Wiren Board 4: RS-232 Extension Module

Pinout

The RS-232 signals are output to the terminals of the O1-O3 extension module.

Pinout:

• O1 - GND
• O2 - TX
• O3 - RX

Multiplexing

The RS-232 module is multiplexed with an uninsulated RS-485 port. Their simultaneous operation is not allowed

Configuration

To work with RS-232, the Wiren Board kernel must be configured in a specific way.

In the

 /boot/uEnv.txt   

file

you need to replace the line

fdt_file=/boot/dtbs/imx23-wirenboard41.dtb

на

fdt_file=/boot/dtbs/imx23-wirenboard41-rs232.dtb

и перезагрузить контроллер командой

reboot

См. статьи Просмотр файлов контроллера с компьютера и SSH.

Работа

Порт доступен в системе как

/dev/ttyNSC1