cm211-2用HiTool刷出问题，出现了以下的英文

kuashy · 发表于 2022-2-3 00:41

本帖最后由魔刹石于 2022-2-3 10:51 编辑

提示
串口已经连接，请给单板上电，若已经上电，请断电后重新上电。
Timeout error.

Failed to send type frame. It may be caused by the following reasons:
1. The board is not powered on or off again;
2. The selected serial port is incorrect;
3. The bootstrap function of the chip OTP is disabled.
Failed to download fastboot!

请问这个是要怎么办呢？？