and working properly, such as WIFI, sound card, etc.

    3. Operate three times

    Note: USB OTG port detection

  • Transmission Rate

    1. Identify the USB memory device

    Confirm USB memory device via lsblk

    pwm fan result img

    As shown above, the USB storage device inserted into Radxa CM3I IO Board is /dev/sda.

    1. Read test
    radxa@radxa-cm3i-io:~$ sudo dd if=/dev/sda of=/dev/null bs=1M
count=100 100+0 records in 100+0 records out 104857600 bytes (105 MB, 100
MiB) copied, 1.31635 s, 79.7 MB/s

    This command will read data from the USB device and write it to /dev/null in order to test the read speed. The block size specified here is 1M, and 100 blocks are specified to be read, so a total of 100 MB of data is read at 79.7 MB/s.

    1. Write Test
    radxa@radxa-cm3i-io:~$ sudo dd if=/dev/zero of=/dev/sda bs=1M
count=100 100+0 records in 100+0 records out 104857600 bytes (105 MB, 100
MiB) copied, 2.86056 s, 36.7 MB/s

    The block size specified here is 1M, 100 blocks were written, a total of 100 M of data was written, and the write speed was 36.7 MB/s.