Introduction

The Maivin's default serial console is available on the internal debug UART which maps in Linux as ttymxc2. Additional consoles can be enabled to allow logins over alternative UARTs.

Note that u-Boot and Kernel boot messages are only supported on ttymxc2 (UART3).

Serial Ports

This table lists the serial ports (UART) available on the Maivin.

UART	Serial Port	Physical Location	Note
UART1	ttymxc0	Rear Terminal Block	RS-485
UART2	ttymxc1	PCIe
UART3	ttymxc2	Internal Header	Debug Console
UART4	ttymxc3	Bluetooth UART	Configurable as Internal Header

Configuration

Additional serial consoles are configured through SystemD using the following commands.

Note these examples use the RS-485 (ttymxc0) as an example, replace ttymxc0 with the serial port you wish to configure as an additional console.

Enable Console

sudo systemctl enable serial-getty@ttymxc0.service

Start Console

sudo systemctl start serial-getty@ttymxc0.service

Stop Console

sudo systemctl stop serial-getty@ttymxc0.service

Disable Console

sudo systemctl disable serial-getty@ttymxc0.service

Advanced Configuration

For advanced configuration such as overriding the default baudrate or hardware flow-control settings initially configured by the kernel you will need to copy the serial-getty template and modify it to your needs. To do this copy the template from the following location and edit according to your needs, additional documentation is provided within the template file.

/usr/lib/systemd/system/serial-getty@.service

Additional Serial Consoles