#include <stdio.h>
#include <hc11a8.h>
#include <buffalo.h>
 

int main(void)

{

int num1,num2;

unsigned short start1, stop1, start2, stop2, v1, t1, v1rem, t1rem,s,d;

unsigned long vel1,tim1;
 
unsigned char in;

OPTION=ADPU;            //sets ADPU bit in the OPTION register

ADCTL=SCAN|0x10;        //sets AD scan for continuous scan on channels PE1, PE2, PE3





while ((PORTA & PA0)==PA0) //keeps the AD conversions going until PA0 goes low 
{
printf("%d %d %d\n",ADR2,ADR3,ADR4);
}


num1=0; //initializes overflow count for ball blocking the first sensor
num2=0; //initializes overflow count for ball between sensors

TFLG2=TOF;      

start1=TCNT;      //start of time for ball blocking the first sensor   

while ((PORTA & PA0)!=PA0){        //holds this loop while PAO is low
   
   if ((TFLG2 & TOF)==TOF) {       //counts timer overflows
       num1= num1+1;               //
       TFLG2=TOF;                  //
       }
   
   }

stop1=TCNT;            //start of time for ball blocking the first sensor             

if (stop1<start1) num1= num1-1; //removes one overflow count if a complete cycle did not occur 


TFLG2=TOF;

start2=TCNT;          //starts time interval between sensors 

while ((PORTA & (PA1|PA2))==(PA1|PA2)) //sits in timer loop until either sensor 2 or goes low
{

if ((TFLG2 & TOF)==TOF) { 
       num2= num2+1;       //increments overflow counter 
       TFLG2=TOF;
       }
   
   }

stop2=TCNT;

if (stop2 < start2) num2= num2-1;  //removes one overflow count if a complete cycle did not occur

printf("%d %u %u\n\n" , num2, start2, stop2);


vel1=((num1*327680)+(327680*(start1-stop1))/(65536));//scales timer overflows with left over cycles

v1=vel1/10000; //calculates integer component for time in milliseconds 

v1rem=((vel1%10000)*1000)/(10000); //calculates decimal component for time in milliseconds
printf("vel  %d.%d", v1, v1rem);   //combines integer and decimal components for time   

s=140/v1;                          //calculates integer comp ball velocity for 1.683" diameter   
d=((140)%v1)*1000;                 //calculates decimal ball velocity for ball  

printf("%d.%d",s,d);               //displays velocity 



/*tim1=((num2*327680)+(327680*(start2-stop2))/(65536));

t1=tim1/10000; 
4
t1rem=((tim1%10000)*1000;

printf("vel  %d.%d", v1, v1rem);

/*printf("time  %d.%d", t1, t1rem);*/

}