Lego Interactive Brick Program

//Demonstration Program for Interactive LCD Touch Screen Lego 70455 Interface  

#include <tinyFAT.h>
#include <UTFT.h>
#include <UTFT_tinyFAT.h>
#include <UTouch.h>
#include <LegoTechnic.h>

// Declare which fonts we will be using
extern uint8_t SmallFont[];

UTFT         LEGO_Display(ITDB32S, 38, 39, 40, 41);   // Remember to change the model parameter to suit your display module!
UTFT_tinyFAT LEGO_Files(&LEGO_Display);
UTouch       LEGO_Touch( 6, 5, 4, 3, 2);

LegoTechnic brick(8, 9, 10, 11, 12, 13, 0, 1);

int picsize_x, picsize_y; 

word resource;

// Display locations
int x_HotSpot=85;
int y_HotSpot=163;
int HotSpot_width=202;
int HotSpot_height=72; 

int x_slider = 86;
int y_slider = 173;
int slider_space = 19;
int slider_width = 10;
int slider_height = 10;
  
int x_indicator = 259;
int y_indicator = 59;
int indicator_space = 34;
int indicator_width = 5;
int indicator_height = 5;
  
int x_button = 277;
int y_button = 73;
int button_width = 19;
int button_height = 40; 

int x_output = 86;
int y_output = 140;
int output_space = 107;
int output_width = 200;
int output_height = 10;

void setup()
{
// Initialize LEGO brick 
  brick.Port_Initialize();
  
// Prepare Display 
  LEGO_Display.InitLCD();
  LEGO_Display.clrScr();
  LEGO_Display.setColor(255,255,255);
  LEGO_Display.setFont(SmallFont);
  picsize_x=LEGO_Display.getDisplayXSize();
  picsize_y=LEGO_Display.getDisplayYSize();
  
//  Prepare Touch Screen
 LEGO_Touch.InitTouch(); 
 LEGO_Touch.setPrecision (PREC_MEDIUM);
 LEGO_Display.setBackCol or(0, 0, 255);
  
// LEGO Library has Serial Monitor Functions
  Serial.begin(9600);  
  
//  Load Interface Image
 file.initFAT();
 resource=LEGO_Files.loadBitmap(0, 0, picsize_x, picsize_y, "LEGOPIC.RAW");   
}

void loop()
{
  int hold_value[6]={0,0,0,0,0,0};
  int x,y;
  int Previous_I0, Present_I0;
  int Previous_I1, Present_I1;
  int button_value; 
   
// Draw Screen Elements    
 Sliders();
 Outputs();
 brick.Verbose(LOW);
 UpdateDisplay();  

 Previous_I0 = -1;
 Previous_I1 = -1;  

 while (true)
 {

// Check for change to input values
   Present_I0 = brick.Input_Port(6);
   Present_I1 = brick.Input_Port(7);
   if (Present_I0 != Previous_I0)
     {
       Previous_I0 = Present_I0;
       DrawIndicatorValue(6,Present_I0);
       DrawOutputValue(0,Present_I0);        
     }
   if (Present_I1 != Previous_I1)
     {
       Previous_I1 = Present_I1;
       DrawIndicatorValue(7,Present_I1);
       DrawOutputValue(1,Present_I1);        
     }

// Test for touch screen input       
   if (LEGO_Touch.dataAvailable())
   {
     LEGO_Touch.read();
     x=LEGO_Touch.getX();
     y=LEGO_Touch.getY();
     EvaluateTouch(x,y);       
     delay(100);
     while(LEGO_Touch.dataAvailable()) 
     {
       LEGO_Touch.read();
     }
   }
 }

}

// Determine if touch screen input is within an active zone
void EvaluateTouch(int x, int y)
{
 if ((x >= x_HotSpot) && (x <= x_HotSpot + HotSpot_width))
   if ((y >= y_HotSpot) && (y <= y_HotSpot + HotSpot_height))
     EvaluateSliders(x,y);
     
 if ((x >= x_button) && (x <= x_button + button_width))
   if ((y >= y_button) && (y <= y_button + button_height))
     ExecuteButton(x,y);      
}
  
// Reset Button for Outputs
void ExecuteButton(int x,int y)
{
  for(int x=0; x< 6; ++x)
   {
     EraseSliderValue(x, int (brick.Port_PWM_Value(x)/25));
     brick.PWM_Port(x, 0);
   }
 UpdateDisplay();  
}

// Determine which slider was "touched"
void EvaluateSliders(int x,int y)
{
 int line_number = (5 - (y-y_HotSpot)/(slider_height+1));
 int line_value = (x-x_HotSpot)/(slider_space);
 
 EraseSliderValue(line_number, int (brick.Port_PWM_Value(line_number)/25));
 brick.PWM_Port(line_number, int (line_value * 25));
 DrawSliderValue(line_number, line_value);
 DrawIndicatorValue(line_number,brick.Port_PWM_Value(line_number));

}

// Update Screen Elements
void UpdateDisplay()
{
 for(int x=0;x<8;++x)
   {
     if (x < 6)
       {
         DrawSliderValue(x,brick.Port_PWM_Value(x)); 
         DrawIndicatorValue(x,brick.Port_PWM_Value(x));     
       }
      else
       DrawIndicatorValue(x,brick.Input_Port(x)); 
   }
}

// Draw All Sliders
void Sliders()
{
 for(int x=0; x < 6; ++x)
   {
     y_slider = 224-(x*(slider_height+2));
     DrawSlider(x);   
     DrawSliderValue(x,0); 
   } 
} 

// Draw each Slider
void DrawSlider(int line)
{
 String label=" Line ";
 label.concat(char(48+line));
 LEGO_Display.setColor(255,255,255);
 LEGO_Display.setBackColor(0,0,0);  
 LEGO_Display.print(label, LEFT,224-(line*(slider_height+2)));
 LEGO_Display.print(" OFF", 53, 224-(line*(slider_height+2)));
 LEGO_Display.print(" MAX", RIGHT, 224-(line*(slider_height+2)));
 LEGO_Display.setColor(0,0,0);
 LEGO_Display.drawLine(x_slider,224-(line*(slider_height+2))+(slider_height/2),x_slider+slider_width+(10*slider_space),224-(line*(slider_height+2))+(slider_height/2));
 for(int x=0;x<11;++x)
   {
     LEGO_Display.drawLine(x_slider+(slider_width/2)+(x*slider_space),224-(line*(slider_height+2)),x_slider+(slider_width/2)+(x*slider_space),224-(line*(slider_height+2))+(slider_height));      
   }
}

// Display Slider Value on Screen
void DrawSliderValue(int line, int value)
{
 if (line < 6)
   LEGO_Display.setColor(255, 0, 0);
  else
   LEGO_Display.setColor(0, 255, 0);
 if (value == 0)
  LEGO_Display.setColor(0,0,0);  
 LEGO_Display.fillRoundRect(x_slider+(value*slider_space), 224-(line*(slider_height+2)), x_slider+slider_width+(value*slider_space), 224-(line*(slider_height+2)) + slider_height);    
 LEGO_Display.setColor(0, 0, 0); 
 LEGO_Display.drawRoundRect (x_slider+(value*slider_space), 224-(line*(slider_height+2)), x_slider+slider_width+(value*slider_space), 224-(line*(slider_height+2)) + slider_height);
 if (value == 0)
   {
     LEGO_Display.setColor(255,255,255);   
     LEGO_Display.drawRoundRect (x_slider+(value*slider_space)+1, 224-(line*(slider_height+2))+1, x_slider+slider_width+(value*slider_space)-1, 224-(line*(slider_height+2)) + slider_height-1);      
   }
} 

 // Remove Slider value from Screen
 void EraseSliderValue(int line, int value)
{
 LEGO_Display.setColor(0, 255, 255);
 LEGO_Display.fillRoundRect(x_slider+(value*slider_space), 224-(line*(slider_height+2)), x_slider+slider_width+(value*slider_space), 224-(line*(slider_height+2)) + slider_height);    
 LEGO_Display.setColor(0,0,0);
 LEGO_Display.drawLine (x_slider+(value*slider_space), 224-(line*(slider_height+2))+(slider_height/2), x_slider+slider_width+(value*slider_space), 224-(line*(slider_height+2))+(slider_height/2));
 LEGO_Display.drawLine(x_slider+(slider_width/2)+(value*slider_space),224-(line*(slider_height+2)),x_slider+(slider_width/2)+(value*slider_space),224-(line*(slider_height+2))+(slider_height));        
}

// Draw Indicator Dots on Screen
void Indicators()
{
 for(int x=0; x < 8; ++x)
   {
     DrawIndicatorValue(x,0);   
   } 
}

// Display Input and Output Status on Screen
void DrawIndicatorValue(int line, int value)
{
 LEGO_Display.setColor(50,50,50);
 
 if (line < 6)
   {
   if (value != 0)
     LEGO_Display.setColor(255,0,0);     
   }  
  else
   {
     if (value > 511)
       LEGO_Display.setColor(0,255,0);   
     Serial.println(value);     
   }   
     
 LEGO_Display.fillRoundRect(x_indicator-(line*indicator_space), y_indicator, x_indicator-indicator_width-(line*indicator_space), y_indicator + indicator_height);         
 LEGO_Display.setColor(0,0,0);
 LEGO_Display.drawRoundRect(x_indicator-(line*indicator_space), y_indicator, x_indicator-indicator_width-(line*indicator_space), y_indicator + indicator_height);               
}

// Draw All Input Display on Screen
void Outputs()
{
  for(int x=0;x<2;++x)
   {
     DrawOutput(x);
     DrawOutputValue(x,LOW);  
   }
}

// Draw each Input Display on Screen
void DrawOutput(int line)
{
 String label=" Output ";
 label.concat(char(48-line+7));
 label.concat(" ");
 LEGO_Display.setColor(255,255,255);
 LEGO_Display.setBackColor(0,0,0);  
 LEGO_Display.print(label, LEFT,y_output+(line*(output_height+2)));
 LEGO_Display.print("    ", RIGHT, y_output+(line*(output_height+2)));
 LEGO_Display.setColor(0,0,0);
 
 LEGO_Display.drawRoundRect(x_output, y_output+(line*(output_height+2)), x_output+output_width, y_output+(line*(output_height+2)) + output_height);                 

}

// Draw Input Display based on Value to Screen
void DrawOutputValue(int line, int value)
{
 if (line == 0)
   line = 1;
  else
   line = 0;
   
 if (value > 511)
   {
     LEGO_Display.setColor(0,255,0);      
     LEGO_Display.fillRoundRect(x_output, y_output+(line*(output_height+2)), x_output+output_width, y_output+(line*(output_height+2)) + output_height);                     
   }
  else
   {
     LEGO_Display.setColor(50,50,50);      
     LEGO_Display.fillRoundRect(x_output, y_output+(line*(output_height+2)), x_output+output_width, y_output+(line*(output_height+2)) + output_height);                     
   }
 LEGO_Display.setColor(0,0,0);  
 LEGO_Display.drawRoundRect(x_output, y_output+(line*(output_height+2)), x_output+output_width, y_output+(line*(output_height+2)) + output_height);                 
 
}