delay.h

来自「This program is distributed in the hope 」· C头文件 代码 · 共 23 行

/***************************************
 * delay.h
 * 
 * 
 * 
 * 
 ***************************************/

static udelay (int usec){
  TH0 = 0xFF-(unsigned char)(usec*2 >> 8);
  TL0 = 0xFF-(unsigned char)(usec*2 & 0xFF);
  TCON &= ~0x20;
  while(!(TCON & 0x20));
}

#define __timeafter (TCON & 0x20)

static timeafter(int usec){
  TH0 = 0xFF-(unsigned char)(usec*2 >> 8);
  TL0 = 0xFF-(unsigned char)(usec*2 & 0xFF);
  TCON &=~0x20;
}