linux下stm32flash下载出错:Unexpected reply from device on command 0x01

我的系统是linux mint18.1 在终端执行：sudo stm32flash /dev/ttyUSB0 报错：
stm32flash 0.5

http://stm32flash.sourceforge.net/

Interface serial_posix: 57600 8E1
Failed to read ACK byte
Unexpected reply from device on command 0x01

求解！怎么修复啊！
奉上小弟所有c币 感谢各位大牛！

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