UART串口通信我们经常会使用到，比较常用的是查看对应UART节点的波特率，修改波特率和设置相关属性,如下做一下描述
1.查看波特率相关信息
shell@firefly:/ # busybox stty -F /dev/ttyS1
speed 9600 baud; line = 0;
intr = ^C; quit = ^; erase = ^?; kill = ^U; eof = ^D; eol = ;
eol2 = ; swtch = ; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-brkint -imaxbel
2.设置串口波特率
shell@firefly:/ # busybox stty -F /dev/ttyS1 115200
#查看一下/dev/ttyS1属性
shell@firefly:/ # busybox stty -F /dev/ttyS1
speed 115200 baud; line = 0;
intr = ^C; quit = ^; erase = ^?; kill = ^U; eof = ^D; eol = ;
eol2 = ; swtch = ; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-brkint -imaxbel
3.关闭回显
shell@firefly:/ # busybox stty -echo -F /dev/ttyS1
#查看一下/dev/ttyS1属性
shell@firefly:/ # busybox stty -F /dev/ttyS1
speed 115200 baud; line = 0;
intr = ^C; quit = ^; erase = ^?; kill = ^U; eof = ^D; eol = ;
eol2 = ; swtch = ; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-brkint -imaxbel
-echo
#可以注意到最好有添加了-echo属性