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请问这个问题是什么原因造成的,该如何解决呢。有谁能帮帮我么
只要你原来的板子下载器是OK的,那就可以。有个跳线帽,断开就可以的。具体可以看官方的文档,有详细说明的。最好看看官方的文档,129的板子需要改变几个电阻值,123的好像只动个跳线帽就可以了。