stty command

1. Serial configuration

stty -F /dev/ttyS1 raw 115200 cs8 -parenb -cstopb

/dev/ttyS1: serial port file descriptor
115200: baud rate 115200
cs8: data bit 8
-parenb: no parity bit
-cstopb: 1 stop bit
raw: display the original value without escaping. If raw is not added, the shell cannot display data sent from the serial port to the device.

stty --help help documentation:
insert image description here

N : set the input and output speeds to N bauds
to set the baud rate to N, for example 9600 4800

insert image description here
csN: set character size to N bits, N in [5…8]
set the data bit to N, such as cs8, cs7

[-]cstopb: use two stop bits per character (one with '-')
to set the stop bit:
cstopb: 2 stop bits
-cstopb: 1 stop bit

[-]parenb: generate parity bit in output and expect parity bit in input (generate parity bit in output and require parity bit in input) parenb enables the terminal to perform parity check, -parenb disables
it check
-parenb: no check digit

[-]parodd: set odd parity (or even parity with '-')
parenb parodd: odd parity
parenb -parodd: even parity

2. Serial port test

Serial port parameter configuration:
[root@/]# stty -F /dev/ttyS1 raw 4800 cs8 -parenb cstopb
[root@/]#
insert image description here
View PC configuration information: