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之前可以正常使用，插上usb之后led灯闪烁。
若干次擦写固件之后，突然flash burner工具就识别不了demo板了，我打开设备管理器，也看不到demo板。
现在led灯 d3 d6常亮，不像之前一样闪烁了。
您好，卸载再重新安装flash burner 试了吗？安装完之后重启电脑试试呢。
这是Flash burner的User's guide，您参考下：
https://www.ti.com/lit/ug/sllu125d/sllu125d.pdf
