#include "wiring.h"

//
// 14-Segment Red LED Display LTM-8647AP by LITE-ON
//
//   AAAAAAA    AAAAAAA
//  FK  M  NB  FK  M  NB
//  F K M N B  F K M N B
//  F  KMN  B  F  KMN  B
//   GGG HHH   GGG HHH
//  E  TSR  C  E  TSR  C
//  E T S R C  E T S R C
//  ET  S  RC  ET  S  RC
//   DDDDDDD dp DDDDDDD  dp
//
//   Digit 1    Digit 2
//
// Data sequence:
//    digit:  222222222222221111111111111112
//  segment: 1ABCDEFGHKMNRSTABCDEFGHKMNRSTddxx00
// curDisplay ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  The leading 1 and trailing 00 are not included.


//
// Character Font Table.
//
static int  fontTbl[224] = {
  /* */0x0000, /*!*/0x3001, /*"*/0x2020, /*#*/0x07A4,
  /*$*/0x5BA4, /*%*/0x13DA, /*&*/0x4D68, /*'*/0x0010,
  /*(*/0x0018, /*)*/0x0042, /***/0x01FE, /*+*/0x01A4,
  /*,*/0x0002, /*-*/0x0180, /*.*/0x0001, /*/*/0x0012,
  /*0*/0x7E12, /*1*/0x3010, /*2*/0x6D80, /*3*/0x7880,
  /*4*/0x3380, /*5*/0x4B08, /*6*/0x5F80, /*7*/0x7200,
  /*8*/0x7F80, /*9*/0x7380, /*:*/0x0024, /*;*/0x0022,
  /*<*/0x0118, /*=*/0x0980, /*>*/0x00C2, /*?*/0x6085,
  /*@*/0x6E90, /*A*/0x7780, /*B*/0x78A4, /*C*/0x4E00,
  /*D*/0x7824, /*E*/0x4F00, /*F*/0x4700, /*G*/0x5E80,
  /*H*/0x3780, /*I*/0x4824, /*J*/0x3C00, /*K*/0x0718,
  /*L*/0x0E00, /*M*/0x3650, /*N*/0x3648, /*O*/0x7E00,
  /*P*/0x6780, /*Q*/0x7E08, /*R*/0x6788, /*S*/0x5B80,
  /*T*/0x4024, /*U*/0x3E00, /*V*/0x0612, /*W*/0x360A,
  /*X*/0x005A, /*Y*/0x2384, /*Z*/0x4812, /*[*/0x3098,
  /*\*/0x0048, /*]*/0x0742, /*^*/0x0240, /*_*/0x0800,
  /*`*/0x0040, /*a*/0x0D44, /*b*/0x0F04, /*c*/0x0D00,
  /*d*/0x0D24, /*e*/0x0D02, /*f*/0x40A4, /*g*/0x4B24,
  /*h*/0x0704, /*i*/0x0004, /*j*/0x0422, /*k*/0x003C,
  /*l*/0x0024, /*m*/0x1584, /*n*/0x0504, /*o*/0x1D80,
  /*p*/0x4720, /*q*/0x4324, /*r*/0x0500, /*s*/0x4B04,
  /*t*/0x01A4, /*u*/0x0C04, /*v*/0x0402, /*w*/0x140A,
  /*x*/0x005A, /*y*/0x0054, /*z*/0x0902, /*{*/0x4942,
  /*|*/0x0600, /*}*/0x4898, /*~*/0x0050, /*¦*/0x7FFE
  };


const int LED_CLOCK_PIN  = 3;      // 14-Seg Clock bus
const int LED_DATA_PIN   = 4;      // 14-Seg Data bus
const int buttonPin      = 5;      // Hard to get to push button on buzzer
const int IRPin          = 6;      // Infered detector
const int buzzerPin      = 7;      // Buzzer pin (HIGH = on)
const int LED_ENABLE_PIN = 8;      // Enable a 14-seg chip after address lines are set
const int LED_ADDR0_PIN  = 14;     // Address line 0
const int LED_ADDR1_PIN  = 15;     // Address line 1
const int LED_ADDR2_PIN  = 16;     // Address line 2
const int LED_ADDR3_PIN  = 17;     // Address line 3

void delay300ns()
  {
  int i=0; 
  while( i < 100 )
    i++;
  }

//#define HIGH 0x1
//#define LOW  0x0
//void  digitalWrite( int,  int );
void sendToChip( int  chip, long  data )
  {
  // Init Clock, Data, Enable pins
  digitalWrite( LED_CLOCK_PIN,  LOW );
  digitalWrite( LED_DATA_PIN,   LOW );
  digitalWrite( LED_ENABLE_PIN, HIGH ); // Inactive

  // Load address line with i.
  digitalWrite( LED_ADDR0_PIN, (chip & 0x01) );
  digitalWrite( LED_ADDR1_PIN, (chip & 0x02) );
  digitalWrite( LED_ADDR2_PIN, (chip & 0x04) );
  digitalWrite( LED_ADDR3_PIN, (chip & 0x08) );
 
  // Enable the chip
  digitalWrite( LED_ENABLE_PIN, LOW );  // Low active
  delay300ns();

  // Toggle the clock 36 time sending: 1dddddddddddddddddddddddddddddddd000.
  digitalWrite( LED_DATA_PIN, 1 );     // Output a "1"
  delay300ns();
  digitalWrite( LED_CLOCK_PIN,  HIGH );// Read the data on the rising edge.
  delay300ns();

  for( int i=0; i<32; i++ )
    {
    digitalWrite( LED_CLOCK_PIN,  LOW );// Reset the clock.
    
    // Set the data pin to the high order bit of data.
    delay300ns();
    digitalWrite( LED_DATA_PIN, (data<0) ? 1 : 0 );
    // Shift in the next bit.
    data <<= 1;

    delay300ns();
    digitalWrite( LED_CLOCK_PIN,  HIGH );// Read the data on the rising edge.
    delay300ns();
    }

  // Write the last 3 bits. Doesn't matter what they are.
  for( int i=0; i<3; i++ )
    {
    digitalWrite( LED_CLOCK_PIN,  LOW ); // Reset the clock.
    delay300ns();
    digitalWrite( LED_DATA_PIN, 0 );     // Output a "0"
    delay300ns();
    digitalWrite( LED_CLOCK_PIN,  HIGH );// Read the data on the rising edge.
    delay300ns();
    }
    
  digitalWrite( LED_ENABLE_PIN, HIGH ); // Inactive
  }