File content as of revision 0:d6ede4c39036:

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/*SMARTGPU intelligent embedded graphics processor unit
 those examples are for use the SMARTGPU with the mbed microcontoller, just connect tx,rx,and reset
 Board:
 http://www.vizictechnologies.com/#/desarrollo/4554296549
 
 This example requires pre-loaded content, an image to the micro SD card!
 
 www.vizictechnologies.com 
 Vizic Technologies copyright 2011 */
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#include "mbed.h"
#include "SMARTGPU.h"

SMARTGPU lcd(p13,p14,p15);     //(TX,RX,Reset);

//Each time we use the touchscreen we must define a int array that stores the X and Y readed or touched coordinates.
int touch[2];
//Each time we use the touchicon we must define a char array that stores the name of the touched icon.
char icon[3];

char pixelArray[3];                     //Array to store the RGB888 pixel obtained with memoryRead()


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//Funcion to convert a 3 byte array to an int RGB565
int RGB888ToRGB565(char pixBuffer[]){   //get an array of 3 bytes( red, green, blue), and convert them to RGB565 returned in an int
  unsigned char R,G,B;
  unsigned int col;
  unsigned long colour;
  
  R=pixBuffer[0];
  G=pixBuffer[1];
  B=pixBuffer[2]; 
  ((unsigned char *) &colour)[1]=(R & 0xF8);
  R=G;
  G=G>>5;
  ((unsigned char *) &colour)[1]|=G;
  G=(R<<3)& 0xE0;
  ((unsigned char *) &colour)[0]=B;
  ((unsigned char *) &colour)[0]=((unsigned char *) &colour)[0]>>3;  
  ((unsigned char *) &colour)[0]|=G;
  col=colour;
  return col;
}


int main() { 
  lcd.reset();                    //physically reset SMARTGPU
  lcd.start();                    //initialize the SMARTGPU processor

  unsigned char penSize=1;
  int colPaint=BLACK;
  char pen[4]={'x','0','1',0x00};         //Array that show the current penSize
        
  lcd.baudChange(2000000);   // Set a fast baud!, always that we use touch functions is recommended to use fast baud rates
  
  //Load paint design
  lcd.imageSD(0,0,"paint");    
  lcd.string(7,54,48,65,GREEN,FONT1,FILL,"Erase");    //draw Erase word
  lcd.string(77,54,110,65,GREEN,FONT1,FILL,pen);      //draw penSize 
 
  while(1){   //Start the Paint application
  
    while(!lcd.touchScreen(touch));                   //Wait for a touch on the screen to do something      
    //Once we get a touch somewhere on the screen:
    if((touch[YCOORD]-penSize)<67){                   //the touch was on the menu
      if(touch[XCOORD]<45){                           //touch on erase circle
        lcd.drawRectangle(0,67,319,239,WHITE,1);      //Draw a white rectangle on drawing area
      }else if(touch[XCOORD]<75){                     //touch to select the eraser
        colPaint=WHITE;
        lcd.drawCircle(25,34,14,colPaint,FILL);       //draw WHITE colour circle on top left corner           
      }else if(touch[XCOORD]<108){                    //touch to change pen Size 
        penSize=penSize*2;                            //double the penSize
        if(penSize==16){                              //maximum pen size = 8, if we reach 16 we set to 1.
          penSize=1;
        }          
        pen[1]=(penSize/10)+0x30;                     //get the tens of penSize and convert them to ascii
        pen[2]=(penSize%10)+0x30;                     //get the ones of penSize and convert them to ascii
        lcd.string(77,54,110,65,GREEN,FONT1,FILL,pen);//draw penSize 
        wait_ms(500);                                 //delay to avoid fast penSize changing            
      }else if(touch[XCOORD]<312 & touch[YCOORD]>20 & touch[YCOORD]<59){                     //touch on the colours bar                  
        lcd.memoryRead(touch[XCOORD],touch[YCOORD],touch[XCOORD],touch[YCOORD],pixelArray);  //assign new colour based on touch coordinates and memory read, this function return a 24 bit pixel array, 
        colPaint=RGB888ToRGB565(pixelArray);
        lcd.drawCircle(25,34,14,colPaint,FILL);                                              //draw new selected colour on top left corner           
      }                
    }else{                                            //Touch on drawing area
      lcd.drawCircle(touch[XCOORD],touch[YCOORD],penSize,colPaint,FILL);                    //Draw
    }
  }
}