74HC595.zip_74AT.com_74Hc595和AT89C51_74hc595代码51_FGMT_zip

#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; } }