DeLorean HUD

 #define joystickX 2
#define joystickY 26
uint16_t x, y, x00, y00;
uint16_t colour;
uint32_t z;

#include "font.h"
 
// MIC and Buzzer
#define AIN 0 // Note: AIN0 == pin2
#define BUZ1 3
#define BUZ2 4

// The 8x8 led matrix
// define pin where LATCH is located, can be any GPIO 
// (default on BoosterPack is 6)
#define LATCH 9 
// define pin where CLOCK is located, can be any GPIO 
// (default on BoosterPack is 7)
#define CLOCK 10 
// define pin where DATA is located, can be any GPIO 
// (default on BoosterPack is 14)
#define DATA 8 
#define DELAYTIME 1 // microseconds to wait after setting pin

#define TILES 6 // number of tiles
#define SPEED 40 // smaller number is faster 


// The string to display, change this to dsiplay a different message
// const char *str = "}} Hello  World... good morning! }}";
// const char *str = "}} !\"#$%&'( }}";
const char *strright = "%%%";
const char *strleft = "$$$";
// +*)('&%$#"\!
// Image buffer, you can modify the bits and they will be displayed on the 8x8 matrix with the sendImage() function
unsigned char image[8*TILES];


/**
*** setup()
*** Enable the output pins
**/
void setup()
{
  memset(image,0xFF,sizeof(image));
  pinMode(CLOCK, OUTPUT);
  pinMode(DATA, OUTPUT);
  pinMode(LATCH, OUTPUT);
  pinMode(PUSH2, INPUT_PULLUP);
  Serial.begin(9600);
}

// Read switch status
boolean button()
{
  return digitalRead(PUSH2) == 0;
}

// send bits to tiles, each 8x8 tile receives 16 bits to LED tile (bits 0..7 are column, 8..15 are row) 
void sendData(unsigned short data)
{
  for(unsigned short i=0; i<16; i++)
  {
    if ( data & ((unsigned short)1<<i)  )
      digitalWrite(DATA, 1);
    else
      digitalWrite(DATA, 0);
//    nop();
    digitalWrite(CLOCK,1);
//    nop();
    digitalWrite(CLOCK,0);
  }
}

// scan an image on the LED tile
// 8x8 bitmap img is the input
void sendImage(unsigned char *img)
{
  unsigned short data;
  for(unsigned int i=0;i<8;i++)
  {
    for(unsigned int n=0;n<TILES;n++)
    {
      data = (1<<8)<<i;
      data |= *(img+i+(8*n));
      sendData(data);
    }
     // Latch data 
  //nop();
  digitalWrite(LATCH,1);
  //nop(); 
  digitalWrite(LATCH,0);
  }
}

// Shift alls bytes in the image right and add a byte in the display buffer
void shiftRight(unsigned char c)
{
  for(unsigned short i=((8*TILES)-1); i>0; i--)
    image[i] = image[i-1];
  image[0] = c;
}

// Shift all bytes in the image buffer left and add byte in the display buffer
void shiftLeft(unsigned char c)
{
  for(unsigned short i=0; i<((8*TILES)-1); i++)
    image[i] = image[i+1];
  image[(8*TILES)-1] = c;
}

#define ABS(a) ( (a<0 ? -a : a) )

// Sinewave example
void sineWave()
{
  static const unsigned char wave[] = {4,5,6,6,7,7,7,6,6,5,4,3,2,1,1,0,0,0,1,1,2,3,4};
  unsigned char j = 0, q;
  for(int i=0; i<60;i++)
  {
    j = i % sizeof(wave);
    shiftLeft(1 << wave[j]);
    for(q=0; q<2; q++) sendImage(image);
  }
}

// display a text going right on the 8x8 display
void showTextRight(const char *txt)
{
  int a =0, i=0, j=0;
  while(1)
  {
    sendImage(image);
    if ( a++ > SPEED ) // shift in new line
    {  
      a=0;
      if ( j < 5 ) // copy character
      shiftRight( *(fontPtr(txt[i]) + (unsigned int)j) );

      else
      {
        shiftRight(0); // blank line       
        sendImage(image);
      }
      if ( ++j > 5 ) // next character
      {
        j = 0;
        if ( ++i >= strlen(txt) ) 
          return; 
      } 
    }
  } 
}
// display a text going right on the 8x8 display
void showTextLeft(const char *txt)
{
  int a=0, i=0, j=0;
  {
    while(1)
    {
      sendImage(image);
      if ( a++ > SPEED ) // shift in new line
      {  
        a=0;
        if ( j < 5 ) // copy character
        shiftLeft( *(fontPtr(txt[i]) + (unsigned int)j) );
  
        else
        {
          shiftLeft(0); // blank line
          
          sendImage(image);
        // tone(500);
        }
        if ( ++j > 5 ) // next character
        {
          j = 0;
          if ( ++i >= strlen(txt) ) 
            return; 
        } 
      }
    } 
  }
}

/**
*** main loop, keep refreshing the image
**/
void loop()
{
  x = map(analogRead(joystickX), 0, 4096, 0, 128);
  y = map(analogRead(joystickY), 0, 4096, 128, 0);
  if (x < 1)      x = 1;
  if (x > 126)    x = 126;
  if (y < 1)      y = 1;
  if (y > 126)    y = 126;
  //Serial.println(x);
  if (x == 126){
    showTextRight(strright);
  }
  else if (x == 1){
    showTextLeft(strleft);
  }
  else
  {
    showTextLeft("  4-19-1955  ");
  }
}