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DM8148打印输出乱码问题



之前主板是ok的,可再次使用时出现串口打印输出不到1行乱码或几行乱码后停止输出,实在不知道是怎么回事?

状态:电压电流感觉正常,两个工作灯正常亮

新人无从下手,望大家给点建议,再次表示感谢!