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- #include <reg52.h>
- #define uchar unsigned char
- #define uint unsigned int
- sbit K1 = P3^7;
- uchar i,Second_Counts,Key_Flag_Idx;
- bit Key_State;
- uchar DSY_CODE[]=
- {
- 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f
- };
- void DelayMS(uint ms)
- {
- uchar t;
- while(ms--)
- {
- for(t=0;t<120;t++);
- }
- }
- void Key_Event_Handle()
- {
- if(Key_State == 0)
- {
- Key_Flag_Idx=(Key_Flag_Idx+1)%3;
- switch(Key_Flag_Idx)
- {
- case 1:EA=1;ET0=1;TR0=1;break;
- case 2:EA=0;ET0=0;TR0=0;break;
- case 0:P0=0x3f;P2=0x3f;i=0;Second_Counts=0;
- }
- }
- }
- void main()
- {
- P0 = 0x3f;
- P2 = 0x3f;
- i = 0;
- Second_Counts = 0;
- Key_State = 1;
- TMOD = 0x01;
- TH0 = (65535-50000)/256;
- TL0 = (65535-50000)%256;
- while(1)
- {
- if(Key_State != K1)
- {
- DelayMS(10);
- Key_State = K1;
- Key_Event_Handle();
- }
- }
- }
- void DSY_Refresh() interrupt 1
- {
- TH0 = (65535-50000)/256;
- TL0 = (65535-50000)%256;
- if(++i==2)
- {
- i = 0;
- ++Second_Counts;
- P0 = DSY_CODE[Second_Counts/10];
- P2 = DSY_CODE[Second_Counts%10];
- if(Second_Counts == 100) Second_Counts = 0;
- }
- }
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