h9b.c

来自「51单片机程序C和汇编」· C语言 代码 · 共 32 行

#include <reg51.h>

sbit LD  = P1^0;
sbit DAT = P1^1;
sbit CLK = P1^2;

unsigned char Read165()
{
  unsigned char i, b;
  
  LD = 0;
  LD = 1;

  b = 0;
  for (i=0; i<8; i++) {
    b >>= 1;
    if (DAT) b |= 0x80;
    CLK = 0;
    CLK = 1;
  }
  return(b);
}

void main()
{
  unsigned char b;
  
  b = Read165();
}