main.c

proteus 仿真51单片机串口通讯

#include <reg8253.h>

#define uint unsigned int 
#define uchar unsigned char

uchar table[14]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10,
                 0x20,0x63,0x07,0x23};   //阴极7SEG

uchar send=0x00;

void rs232Ini(void)
{
  TMOD=0x20;
  TH1=0xfd;	//9600
  TL1=0xfd;
  PCON=0x00;
  SCON=0x50;//方式1
  EA=1;
  ES=1;
  TR1=1;
}

void ex_int(void)
{
   EA=1;
   IE0=0;
   EX0=1;
}

void delay(unsigned char n)
{
  uchar i,j,k;
  for(i=0;i<=n;i++)
  {
    for(j=0;j<100;j++)
      for(k=0;k<=250;k++);
  }
}

void main(void)
{
  delay(1);
  rs232Ini();
  ex_int();
  P3_3=0;//led
  while(1)
  {	
  }
}

void ex_button() interrupt 0 using 2
{//	send=5;
    SBUF=send;
    while(!TI);
	TI=0;
	P1_0=!P1_0;
	send++;
	IE0=0;
	if(send>10) send=0;
	delay(1);
	P3_7=!P3_7;//Led
}

void serial_Read(void) interrupt 4 using 3
{
  uint iBuf;
  uchar cBuf;
  if(RI==1)
  {
    P2=1;
    iBuf=SBUF;
    cBuf=iBuf;
    P0=table[cBuf];
	RI=0;
  }
}