shift.c

来自「本文件包含了使用C语言编写单片机的各种入门程序」· C语言 代码 · 共 25 行

//-------------------------------------
 sbit sda=P0^1;
 sbit scl=P0^0;

code char led[16]={0x11,0xD7,0x32,0x92, /* 0 1 2 3 4 */
                   0xD4,0x98,0x18,0xD3,0x10,0x90, /* 5 6 7 8 9 */
                   0x50,0x1C,0x39,0x16,0x38,0x78};/* A B C D E F*/

//-------------------------------
shift(int k)

{
 int number,b,fbit;
 number=led[k];
 scl=0;
 for(b=0;b<8;b++)
 {
  fbit=number&0x80;
  if(fbit) sda=1;
  else sda=0;
  scl=1;
  number=number<<1;
  scl=0;
  }
}