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- #include <reg51.h>
- #include <intrins.h>
- #define uchar unsigned char
- #define uint unsigned int
- #define nop() _nop_()
- uchar t0;
- uchar code SEG_DAT[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
- uchar code BIT_CS[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
-
- sbit SH_CP = P0^0; //移位串行时钟脉冲
- sbit DS = P0^1; //串行数据输入
- sbit ST_CP = P0^2; //数据并行输出锁存器控制脉冲
- //串行输入子程序
- void Serial_Input_595(uchar dat)
- {
- uchar i;
-
- for (i = 0; i < 8; i++)
- {
- if (dat&0x80) //发送高位
- {
- DS = 1;
- }
- else
- {
- DS = 0;
- }
- dat <<= 1; //次高位左移到高位
- SH_CP = 0; //移位时钟线拉低
- nop();
- nop();
- SH_CP = 1; //DS位上的0或1在移位脉冲上升沿被移入595
- nop();
- nop();
- }
- }
- //并行输出子程序
- void Parallel_Output_595()
- {
- ST_CP = 0;
- nop();
- nop();
- ST_CP = 1; //上升沿将数据送到输出锁存器
- nop();
- nop();
- }
- void display(uint count)
- {
- uchar i=0;
- uchar a[6];
- uchar temp;
- a[0]=0;
- a[1]=count/10000;
- a[2]=(count%10000)/1000;
- a[3]=(count%10000%1000)/100;
- a[4]=(count%10000%1000%100)/10;
- a[5]=count%10;
-
- for(i = 0; i <= 5; i++)
- {
- Serial_Input_595(BIT_CS[i]);
- temp=a[i];
- Serial_Input_595(SEG_DAT[temp]);
- Parallel_Output_595();
- }
- }
- void timer0_init(void)
- {
- TMOD=0x01;
- TH0=(65536-50000)/256;
- TL0=(65536-50000)%256;
- EA=1;
- ET0=1;
- TR0=1;
- }
- void timer0(void) interrupt 1
- {
- TH0=(65536-50000)/256;
- TL0=(65536-50000)%256;
- t0++;
- }
- void main(void)
- {
- uint i=0;
- timer0_init();
- while(1)
- {
-
- if(t0==5)
- {
- t0=0;
- i++;
- }
- display(i);
- if(i==65535) i=0;
- }
- }
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