public.c

来自「sst89c54 isp program for user」· C语言 代码 · 共 45 行

#include "public.h"
#include "sst89cxx.h"

///////全局变量
unsigned char Status;
unsigned char idata buf[MAXLEN];
unsigned char idata Buffer[COMMMAXLEN];
unsigned long timerout;


void InitSystem();
void EndSystem();
void Delay(unsigned char num);
////////////////////////////
void InitSystem()
{
      SFCF&=0x03;  //强制映射到0块，上电就开始强制
      SFDT=0x00;
      SFAH=0xab;
      SFAL=0xcd;

}
void EndSystem()
{

	  EA=0;
      TH1=0x00;
      TL1=0x00;
      TMOD=0x00;
      TCON=0x00;
      SCON=0x00;

      SFCF|=0x80;
      SFCF&=0x80;  //可见，而且不能映射,然后跳到0块，中断才可运行
      SFDT=0x00;
      SFAH=0xab;
      SFAL=0xcd;
}

void Delay(unsigned char num)
{
        unsigned char i;
        for(i=0;i<num;i++);
}