[root@EmbedSky /]# serial_test
readserailcfg
serialread.dev is /dev/tq2440_serial1
serialread.speed is 115200
serialread.databits is 8
serialread.stopbits is 1
serialread.parity is N
Can't Open Serial Port: No such file or directory
Can't Open Serial Port!
打不开串口是什么意思啊??郁闷啊!