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TM4C129X GPIO写1不成功问题

Other Parts Discussed in Thread: TM4C129XNCZAD

工程师您好,

我现在使用了TM4C129XNCZAD这个芯片,GPIO的PM4和PM5引脚分别接了两个LED灯,想通过对GPIO的写0实现灯灭,写1实现灯亮的功能。结果对PM4引脚的操作就可以实现灯亮和灯灭,但是PM5在灯亮之后写0就不成功。用万用表测了相应的电压值,也一直处于高电平。

求问这是什么原因呢?