请看回复是否能帮到你，
以KF8TS2508为例，P0端口初始化设置：
P0LR = 0b00000000; //set output level(1->high /0->low)
TR0 = 0b00001001; //set P0 port direction(1->input /0->output)
PUR0 = 0b00000001; //pull up(1->pull up enable /0-> pull up disable)
IOCL = 0b00000000; //IOC(1-> IOC enable / 0-> IOC disable)
单个端口使用：
unsigned char Key_Level;
Key_Level = P00; //read P00
P0LR1 = 1; //P01 output high
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楼主
