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#include "tank.h"
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#define DEBUG
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#define  TXo PIN_A3           // To the transmitter modulator
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#include "AX25.c"             // podprogram pro prenos telemetrie
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unsigned int8 sensors;        // pomocna promenna pro cteni cidel na caru
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unsigned int8 line;           // na ktere strane byla detekovana cara
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unsigned int8 speed;          // rychlost zataceni
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unsigned int8 rovinka;        // pocitadlo pro zjisteni rovneho useku
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unsigned int8 last;           // kde byla cara, kdyz byly minule cidla mimo
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unsigned int8 movement;       // obsahuje aktualni smer zataceni
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unsigned int8 dira;           // pocita dobu po kterou je ztracena cara
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// Konstanty pro dynamiku pohybu
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#define T_DIRA       120      // po jakem case zataceni se detekuje dira
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#define INC_SPEED    1        // prirustek rychlosti v jednom kroku
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#define FW_POMALU    230      // trochu mimo caru vnitrni pas
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#define FW_ZATACKA   240      // rychlost vnejsiho kola pri zataceni
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#define FW_STREDNE   240      // trochu mimo caru vnejsi pas
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#define COUVANI      750      // couvnuti zpet na caru, po detekci diry
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#define PRES_DIRU    300
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#define MAX_ROVINKA  (255-FW_STREDNE)
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#define TRESHOLD     6        // rozhodovaci uroven komparatoru, 0xF = 0.75*Vdd
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#define BUMPER_TRESHOLD 128
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#define CIK_CAK      30000
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#define T_CIHLA      50      // perioda detekce cihly
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//motory            //Napred vypnout potom zapnout!
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#define FR         output_low(PIN_B5); output_high(PIN_B4)  // Vpred
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#define FL         output_low(PIN_B7); output_high(PIN_B6)
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#define BR         output_low(PIN_B4); output_high(PIN_B5)  // Vzad
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#define BL         output_low(PIN_B6); output_high(PIN_B7)
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#define STOPR      output_low(PIN_B4);output_low(PIN_B5)    // Zastav
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#define STOPL      output_low(PIN_B6);output_low(PIN_B7)
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#define L 0b10  // left
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#define R 0b01  // right
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#define S 0b11  // straight
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//cidla
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#define RSENSOR    C2OUT      // Senzory na caru
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#define LSENSOR    C1OUT
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#define BUMPER     PIN_A4     // Senzor na cihlu
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#define DIAG_SERVO      PIN_B3   // Propojka pro diagnosticky mod
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#define DIAG_SENSORS    PIN_B2   // Propojka pro diagnosticky mod
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#DEFINE SOUND_HI   PIN_A6     // komplementarni vystupy pro piezo pipak
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#DEFINE SOUND_LO   PIN_A7
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char AXstring[40];   // Buffer pro prenos telemetrie
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// makro pro PWM
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#define GO(motor, direction, power) if(get_timer0()<=power) \
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{direction##motor;} else {stop##motor;}
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#int_TIMER2
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void TIMER2_isr()
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{
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   if (speed<255) speed+=INC_SPEED;
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   if (rovinka<MAX_ROVINKA) rovinka++;
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   if (dira<=T_DIRA) dira++;
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}
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// Primitivni Pipani
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void beep(unsigned int16 period, unsigned int16 length)
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{
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   unsigned int16 nn;
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   for(nn=length; nn>0; nn--)
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   {
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     output_high(SOUND_HI);output_low(SOUND_LO);
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     delay_us(period);
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     output_high(SOUND_LO);output_low(SOUND_HI);
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     delay_us(period);
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   }
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}
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/******************************************************************************/
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void diagnostika()
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{
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   unsigned int16 n;
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   while (input(DIAG_SERVO))   // Propojka, ktera spousti diagnostiku
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   {
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      for (n=500; n<800; n+=100)
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      {
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         beep(n,n); //beep UP
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      };
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      Delay_ms(1000);
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      //zastav vse
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      STOPL; STOPR;
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      //pravy pas
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      FR; Delay_ms(1000); STOPR; Delay_ms(1000);
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      BR; Delay_ms(1000); STOPR; Delay_ms(1000);
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      Beep(880,100); Delay_ms(1000);
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      //levy pas
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      FL; Delay_ms(1000); STOPL; Delay_ms(1000);
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      BL; Delay_ms(1000); STOPL; Delay_ms(1000);
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      Beep(880,100); Delay_ms(1000);
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      //oba pasy
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      FL; FR; Delay_ms(1000); STOPL; STOPR; Delay_ms(1000);
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      BL; BR; Delay_ms(1000); STOPL; STOPR; Delay_ms(1000);
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   };
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   while (input(DIAG_SENSORS))         // spusteni diagnostiky cidel
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   {
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      if (RSENSOR) beep(900,500);
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      if (LSENSOR) beep(800,500);
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      if ((read_adc(ADC_READ_ONLY)<BUMPER_TRESHOLD)) beep(1000,500);
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   };
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}
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///////////////////////////////////////////////////////////////////////////////
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void cikcak()
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{
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unsigned int16 n;
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sem1:
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   n=CIK_CAK;
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	while (0==RSENSOR||LSENSOR)       // zkontroluj caru
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	{
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		if (n==CIK_CAK)							// zmen smer zataceni
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		{
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			n=0;
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			switch(movement)
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			{
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			case L:
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						FL;BR;
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						movement=R;
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					break;
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			case R:
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						FR;BL;
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						movement=L;
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					break;
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         case S:
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				     FL;BR;
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				     movement=R;
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                 n=CIK_CAK/2;
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			      break;
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			}
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		}
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		n++;
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	}
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	STOPL;STOPR;
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   line = RSENSOR;         // cteni senzoru na caru
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   line |= LSENSOR << 1;
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   if (line==0) goto sem1;
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   												// nasli jsme caru
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	line=S;
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}
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///////////////////////////////////////////////////////////////////////////////
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void objizdka()                     // objede cihlu
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{
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unsigned int16 n;
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	BL;BR;Delay_ms(150);
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	STOPR;STOPL;
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	beep(900,1000);
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  // movement=S;
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  // cikcak();
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   BR; FL; Delay_ms(270);           // otoc se 70° do prava
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   FR; FL; Delay_ms(700);           // popojed rovne
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   BL; Delay_ms(30);               // otoc se 90° do leva
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   STOPL; FR; Delay_ms(500);
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   FR; FL;  Delay_ms(100);           // popojed rovne na slepo
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   for(n=40000;n>0;n--)               // popojed rovne ale kontroluj caru
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   {
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      line = RSENSOR;         // cteni senzoru na caru
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      line |= LSENSOR << 1;
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      if (line!=0) {Delay_ms(150); break;}
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//     Delay_ms(1);
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   }
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   BR; FL;                             // otoc se 60° do prava
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   for(n=40000;n>0;n--)
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   {
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      line = RSENSOR;         // cteni senzoru na caru
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      line |= LSENSOR << 1;
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      if (line!=0) break;
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//      Delay_ms(1);
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   }
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   STOPR; STOPL;
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   movement=L; //R;
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   cikcak();
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   dira=0;
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}
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///////////////////////////////////////////////////////////////////////////////
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void prejeddiru()                    // vyresi diru
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{
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unsigned int16 n;
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unsigned int8 speed_dira;
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   STOPL;STOPR;
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   speed_dira=speed;
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   beep(1000,500);
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   switch (movement)                            //vrat se zpet na caru
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   {
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   case L:
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         for (n=COUVANI;n>0;n--) {GO(R,B,speed_dira); Delay_ms(1);}
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         STOPL;STOPR;
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      break;
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   case R:
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         for (n=COUVANI;n>0;n--) {GO(L,B,speed_dira); Delay_ms(1);}
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         STOPL;STOPR;
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      break;
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   case S:
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         goto sem;
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      break;
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   }
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   beep(1000,500);
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   /*line=0;
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   FR; BL; Delay_ms(400);                 // otoc se na caru
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   beep(1000,500);
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   while(line==0)
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   {
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      line = RSENSOR;         // cteni senzoru na caru
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      line |= LSENSOR << 1;
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   }
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   FL;BR; Delay_ms(60);       // zabrzdi
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   STOPL; STOPR;
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   FL; BR; Delay_ms(700);     // otacka 180 deg
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   STOPL; STOPR;*/
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   FR;FL;                     //popojed rovne
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   for(n=PRES_DIRU;n>0;n--)
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   {
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      line = RSENSOR;         // cteni senzoru na caru
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      line |= LSENSOR << 1;
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      if (line!=0) break;
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      Delay_ms(1);
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   }
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sem:
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   STOPL; STOPR;
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   movement=S;
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   cikcak();                                    // najdi caru
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   dira=0;
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}
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///////////////////////////////////////////////////////////////////////////////
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void main()
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{
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   unsigned int16 n; // pro FOR
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   STOPL; STOPR;     // prepne vystupy na ovladani motoru na output a zastavi
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   setup_oscillator(OSC_4MHZ|OSC_INTRC);     // 4 MHz interni RC oscilator
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   port_b_pullups(TRUE);      // pullups pro piano na diagnostiku
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   setup_spi(FALSE);
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   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);  // Casovac pro PWM
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   setup_timer_2(T2_DIV_BY_4,255,10);    // Casovac pro regulaci
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                                         // preruseni kazdych 10ms
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   setup_adc_ports(sAN2|VSS_VDD);      // nastaveni A/D prevodniku pro naraznik
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   setup_adc(ADC_CLOCK_INTERNAL);
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   set_adc_channel(2);
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   setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);   // Casovac pro naraznik
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   setup_ccp1(CCP_COMPARE_RESET_TIMER);
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   CCP_1=(2^10)-1;                        // prevod kazdou 1ms
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   setup_comparator(A0_VR_A1_VR);   // inicializace komparatoru pro cidla cary
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   setup_vref(VREF_HIGH|TRESHOLD);        // 32 kroku od 0.25 do 0.75 Vdd
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   Beep(1000,200);     //double beep
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   Delay_ms(50);
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   Beep(1000,200);
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   Delay_ms(1000);      // 1s
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         // povoleni rizeni rychlosti zataceni pres preruseni
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   enable_interrupts(INT_TIMER2);
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   enable_interrupts(GLOBAL);
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/*---------------------------------------------------------------------------*/
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   sensors=S;
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   line=S;
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   last=S;
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   movement=S;
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   speed=FW_POMALU;
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   diagnostika();
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   //cikcak();     // toc se, abys nasel caru
286
   Delay_ms(500);
287
   Beep(1000,200);
288
   Delay_ms(500);
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290
   while(true)       // hlavni smycka (jizda podle cary)
291
   {
292
      sensors = RSENSOR;         // cteni senzoru na caru
293
      sensors |= LSENSOR << 1;
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      if ((read_adc(ADC_READ_ONLY)<BUMPER_TRESHOLD) && (dira<=T_CIHLA)) objizdka();
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      switch (sensors)  // zatacej podle toho, kde vidis caru
298
      {
299
         case S:                          // rovne
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            FL; FR;  // pokud se jede dlouho rovne, tak pridej
301
            dira=0;
302
            movement=S;
303
            continue;
304
         case L:                          // trochu vlevo
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            GO(L, F, FW_POMALU+rovinka); GO(R, F, FW_STREDNE+rovinka);
306
            line=L;
307
            dira=0;
308
            movement=L;
309
            continue;
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         case R:                          // trochu vpravo
311
            GO(R, F, FW_POMALU+rovinka); GO(L, F, FW_STREDNE+rovinka);
312
            line=R;
313
            dira=0;
314
            movement=R;
315
            continue;
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         default:       // kdyz jsou obe cidla mimo caru, tak pokracuj dal
317
      }
318
   rovinka=0;
319
      if (dira>=T_DIRA) prejeddiru();
320
      if (last!=line)     // pokud si prejel caru z jedne strany na druhou stranu, tak zabrzdi
321
      {
322
         last=line;
323
         speed=FW_ZATACKA;
324
      }
325
      if (L==line)  // kdyz jsou obe cidla mimo caru, zatoc na caru
326
      {
327
         STOPL;
328
         GO(R, F, speed);
329
         movement=L;
330
      }
331
      else
332
      {
333
         STOPR;
334
         GO(L, F, speed);
335
         movement=R;
336
      }
337
   } // while(true)
338
}
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