大侠来救命啊

只看该作者 · 2011-3-22 21:56

本帖最后由相信哥咯于 2011-3-22 22:00 编辑

#include <pic.h>
#define SH RB0
#define DS RB1
#define ST RB2
char led_7[16]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x39,0x5E,0x79,0x71};
char position[4]={0x7f,0xbf,0xdf,0xef};//
char dis_buff[4]={1,2,3,4};//want to display

//delay time
void delay(void)
{
      unsigned char x,y;
      for(x=0;x<40;x++)
      {
      for(y=0;y<5;y++);
      }
}

//595 send
void send595(unsigned byte)
{
      char i,j;
      for(i=0;i<8;i++)
      {
      SH=0;
      j=byte&1<<i;
      if(j==0)DS=0;
      else DS=1;
      SH=1;
      }
}

//595 out
void send595out()
{
      ST=0;
      asm("nop");
      ST=1;

}

//led in ative
void disled(void)
{
      char i;
      for(i=0;i<2;i++)
      {
            send595(position);
            send595(led_7[dis_buff]);
            send595out();
            delay();
      }
}

//main

void main(void)
{
      TRISB=0x00;
      PORTB=0X00;
while (1)
   {
   disled();
   }

}