/* FLASH.C - LED Flasher for Phytecs Rapid Development Kits                   */
#include <stdio.h>
#include <reg51.h>                     /* include 8051 header file            */
sfr CKCON = 0x8E;		// clock control register 80c320

void V24OutB0 (char);
char V24InB (void);
void V24OutW(int val);
#define WORD unsigned int

void V24Init (void);


sbit lichtschranke1 = P1^1;
sbit lichtschranke2 = P1^2;
/* sbit test = P1^3;

char rennfreigabe,rennenaktiv1,rennenaktiv2;
int counter1,counter2;
int ls1counter,ls2counter; // Für Genauigkeit beim Fahren in die Lichtschranke 

void timerstart0(WORD wert) {
	TH0=wert >> 8;
	TL0=wert & 0xff;
	TMOD=((TMOD & 0xf1) | 0x01); 
	ET0=1;
	TR0=1;
}

void timerstart1(WORD wert) { 
	TH1=wert >> 8;
	TL1=wert & 0xff;
	TMOD=(( TMOD & 0x1f) | 0x10);
        ET1=1;
	TR1=1;
}

void zeitsenden (int counter,char nr){
char hi, lo;
   hi = (char)counter>>8;
   lo = (char)counter;
   V24OutB0(nr);
   V24OutB0(hi);
   V24OutB0(lo);
}

void timerintfkt () interrupt 3 { 
    timerstart1(15535);                   // timerregister neu laden
   /*if (test) 
      test=0;
   else
      test=1; */         
   if (ls1counter>0) ls1counter--;
   if (ls2counter>0) ls2counter--; 
	if (rennfreigabe == 1) {
        	if (rennenaktiv1 == 1) {
			counter1 ++;
		}
		if (rennenaktiv2 == 1) {
			counter2 ++;
		}
		if (ls1counter==0 && lichtschranke1 == 0) {    // fahrer in LS
			if (rennenaktiv1 == 0){
				rennenaktiv1 = 1;
                                ls1counter=300;
			} else {
		       		rennenaktiv1 = 0;
				ls1counter=300;
			      	printf("1,%u\n",counter1);
			}   
		}

		if (ls2counter==0 && lichtschranke2 == 0) {
			if (rennenaktiv2 == 0){
				rennenaktiv2 = 1;
				ls2counter=300;
			} else {
		       		rennenaktiv2 = 0;
				ls2counter=300;
			      	printf("2,%u\n",counter2);
			}   
		}
	}
}


void rennenstart () {
	rennfreigabe = 1;
	counter1 = 0;
	counter2 = 0;
	ls1counter = 0;
	ls2counter = 0;
	rennenaktiv1 = 0;
	rennenaktiv2 = 0;
}

void rennenstop () {
    rennfreigabe = 0;
    V24OutW (counter1);
    V24OutW (counter2);
    printf("Rennen gestoppt\n");
    printf("%u\n%u\n",counter1,counter2);	
}
/*
void T1Run(unsigned int wert){         // starte timer 1            
   TH1=wert >> 8;
   TL1=wert & 0xff;                    // mode1, 16 bit timer       
   TMOD=((TMOD & 0x1f) | 0x10);        // xxxx 0001                 
   ET1=1;                              // enable timer0_interr.     
   TR1=1;                              // turn control on           
}
void Timer1(void) interrupt 3 {      // interruptservice timer1
   T1Run(15535);                     // 50000inc/5MHz         
   if (test) 
      test=0;
   else
      test=1;          
}
*/

void main () {
	char command; 		//Variable für Befehle von PC
        lichtschranke1=lichtschranke2=1;
    	timerstart1(15535); 	//ist für Hundert Hz	
        CKCON=0xFF;             // timerbetriebsmodus setzen
   	V24Init(); 		//Initialisierung der Schnittstelle
	EA=1;		        // enable all interrupts
	printf("Hallo");
    while(1) {    
        command = V24InB ();
	switch (command){  	//f = Kommando Freigabe,oder Reset
	case 'f': rennenstart(); printf("Rennen gestartet\n");
                  break;
        case 's': rennenstop();   //s = Stop
                  break;
        } 
    }
} 


--------------------------------------------------------------------------------------------------------------------


.../*char V24InB(void){
char ic;
   while (!RI)		// Wait here for received character
     ;
   ic = SBUF0;
   RI=0;          	// Get ready for next character
   if (ic != CNTLQ && ic != CNTLS)
      return (ic);   //	return new character 
   return(0); 	      
}

void V24OutB0(char b){
   SBUF0=b;	 			// Copy char to SBUF 
   while (!TI) 		// Wait here until TI bit set
     ;
   TI=0; 				// Get ready for next character
}
void V24OutW(int val){
   SBUF0=val;           // Copy hi order  byte to SBUF 
   while (!TI) 		// Wait here until TI bit set
     ;
   TI=0; 				// Get ready for next character
   SBUF0=val>>8;        // Copy low byte to SBUF 
   while (!TI) 		// Wait here until TI bit set
     ;
   TI=0; 				// Get ready for next character
}
/*
void V24OutB1(char b){
   SBUF1=b;	 			// Copy char to SBUF1 
   while (!TI1) 		// Wait here until TI bit set
     ;
   TI1=0; 				// Get ready for next character
} */

/*
void V24OutS(char no,char *s){
   if (!no)
   while (*s) {
      V24OutB0(*s);
      s++;
   }  else
   while (*s) {
      V24OutB1(*s);
      s++;
   }
} */...