This documentation will introduce how to use the UART of
UART_E pin in
40-PIN HEADER is pin15 and pin16:
UART_E default is enabled in
kvim4.dts, the corresponding dev node is
You need a USB to TTL Converter, one end is connected to the computer, the other end is connected to pin 15, pin 16.
Install ComAssistant application on VIM4, then setup the baudrate to
9600and chose the uart device node to
Install the SecureCRT tool on PC host, then chose correct serial port number and setup the baudrate to
PC host sends the number
12345678, and VIM4 sends the character serial send test.
The run result is as following, VIM4 recevie
12345678from PC, and PC recevie
serial send testfrom VIM4.