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K1-K4 键状态显示
- #include <reg52.h>
- #define uchar unsigned char
- #define uint unsigned int
- sbit LED1 = P0^0;
- sbit LED2 = P0^1;
- sbit LED3 = P0^2;
- sbit LED4 = P0^3;
- sbit K1 = P1^0;
- sbit K2 = P1^1;
- sbit K3 = P1^2;
- sbit K4 = P1^3;
- void DelayMS(uint x)
- {
- uchar t;
- while(x--)
- {
- for(t=120;t>0;t--);
- }
- }
- void main()
- {
- P0=0xff;
- P1=0xff;
- while(1)
- {
- LED1 = K1;
- LED2 = K2;
- if(K3==0)
- {
- while(K3==0)
- {
- LED3=~LED3;
- }
- }
- if(K4==0)
- {
- while(K4==0)
- {
- LED4=~LED4;
- }
- }
- DelayMS(10);
- }
- }
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