你的程序有錯誤
- //STC15系列 IO口
- #include "reg51.h"
- sfr P1M1 = 0x91;
- sfr P1M0 = 0x92;
- sfr P2M1 = 0x95;
- sfr P2M0 = 0x96;
- sfr P3M1 = 0xb1;
- sfr P3M0 = 0xb2;
- void main()
- {
- P1M0 = 0x00; //PxM1.n,PxM0.n =00--->Standard, 01--->push-pull
- P1M1 = 0x00; // =10--->pure input, 11--->open drain
- P2M0 = 0x00;
- P2M1 = 0x00;
- P3M0 = 0x00;
- P3M1 = 0x00;
-
- P1=0x00;
- P2=0x00;
- P3=0x00;
- }
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