uart0.c

来自「51单片机上网的引导代码」· C语言 代码 · 共 55 行

#include "REG516.H"
#include "def.h"

extern WORD data Rec_length;
extern BYTE data Rec_sum;
//------------------------------
void initSERIAL(void)
{	
	///////////////////////////////////////////////////////////////////////////
	//-if you need isd(in system debugger)you need add the list code in your main
	//--------------add for serial bebug s0----------zhzhl-------
	SCON  = 0x50;      /* enable serial uart & receiver  s0,mode 1    */
	PCON = PCON | 0x80;

    TMOD|=0X20; //TIMER1: MODE 2, ;
	TH1=247;    //32.768M-->18963
	TL1=247;
	TR1=1;     //TIMER1 START;
	//-----------end of s0 initial ----------------------------
	ES=1;
}
//---------------------------------------
void Uart0_print(char *p)
  {
     ES=0;      //disabe uart0 interrupt;
     TI=1;
     while(*p)
       while(TI)
       {
          TI=0;
          SBUF=(*p);
          ++p;
       }
     while(!TI);
	 TI=0;
     ES=1;
  }
//--------------------------------------------------------
void INT_S0(void) interrupt 4
{
   BYTE data tmp;
   if(RI)
   {
     RI=0;
     tmp=SBUF;
     *((BYTE xdata *)Rec_length++)=tmp;
	 Rec_sum+=tmp;
	// TI=0;
	// SBUF=tmp;
	// while(!TI);
   }
   else
     TI=0;
}