/****************************************************************
 文件名: xsa2.c
 功  能：這是在PC機或工控機上運行的程序,用PC機的COM1(0x3f8)口,
         和單片機通訊,波特率1200。通訊步驟:先向單片機發(fā)送一字節(jié)
         地址碼（第九位為1）,再發(fā)送15個字節(jié)數(shù)據(jù)（第九位為0）,然
         后等待接收單片機發(fā)來的43個字節(jié)數(shù)據(jù)，并將接受來的內(nèi)容在
         電腦屏幕上顯示出來.
 版  本：在Turbo C2.0下編譯通過
 ****************************************************************/
#include "dos.h"
void l_table(void);
void comm1();
void transd();
void view1();
int initserial (long int baud_rate,char parity);
union p{
char v[240];
};
union p c;
int i,n,j,t;
long unsigned int r;
unsigned char tbut[20];

main()
{
        comm1();
	initserial (1200,'o');
while(1){
	delay(15);
	outp(0x3f8+3,0x3b); /*按51系列單片機多機通訊要求,發(fā)地址時第九位須為1 */
        while(!((inp(0x3f8+5))&0x20));
        j=1;                /* 地址碼 */
        outp(0x3f8,j);
        outp(0x3f8+3,0x2b); /*按51系列單片機多機通訊要求,發(fā)數(shù)據(jù)時第九位須為0 */
	for(n=0;n<15;n++) { /*發(fā)送15個字節(jié)數(shù)據(jù)   */
        while(!((inp(0x3f8+5))&0x20));
        outp(0x3f8,tbut[n]);
                         }
	com1();
    	l_table();
	clearv2400();
        }
}

com1()
{
	n=0;
	transd();    /*接收43個字節(jié)數(shù)據(jù)   */
}
void transd()
{
	r=0;
        i=0;
	while((i<43)&&(r++<380000)){
	   if((inp(0x3f8+5))&0x01) c.v[i++]=inp(0x3f8);
	   }
}
void l_table(void)
 {
	clrscr();
	l_data_1();
	sleep(10);
}

l_data_1()
 {
	i=0;gotoxy(9,1);view1();
	i=6;gotoxy(9,3);view1();
	i=12;gotoxy(9,5);view1();
	i=18;gotoxy(9,7);view1();
	i=24;gotoxy(9,9);view1();
	i=30;gotoxy(9,11);view1();
	i=36;gotoxy(9,13);view1();
}
void view1()
{
  printf("%4x%4x%4x%4x%4x%4x",c.v[i],c.v[i+1],c.v[i+2],c.v[i+3],
    c.v[i+4],c.v[i+5]);
}
int initserial (long int baud_rate,char parity)
{
union {
  struct {
  unsigned char lobyte;
  unsigned char hibyte;
         }byte;
  struct {
  unsigned baud_factor;
         }whole;
         }bytes;
unsigned char x;
outp(0x3f8+3,0x80);
bytes.whole.baud_factor=1843200L/((long)baud_rate<<4);
outp(0x3f8+0,bytes.byte.lobyte);
outp(0x3f8+1,bytes.byte.hibyte);
outp(0x3f8+4,0x03);
outp(0x3f8+1,0x00);
switch(parity) {
   case 'e':
   case 'E': x=0x2b; break;
   case 'o':
   case 'O': x=0x3b; break;
   case 'n':
   case 'N': x=0x07; break;
   default: return(-1);
   }
outp(0x3f8+3,x);
}
clearv2400()
{
 for (t=0;t<91;t++){
     c.v[t]=0;
     }
}
void comm1()
{
 for (t=0;t<15;t++){
     tbut[t]=0x00;
     }
}