http://blog.vettore.org/building-a-large-led-sign-with-inexpensive-standard-modules...

[Arduino] / HUB12_simple / HUB12_simple.ino

diff --git a/HUB12_simple/HUB12_simple.ino b/HUB12_simple/HUB12_simple.ino
new file mode 100644 (file)
index 0000000..250a034
--- /dev/null
+++ b/HUB12_simple/HUB12_simple.ino
@@ -0,0 +1,194 @@
+
+/**************************************************************
+*
+*  Sample sketch for driving 32x16 LED PANEL (1/4 scan) with
+*  HUB12 protocol
+*
+*************************************************************/
+ 
+#include <SPI.h>
+ 
+//Pins specific for Mega .See Arduino SPI for a different board.
+#define A 22 
+#define B 24 
+#define OE 26
+#define R1 51
+#define CLK 52
+#define STB 53
+ 
+ 
+//row to be shown (1-4 since it is 1/4 scan)
+byte row=0; 
+ 
+//brightness: increase->more bright
+int br=500;
+ 
+//some digits from a 8x8 font (numeric 1-8)
+byte digits[]={
+ 
+0x04,  //1
+0x0C,
+0x04,
+0x04,
+0x04,
+0x04,
+0x0E,
+0x00,
+ 
+0x0E, //2
+0x11,
+0x01,
+0x02,
+0x04,
+0x08,
+0x1F,
+0x00,
+ 
+ 
+0x1F, //3
+0x02,
+0x04,
+0x02,
+0x01,
+0x11,
+0x0E,
+0x00,
+ 
+0x02, //4
+0x06,
+0x0A,
+0x12,
+0x1F,
+0x02,
+0x02,
+0x00,
+ 
+0x1F, //5
+0x10,
+0x1E,
+0x01,
+0x01,
+0x11,
+0x0E,
+0x00,
+ 
+ 
+0x06, //6
+0x08,
+0x10,
+0x1E,
+0x11,
+0x11,
+0x0E,
+0x00,
+ 
+0x1F,//7
+0x01,
+0x02,
+0x04,
+0x04,
+0x04,
+0x04,
+0x00,
+ 
+ 
+0x0E,//8
+0x11,
+0x11,
+0x0E,
+0x11,
+0x11,
+0x0E,
+0x00,
+ 
+ 
+ 
+ 
+ 
+};
+ 
+ 
+ 
+void setup () {
+     pinMode(A, OUTPUT);
+     pinMode(B, OUTPUT);
+     pinMode(OE, OUTPUT);
+     pinMode(R1, OUTPUT);
+     pinMode(CLK, OUTPUT);
+     pinMode(STB, OUTPUT);
+     SPI.begin();
+     delay(300); 
+}    
+ 
+ 
+//display alternatively scan lines
+void loop(){
+       showRow(0);
+       showRow(1);
+       showRow(2);
+       showRow(3);
+}
+ 
+ 
+//Load and show row (1-4) i.e. 1 and 5, 2 and 6.....
+void showRow(int row){
+ 
+      SPI.transfer(~(digits[row+36]));   //5
+      SPI.transfer(~(digits[row+32]));              
+ 
+      SPI.transfer(~(digits[row+4]));    //1
+      SPI.transfer(~(digits[row]));            
+ 
+      SPI.transfer(~(digits[row+44]));   //6 
+      SPI.transfer(~(digits[row+40]));              
+ 
+      SPI.transfer(~(digits[row+12]));   //2
+      SPI.transfer(~(digits[row+8]));              
+ 
+      SPI.transfer(~(digits[row+52]));   //7
+      SPI.transfer(~(digits[row+48]));              
+ 
+      SPI.transfer(~(digits[row+20]));   //3
+      SPI.transfer(~(digits[row+16]));              
+ 
+      SPI.transfer(~(digits[row+60]));   //8
+      SPI.transfer(~(digits[row+56]));              
+ 
+      SPI.transfer(~(digits[row+28]));   //4
+      SPI.transfer(~(digits[row+24]));              
+ 
+      digitalWrite(STB,LOW);
+      digitalWrite(STB,HIGH);
+ 
+      scanrow(row);//enable encoder for the line loaded
+ 
+      //PWM like. Change br to adjust brightnes
+      digitalWrite(OE,HIGH);
+      delayMicroseconds(br);
+      digitalWrite(OE,LOW);
+      delayMicroseconds(900);
+ 
+ 
+}
+ 
+//enable encoder for this row in order to show it
+void scanrow(int r){
+    if(r==0){
+      digitalWrite(A,0);
+      digitalWrite(B,0);
+    }  
+    else if(r==1){
+      digitalWrite(A,1);
+      digitalWrite(B,0);
+    }
+    else if(r==2){
+      digitalWrite(A,0);
+      digitalWrite(B,1);
+    }
+    else if(r==3){
+      digitalWrite(A,1);
+      digitalWrite(B,1);
+    }
+}
+ 
+