git.rot13.org Git - Arduino/blob - HUB12_simple/HUB12_simple.ino

   1
   2 /**************************************************************
   3 *
   4 *  Sample sketch for driving 32x16 LED PANEL (1/4 scan) with
   5 *  HUB12 protocol
   6 *  http://blog.vettore.org/building-a-large-led-sign-with-inexpensive-standard-modules-and-arduino/
   7 *
   8 *************************************************************/
   9
  10 #include <SPI.h>
  11
  12 //Pins specific for Mega .See Arduino SPI for a different board.
  13 #define A 22
  14 #define B 24
  15 #define OE 26
  16 #define R1 51
  17 #define CLK 52
  18 #define STB 53
  19
  20
  21 //row to be shown (1-4 since it is 1/4 scan)
  22 byte row=0;
  23
  24 //brightness: increase->more bright
  25 int br=500;
  26
  27 //some digits from a 8x8 font (numeric 1-8)
  28 byte digits[]={
  29
  30 0x04,  //1
  31 0x0C,
  32 0x04,
  33 0x04,
  34 0x04,
  35 0x04,
  36 0x0E,
  37 0x00,
  38
  39 0x0E, //2
  40 0x11,
  41 0x01,
  42 0x02,
  43 0x04,
  44 0x08,
  45 0x1F,
  46 0x00,
  47
  48 0x1F, //3
  49 0x02,
  50 0x04,
  51 0x02,
  52 0x01,
  53 0x11,
  54 0x0E,
  55 0x00,
  56
  57 0x02, //4
  58 0x06,
  59 0x0A,
  60 0x12,
  61 0x1F,
  62 0x02,
  63 0x02,
  64 0x00,
  65
  66 0x1F, //5
  67 0x10,
  68 0x1E,
  69 0x01,
  70 0x01,
  71 0x11,
  72 0x0E,
  73 0x00,
  74
  75 0x06, //6
  76 0x08,
  77 0x10,
  78 0x1E,
  79 0x11,
  80 0x11,
  81 0x0E,
  82 0x00,
  83
  84 0x1F,//7
  85 0x01,
  86 0x02,
  87 0x04,
  88 0x04,
  89 0x04,
  90 0x04,
  91 0x00,
  92
  93 0x0E,//8
  94 0x11,
  95 0x11,
  96 0x0E,
  97 0x11,
  98 0x11,
  99 0x0E,
 100 0x00,
 101
 102 };
 103
 104 void setup () {
 105      pinMode(A, OUTPUT);
 106      pinMode(B, OUTPUT);
 107      pinMode(OE, OUTPUT);
 108      pinMode(R1, OUTPUT);
 109      pinMode(CLK, OUTPUT);
 110      pinMode(STB, OUTPUT);
 111      SPI.begin();
 112      delay(300);
 113 }
 114
 115
 116 //display alternatively scan lines
 117 void loop(){
 118        showRow(0);
 119        showRow(1);
 120        showRow(2);
 121        showRow(3);
 122 }
 123
 124
 125 //Load and show row (1-4) i.e. 1 and 5, 2 and 6.....
 126 void showRow(int row){
 127
 128       SPI.transfer(~(digits[row+36]));   //5
 129       SPI.transfer(~(digits[row+32]));
 130
 131       SPI.transfer(~(digits[row+4]));    //1
 132       SPI.transfer(~(digits[row]));
 133
 134       SPI.transfer(~(digits[row+44]));   //6
 135       SPI.transfer(~(digits[row+40]));
 136
 137       SPI.transfer(~(digits[row+12]));   //2
 138       SPI.transfer(~(digits[row+8]));
 139
 140       SPI.transfer(~(digits[row+52]));   //7
 141       SPI.transfer(~(digits[row+48]));
 142
 143       SPI.transfer(~(digits[row+20]));   //3
 144       SPI.transfer(~(digits[row+16]));
 145
 146       SPI.transfer(~(digits[row+60]));   //8
 147       SPI.transfer(~(digits[row+56]));
 148
 149       SPI.transfer(~(digits[row+28]));   //4
 150       SPI.transfer(~(digits[row+24]));
 151
 152       digitalWrite(STB,LOW);
 153       digitalWrite(STB,HIGH);
 154
 155       scanrow(row);//enable encoder for the line loaded
 156
 157       //PWM like. Change br to adjust brightnes
 158       digitalWrite(OE,HIGH);
 159       delayMicroseconds(br);
 160       digitalWrite(OE,LOW);
 161       delayMicroseconds(900);
 162
 163 }
 164
 165 //enable encoder for this row in order to show it
 166 void scanrow(int r){
 167     if(r==0){
 168       digitalWrite(A,0);
 169       digitalWrite(B,0);
 170     }
 171     else if(r==1){
 172       digitalWrite(A,1);
 173       digitalWrite(B,0);
 174     }
 175     else if(r==2){
 176       digitalWrite(A,0);
 177       digitalWrite(B,1);
 178     }
 179     else if(r==3){
 180       digitalWrite(A,1);
 181       digitalWrite(B,1);
 182     }
 183 }