65.基于AT89C51单片机的MAX7221控制数码管动态显示设计.zip

/*************** writer:shopping.w ******************/ #include <reg52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int sbit DIN = P2^0; sbit CSB = P2^1; sbit CLK = P2^2; uchar Disp_Buffer[8]= { 2,0,0,9,10,8,10,9 }; void DelayMS(uint x) { uchar t; while(x--) { for(t=120;t>0;t--); } } void Write(uchar Addr,uchar Dat) { uchar i; CSB = 0; for(i=0;i<8;i++) { CLK = 0; Addr <<= 1; DIN = CY; CLK = 1; _nop_(); _nop_(); CLK = 0; } for(i=0;i<8;i++) { CLK = 0; Dat <<= 1; DIN = CY; CLK = 1; _nop_(); _nop_(); CLK = 0; } CSB = 1; } void Initialise() { Write(0x09,0xff); Write(0x0a,0x07); Write(0x0b,0x07); Write(0x0c,0x01); } void main() { uchar i; Initialise(); DelayMS(1); for(i=0;i<8;i++) { Write(i+1,Disp_Buffer[i]); } while(1); }