/* 
   Remote controller for a car. 

   When a touch button is pressed/released the infrared transmitter is
   used to send a message to the car signaling the state change.

   Last updated 4.3.01.
 */

#include "RCX_String.h"
#include "RCX_Control.h"
#include "H8.h" 
#include "Time.h"
#include "LCD.h"
#include "Battery.h"
#include "Buttons.h"

/* Sensors */
#include "InputPorts.h"

/* State of the two touch buttons on the remote controller */
#define LeftPressed    1
#define LeftReleased   2
#define RightPressed   3
#define RightReleased  4

#define TouchThreshold 950

byte Touch1State( void )
{
  return ( ( Port1Raw() > TouchThreshold ) ? FALSE : TRUE );
}

byte Touch3State( void )
{
  return ( ( Port3Raw() > TouchThreshold ) ? FALSE : TRUE );
}

/* Actuators */
#include "IR.h"

void Transmit( word m )
{
  IRTransmit(0,m);
}

void _start( void ) 
{  
  byte Touch1, PreviousTouch1, 
       Touch3, PreviousTouch3;

  ButtonsInit();
  while ( ! Running ){
    lcd_show_int16(BatteryLevel());
    BusyPauseMS(300);
  }

  IRInit(); 
  IREnableInterrupts();

  PreviousTouch1 = Touch1State(); 
  PreviousTouch3 = Touch3State();

  while ( Running ) {

     lcd_show_int16(Touch1State()); lcd_show_digit(Touch3State());

     Touch1 = Touch1State(); 
     if ( Touch1 && ( ! PreviousTouch1 ) ) {
        PreviousTouch1 = TRUE;
        Transmit(LeftPressed);
     } else
     if ( ( ! Touch1 ) && PreviousTouch1 ) {
        PreviousTouch1 = FALSE;
        Transmit(LeftReleased);
     }

     Touch3 = Touch3State();
     if ( Touch3 && ( ! PreviousTouch3 ) ) {
        PreviousTouch3 = TRUE;
        Transmit(RightPressed);
     } else
     if ( ( ! Touch3 ) && PreviousTouch3 ) {
        PreviousTouch3 = FALSE;
        Transmit(RightReleased);
     }

  }

  IRDisableInterrupts();
  IRClose();

  RCX_Reset();

}