Difference between revisions of "Zero/Ubuntu"
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Revision as of 13:18, 14 October 2021
Radxa Zero > Ubuntu
Contents
Work with Radxa Zero Ubuntu
Introduction to Radxa Zero Ubuntu
Radxa Zero Ubuntu is an easy to use system. While working with Radxa Zero Debian, you will find it do well on playing music, Internet, Bluetooth and so on.
Radxa Zero Ubuntu 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 Radxa Zero image.
Please use angryip to find your board IP address.
$ ping ip-of-device $ ssh rock@ip-of-device
Ubuntu 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
Network Connection
There is one method for network connection, WIFI.
WIFI Connection
Radxa Zero supports 2.4G/5G WIFI 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.
Common Hardware Interfaces, I2C, PWM, SPI, UART, etc
The Radxa Zero system images use configuration file /boot/uEnv.txt.
Warning: Remember there is only one line including item "overlays=" in file /boot/uEnv.txt.
Make sure that kernel is newer than 5.10.69-2-amlogic. If not, then try
$ sudo apt update $ sudo apt install -y linux-headers-5.10.69-3-amlogic-gacf75c74f9 $ sudo apt install -y linux-image-5.10.69-3-amlogic-gacf75c74f9
I2C
To enable I2C_EE_M1 on GPIOH_6 and GPIOH_7 (/dev/i2c-1), add item "meson-g12a-i2c-ee-m1-gpioh-6-gpioh-7" to the "overlays=" line.
overlays=meson-g12a-i2c-ee-m1-gpioh-6-gpioh-7
To enable I2C_EE_M1 on GPIOX_10 and GPIOX_11 (/dev/i2c-1), add item "meson-g12a-i2c-ee-m1-gpiox-10-gpiox-11" to the "overlays=" line.
overlays=meson-g12a-i2c-ee-m1-gpiox-10-gpiox-11
To enable I2C_EE_M3 (/dev/i2c-3), add item "meson-g12a-i2c-ee-m3-gpioa-14-gpioa-15" to the "overlays=" line.
overlays=meson-g12a-i2c-ee-m3-gpioa-14-gpioa-15
To enable I2C_AO_M0 (/dev/i2c-4), add item "meson-g12a-i2c-ao-m0-gpioao-2-gpioao-3" to the "overlays=" line.
overlays=meson-g12a-i2c-ao-m0-gpioao-2-gpioao-3
PWM
To enable PWM_C, add item "eson-g12a-pwm-c-on-gpiox-8" to the "overlays=" line.
overlays=eson-g12a-pwm-c-on-gpiox-8
To enable PWMAO_A, add item "meson-g12a-pwmao-a-on-gpioao-11" to the "overlays=" line.
overlays=meson-g12a-pwmao-a-on-gpioao-11
SPI
To enable SPI1, add item "meson-g12a-spi-spidev" to the "overlays=" line.
overlays=meson-g12a-spi-spidev param_spidev_spi_bus=0 param_spidev_spi_cs=0 param_spidev_max_freq=10000000
UART
To set UART_EE_C as common serial communication devices, add these items "meson-g12a-uart-ee-c" to the "overlays=" line. The device /dev/ttyAML4 is available.
overlays=meson-g12a-uart-ee-c