Rock3/Ubuntu

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    ROCK 3 >  Ubuntu

Work with ROCK 3 Ubuntu

Introduction to ROCK 3 Ubuntu

ROCK 3 Ubuntu server is an easy to use system. While working with ROCK 3 Ubuntu Server, you will find it do well on playing music, Internet, Bluetooth, AI and so on.

ROCK 3 Ubuntu server uses systemd to manage system.

Command prepended by $ means the command may be executed by an unprivileged user. And command prepended by # means the command may be executed by an privileged user. But the symbol, $ or #, is not part of the command.

Access from the Host PC/Laptop

Option 1: Serial console

Check Serial Console

Option 2: SSH

SSH server is enabled on port 22 of ROCK 3 default image.

Please use angryip to find your board IP address.

$ ping ip-of-device
$ ssh rock@ip-of-device

Debian Default User Account

Non-root User:

User Name : rock
Password  : rock

Install and update necessary packages

Add Radxa APT, see Radxa APT.

Install packages;

$ sudo apt-get update
$ sudo apt-get install -y rockchip-overlay
$ sudo apt-get install -y linux-4.4-rock-3-latest

Network Connection

There are two methods for network connection. One is Ethernet and the other is WIFI.

Ethernet Connection

You can use a network cable (one end connected to the external network port or route) to connect your ROCK 3 to the network. The ROCK 3 will automatically configure the network for your surfing on the Internet.

To test the Ethernet, we need to follow the steps:

Switch to super user mode by command

$ sudo su

Check whether the Ethernet is normal by command, ifconfig, which would show us a network card, eth0, and the Ethernet IP address. Also, use tool, ping, to connect to a normal domain.

$ ifconfig
$ ping www.baidu.com

If failed to connect to a normal domain, try

$ sudo dhclient eth0

WIFI Connection

When there is not a network cable for your ROCK 3 the WIFI connection is another good choice. ROCK 3 supports 2.4G/5G WIFI and Wi-Fi 6 wireless network.

To test the WIFI performance, we need to follow the steps:

Switch to super user mode

$ sudo su

Open the WIFI

$ nmcli r wifi on

Scan WIFI

$ nmcli dev wifi

Connect to WIFI network

$ nmcli dev wifi connect "wifi_name" password "wifi_password"

Test WIFI perpormance by tool iperf.

Bluetooth

Update necessary packages.

root@rock3a:~# apt-get update
root@rock3a:~# apt-get install  broadcom-wifibt-firmware

Check Bluetooth service.

root@rock3a:~# systemctl status bluetooth

Run Bluetooth service if the Bluetooth service is inactive.

root@rock3a:~# systemctl start bluetooth

Check Bluetooth device.

root@rock3a:~# hciconfig
hci0:   Type: Primary  Bus: UART
       BD Address: 10:2C:6B:49:D5:53  ACL MTU: 1021:8  SCO MTU: 64:1
       UP RUNNING 
       RX bytes:850 acl:0 sco:0 events:58 errors:0
       TX bytes:2814 acl:0 sco:0 commands:58 errors:0

Example: Connect to Bluetooth Speaker.
Install pulseaudio packages.

root@rock3a:~# apt-get install -y pulseaudio-module-bluetooth pulseaudio

Run pulseaudio.

root@rock3a:~$ pulseaudio --start

Connect using bluetoothctl.

root@rock3a:~$ bluetoothctl
[bluetooth]# default-agent 
[bluetooth]# power on
[bluetooth]# scan on
[bluetooth]# trust 77:EC:79:4F:6B:AC
[bluetooth]# pair 77:EC:79:4F:6B:AC
[bluetooth]# connect 77:EC:79:4F:6B:AC

Play songs and enjoy it.

Check DDR size

ROCK 3 has several different DDR sizes, such as 2G, 4G, 8G.

rock@rock3a:~$ free -h
             total        used        free      shared  buff/cache   available
Mem:          7.4Gi        85Mi       7.2Gi       8.0Mi       168Mi       7.2Gi
Swap:            0B          0B          0B

For example, the size of DDR on this board is 8G.

Storage device

eMMC: /dev/mmcblk0
uSD Card: /dev/mmcblk1
NVME M.2 SDD: /dev/nvme0n1

Test RTC Device

First, plug in RTC battery and power on.Check the rtc device:

rock@rock3a:~$ dmesg | grep rtc
[    0.878676] rk808-rtc rk808-rtc: registered as rtc0
[    0.880447] rk808-rtc rk808-rtc: setting system clock to 2017-08-04 09:00:04 UTC (1501837204)

Second, use the follow commands to set the system time and synchronization to the rtc clock.

$ date -s "2021-08-17 20:03:00"
$ hwclock -w
$ hwclock -r
root@rock3a:~# hwclock -r
2021-08-17 20:00:04.745124+00:00 
$ poweroff

and then disconnect the power supply
Third, back to power after 10 mins and check whether the rtc clock run the same time

$ hwclock -r
root@rock3a:~# hwclock -r
2021-08-17 20:10:14.745124+00:00

Test Audio Player

Download a wav audio file, and use the command to test the HP player.

$ amixer -c 1 cset numid=1 3
   numid=1,iface=MIXER,name='Playback Path'
    ; type=ENUMERATED,access=rw------,values=1,items=11
    ; Item #0 'OFF'
    ; Item #1 'RCV'
    ; Item #2 'SPK'
    ; Item #3 'HP'
    ; Item #4 'HP_NO_MIC'
    ; Item #5 'BT'
    ; Item #6 'SPK_HP'
    ; Item #7 'RING_SPK'
    ; Item #8 'RING_HP'
    ; Item #9 'RING_HP_NO_MIC'
    ; Item #10 'RING_SPK_HP'
    : values=3

$ aplay -D plughw:1,0 test.wav
$ Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

To test the Mic recordding， please follow:

$ amixer -c 1 cset numid=2 1
$ arecord -Dhw:1,0 -d 10 -f cd -r 44100 -c 2 -t wav ./mic_test.wav      #this is a record command
 Recording WAVE './mic_test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
$ aplay -D plughw:1,0 mic_test.wav

Test USB Host

Plug in the U dish and use the command by serial console.

rock@rock3a:~$ dmesg | tail
[11831.172069] usb 8-1: SerialNumber: CCYYXI5KH5PRSNCA
[11831.175205] usb-storage 8-1:1.0: USB Mass Storage device detected
[11831.176984] scsi host0: usb-storage 8-1:1.0
[11832.272573] scsi 0:0:0:0: Direct-Access     aigo     U350             1100 PQ: 0 ANSI: 6
[11832.276158] sd 0:0:0:0: [sda] 30720000 512-byte logical blocks: (15.7 GB/14.6 GiB)
[11832.276756] sd 0:0:0:0: [sda] Write Protect is off
[11832.276774] sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00
[11832.277126] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[11832.285978] sda: sda1
[11832.288023] sd 0:0:0:0: [sda] Attached SCSI removable disk

rock@rock3a:~$ sudo mount /dev/sda1 /mnt
rock@rock3a:~$ lsblk
NAME         MAJ:MIN RM  SIZE   RO   TYPE   MOUNTPOINT
sda           8:0    1    14.7G  0    disk 
└─sda1       8:1     1    14.7G  0    part     /mnt

If /dev/sda1 is successfully mounted, this usb host is working properly.

Test fan on / off

Please execute with root permission

root@rock3a:~# echo 0 > /sys/class/pwm/pwmchip0/export
root@rock3a:~# echo 10000 > /sys/class/pwm/pwmchip0/pwm0/period
root@rock3a:~# echo 5000 > /sys/class/pwm/pwmchip0/pwm0/duty_cycle
root@rock3a:~# echo normal >  /sys/class/pwm/pwmchip0/pwm0/polarity

root@rock3a:~# echo 1 > /sys/class/pwm/pwmchip0/pwm0/enable        // on
root@rock3a:~# echo 0 > /sys/class/pwm/pwmchip0/pwm0/enable       //  off

Changelogs

2021.09.15

rock3a_ubuntu_focal_server_arm64_20210914_0859-gpt.img

Kernel version: 4.19.193-10-rockchip-g152e34a538b4

2021.08.24

rock3a_ubuntu_focal_server_arm64_20210823_2119-gpt.img

Kernel version: 4.19.193-2-rockchip-g7cf7399ddb5c
U-Boot version: 2017.09-gbd2fa07970e-210525