/* Signal module for Railroad HandCar arcade game */

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/* Includes                                       */
/**************************************************/

#include <stdio.h>
#include <ME218_C32.h>

#include <ADS12.h>
#include <PWMS12.h>

#include "Signaling.h"
#include "Timing.h"
#include "GamePlay.h"
                     
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/* Reference Program Variables                    */
/**************************************************/

extern unsigned char VillainPos;

/**************************************************/
/* Functions                                      */
/**************************************************/

/* Set DDR port T byte to input, M byte to output */
/* Set port AD I/O bits and initialize PWM module */

void InitializePorts(void) {
  DDRT = BYTELO;
  DDRM = BYTEHI;
  
  PTM = BYTELO;
    
  ADS12_Init("OOOOOOOA");
  PTAD |= BIT1HI; 
  PWMS12_Init();
}

/* Pulse enable (port M0) to signal jumping motor */

				
void PulseEnable(void) {
  PTM |= BIT0HI;	
  Wait(100);
  PTM &= BIT0LO;
}

/* Set start indicator LED ON (State != 0) or OFF */

void ReadyLED(char State) {
  if (State)
    PTM |= BIT4HI;
  else
    PTM &= BIT4LO; 
}

/* Check whether penny inserted; LO means present */

char CheckForPenny(void) {
  return !(PTT & BIT7HI);
}

/* Sound the game horn at 'OnTime' amount of time */

void SoundHorn(unsigned int OnTime) {
  PTAD &= BIT1LO;
  Wait(OnTime);
  PTAD |= BIT1HI;  
}

/* Beep (sound game chime) at indicated frequency */

void Beep(char NumTimes) {
  char i;
  
  for (i = 0; i < NumTimes; i++) {
    SoundHorn(BEEP_TIME);
    Wait(BEEP_TIME);
  }
}
  
/* Check whether 'start' button has been pressed  */

char CheckStartButton(void) {
 return !(PTT & BIT3HI); 
}

/* Get the current handle position (range 0-1023) */

short HandlePosition(void) {
  return ADS12_ReadADPin(0);
}

/* Set port M5 HI or LO to direct puppet handpump */

void Pump(char Direction) {
  if (Direction == UP)
    PTM |= BIT5HI; /* HI for UP */
  else
    PTM &= BIT5LO; /* LO for DN */    
}

/* Set PWM scroll speed on port T0 & adjust range */

void SetScrollSpeed(unsigned int Speed) {
  unsigned int Duty = 0;
  
  if (Speed) Duty = Speed / 2 + 25;
  PWMS12_SetDuty((unsigned char) Duty, PWMS12_CHAN0);
}

/* Place villain within servo range from position */

void PlaceVillain(unsigned char Pos) {  
  PWMS12_SetDuty((unsigned char) Pos, PWMS12_CHAN1);
}

/* Check whether the hand car is over an obstacle */

char AtObstacle(void) {
  return !(PTT & BIT6HI);   
}

/* Set port M1 HI or LO to direct motor direction */

void Jump(char Direction) {      
  if (Direction == UP)
    PTM |= BIT1HI; /* HI for UP */
  else
    PTM &= BIT1LO; /* LO for DN */

  PulseEnable();
} 

/* Check whether a jump or landing event occurred */

char GetJumpEvent(void) {
  static char OldState = DN;
  char State;
  
  if ((PTT & BIT4HI) || (PTT & BIT5HI))
    State = DN;
  else
    State = UP;
  
  if (State == OldState)
    return NO_EVENT;
  
  OldState = State;
  
  if(State == UP) {
    printf("Jumped\r\n");
    return JUMPED;
  }
  printf("Landed\r\n");
  return LANDED;
}

/* Set port M2 LO to vibrate handle for collision */

void VibrateHandle(char Signal) {
  if(Signal == ON)
    PTM |= BIT2HI;
  else 
    PTM &= BIT2LO;      
}

/* Dispense SWAG for the specified length of time */

void DispenseSWAG(void) {   
  printf("Dispensing Cheez Whiz.\n\r"); 

  PTM |= BIT3HI;
  Wait(SWAG_TIME);
  PTM &= BIT3LO;
}