muticom.ccc

基于89c2051开发的ptr8000一对多无线通信程序.

#include <reg51.h>
#include <stdio.h>
unsigned char startframe[4]={0,0,0,0},comxrb[4]={1,1,1,1},lastcomxrb[4]={1,1,1,1};
unsigned char TLV=0xb0;      //Now is 16 times of baud,0xc0; //for 18432000,4 times baudrate,
unsigned char THV=0xff;      //                        0xfe; if 8times baudrate it's 0x60 and 0xff respectively.
unsigned char comxbuffsp[4]={0,0,0,0},comxbuffs[4][2],comxbuffr[4][2],comxbuffrp[4]={0,0,0,0};
unsigned short SECTICKS=19200; //4800; //65536/(65536-(THV*256+TLV))*18;
unsigned short HALFSECTICKS=9600; //2400;
unsigned char rbuff[2],sbuff[4];
unsigned char rbuffp=0;
unsigned char triggle=0,chno=0,ensend=0,rest[4];
//unsigned char ticks1=0,ticks2=0,ticksl2=0,ticksh2=0,ticks3;//,numberofzero=0,numberofone=16;
unsigned char temptl0,tempth0;
unsigned char comxbitbuffp[4]={0,0,0,0};
unsigned short filterB[4]={0xffff,0xffff,0xffff,0xffff},count=0,comxbitbuff[4];
sbit P32 = P3^2;
sbit COMX1R=P3^0;
sbit COMX1S=P3^1;
sbit COMX2R=P1^2;
sbit COMX2S=P1^3;
sbit COMX3R=P1^4;
sbit COMX3S=P1^5;
sbit COMX4R=P1^6;
sbit COMX4S=P1^7;
//enum struct[4]={"COMX1R","COMX2R","COMX3R","COMX4R"};
void delay()
{
 unsigned short i,j;
 for(i=0;i<30;i++) j=i;
}
void e0int() interrupt 0
{
 P1=P1 ^ 0x80; // Feed watchdog.
 //ticks3++;
}
void e1int() interrupt 2
{
 //ticks1++;
}
void t0int() interrupt 1
{
 // unsigned char i;
 temptl0=TL0;
 tempth0=TH0;
 TH0=THV+tempth0;
 TL0=TLV+temptl0+10;
 //if(!(filterB&0x8000)) numberofzero--;
 for(chno=0;chno<1;chno++)
 {
 filterB[chno]<<=1;
 filterB[chno]&=0xfffe;
 switch(chno)
 {
  case 0:
         filterB[chno]|=COMX1R;
		 break;
  case 1:
         filterB[chno]|=COMX2R;
		 break;
  case 2:
         filterB[chno]|=COMX3R;
		 break;
  case 3:
         filterB[chno]|=COMX4R;
		 break;
  default: break;
 }
 //if(!(filterB&1)) numberofzero++;
 switch (filterB[chno]&0x3f)
 {
  case 0x3f:
            comxrb[chno]=1;
		    break;
  case 0:
            comxrb[chno]=0;
            if((!startframe[chno]) && (!(filterB[chno]&0xff))) // && (lastcom2rb) && (numberofzero>=8))
		    {
			 startframe[chno]=1;
			 comxbitbuffp[chno]=0;
			 rest[chno]=count&0xf;
			}
			break;
  default:
            break;
 }
 lastcomxrb[chno]=comxrb[chno];
 if(startframe[chno] && ((count&0xf) == rest[chno]))
 {
  comxbitbuff[chno]>>=1;
  comxbitbuff[chno]&=0xfeff;
  if(comxrb[chno]) comxbitbuff[chno]|=0x0100;
  comxbitbuffp[chno]++;
  if(comxbitbuffp[chno]==10)
  {
   startframe[chno]=0;
   if(comxbitbuff[chno]&0x100)
   {
    comxbuffr[chno][comxbuffrp[chno]]=comxbitbuff[chno];
	sbuff[chno]=comxbitbuff[chno];
    if(++comxbuffrp[chno]==2) comxbuffrp[chno]=0;
   }
  }
 }
 }
 count++;
 if(count == SECTICKS)
 {
  count=0;
  triggle=1;
 }
}
void comint() interrupt 4
{
 if(RI)
 {
  RI=0;
  rbuff[rbuffp]=SBUF;
  rbuffp++;
  if(rbuffp == 4) rbuffp=0;
 }
}
void main (void)
{
 unsigned char i;
 SCON  = 0x50;		        /* SCON: mode 1, 8-bit UART, enable rcvr      */
 TMOD |= 0x21;               /* TMOD: timer 1, mode 2, 8-bit reload        */
 TH1   = 0xd8;                /* TH1:  reload value for 1200 baud @ 184320000MHz   */
 TR1   = 1;                  /* TR1:  timer 1 run                          */
 IT1   = 1;
 IT0   = 1;
 TI    = 1;                  /* TI:   set TI to send first char of UART    */
 TR0   = 1;
 IE    = 0x87;
 while (1)
 {
  if (triggle==1)
  {
   P32=0;
   for(i=0;i<4;i++) putchar(sbuff[i]);
   //putchar(temptl0);
   triggle=0;
   P32=1;
  }
  delay();
 }
}