74hc595驱动串行led显示

//一个74hc595位移寄存器驱动三极管驱动led位，//两个74hc595驱动led段，方式位5位x8段x2=10个数码管//5分频，每次扫描时间位1.25ms//定义特殊符号#define nul 0xf#define qc 0xc#define qb 0xb#define q_ 0xa#define q__ 0xd#define q___ 0xe#define qp 0x10#define qe 0x11#define qj 0x12#define qn 0x13#define qf 0x14#define qa 0x15#define qr 0x16#define qd 0x17#define qu 0x18#define ql 0x19#define qh 0x1a#define qwen 0x1b#define qt 0x1c#define qla 0x1d#define qlb 0x1e#define qlc 0x1f#define qld 0x20#define qle 0x21#define qlf 0x22#define qlg 0x23#define qldp 0x24//显示段信息，不同led排列组合的段信息只需更改8个数值即可。//因此，该定义具有通用性。// 显示 //  -d 20// |c 40 |e 10//  - g  80  // |b 2 |f 4//  _a1 .dp 8#define pa 1#define pb 2#define pc 0x40#define pd 0x20#define pe 0x10#define pf 4 #define pg 0x80#define pdp 8//--------------#define l0 pdp+pg#define l1 255-pf-pe#define l2 pdp+pc+pf#define l3 pdp+pc+pb#define l4 pdp+pa+pb+pd#define l5 pdp+pb+pe#define l6 pdp+pe#define l7 pdp+pc+pg+pb+pa#define l8 pdp#define l9 pdp+pb#define la pdp+pa#define lb pdp+pd+pe#define lc pdp+pg+pe+pf#define ld pdp+pc+pd#define le pdp+pe+pf#define lf pdp+pe+pf+pa#define l_ 255-pg#define lnul 255#define ll pdp+pg+pd+pf+pe#define lp pdp+pa+pf#define lt pdp+pd+pe+pf#define lr pdp+pe+pf+pg+pa#define ln pdp+pg+pa#define lh pdp+pd+pe+pa#define ly pdp+pb+pd#define lu pdp+pg+pd#define l__ pdp+pg+pb+pc+pe+pf#define l___ l__-pg#define l_1 255-pa#define l_2 255-pa-pg#define lj 255-(pe+pf+pa)#define lwen 255-(pd+pe+pg+pb)#define lall 0#define lla 255-pa#define llb 255-pb#define llc 255-pc#define lld 255-pd#define lle 255-pe#define llf 255-pf#define llg 255-pg#define lldp 255-pdp//串行送出的位信息，目前是10位led显示。unsigned char code un_dig[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb};//串行送出的短信息。unsigned char code un_disp[]={l0,l1,l2,l3,l4,l5,l6,l7,l8,l9,l_,lb,lc,l__,l___,lnul,lp,le,lj,ln,lf,la,lr,ld,lu,ll,lh,lwen,lt,lla,llb,llc,lld,lle,llf,llg,lldp,lnul}; sbit d_clk=P0^0;  //移位时钟sbit d_dat=P0^1;  //移位数据sbit d_st=P0^2;   //移位锁定unsigned char dig;   //位扫描计数器unsigned char d[10];       //显示缓冲//送出8位串行数据void out_disp(unsigned char dd) { unsigned char i; for (i=0;i<8;i++) {  if (dd&1) d_dat=1; else d_dat=0;  d_clk=0;  dd>>=1;  d_clk=1; }}//控制小数点和闪烁，显示数据|0x040表示有小数点；显示数据|0x80表示闪烁。void out_displ(unsigned char dd) { if (dd>=0x80) {  if (s001>flash_time) {out_disp(0xff);return;} } dd&=0x7f; if (dd>=0x40) {  dd=un_disp[dd&0x3f]^pdp; } else dd=un_disp[dd]; out_disp(dd);}  unsigned int s001; //闪烁时间参考void int_t0(void) interrupt 1 { unsigned char dd; TL0=TL0+30;TH0=0xfb; //800 time++; if ((++s001)>=800) s001=0; // 显示  if ((++dig)>4) dig=0; d_st=0; dd=d[dig+5]; out_displ(dd); dd=d[dig]; out_displ(dd); out_disp(un_dig[dig]); d_st=1;}void main(void) { unsigned char i; TMOD=0x1; TR0=ET0=1; EA=1; for (i=0;i<10;i++) d[i]=i; //display test while (1) {}}