请教前辈,现在我在做矩阵键盘和多向按键的实验,不会用PJ口,具体问题如下:
P15,P16,P17口子会用 但是 那个PJ0,PJ1,PJ2,PJ3的口子要怎么用呢? (我想的是当P15有中断发生后去查询哪个PJ电平有变化)
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请教前辈,现在我在做矩阵键盘和多向按键的实验,不会用PJ口,具体问题如下:
P15,P16,P17口子会用 但是 那个PJ0,PJ1,PJ2,PJ3的口子要怎么用呢? (我想的是当P15有中断发生后去查询哪个PJ电平有变化)