uart模式配置问题

ffffdddd3

skyeye-1.3.5_rc1
安装完，自带的arm_hello，将其配置文件中uart配置更改为mod=stdio：
#skyeye config file sample
arch:arm
cpu: arm7tdmi
mach: at91
mem_bank: map=M, type=RW, addr=0x01000000, size=0x00400000
mem_bank: map=I, type=RW, addr=0xf0000000, size=0x10000000
uart: mod=stdio

启动skyeye，运行start命令之后就会不停的出现如下错误，只能Ctrl+z停止。之前设置为term的方式运行正常。
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd
(skyeye) *** Unknown command: EOF
*** Get commands with 'help' cmd

[3]+  已停止               skyeye -e arm_hello