--- /dev/null
+
+/**************************************************************
+*
+* Sample sketch for driving 24x16 LED PANEL (1/4 scan) with
+* HUB12 protocol
+* Support for multiple cascaded panels
+* Get text TO DISPLAY from the serial monitor
+*
+*************************************************************/
+
+#include <SPI.h>
+#include <Timer.h>
+#include "font.h"
+Timer t;
+Timer t1;
+
+//Pins specific for Mega.See Arduino SPI for a different board.
+#define A 2
+#define B 3
+#define OE 4
+#define R1 51
+#define CLK 52
+#define STB 53
+
+//number of cascaded panels
+#define N_PANELS 4
+
+//row to be shown (1-4 since it is 1/4 scan)
+byte row=0;
+
+//brightness: increase->more bright
+int br=400;
+
+int incomingByte = 0;
+
+//buffer 8 characters for N_PANELS
+
+
+
+byte stringDisp[8*N_PANELS]={
+ 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','x','y','0','1','2','3','4','5','6','7',
+};
+
+
+
+//pixBuffer reserved space for N_PANELS
+//contains status of every single pixel in our display!
+byte pixBuffer[8*8*N_PANELS]={
+};
+
+
+
+void setup () {
+ Serial.begin(9600);
+ pinMode(A, OUTPUT);
+ pinMode(B, OUTPUT);
+ pinMode(OE, OUTPUT);
+ pinMode(R1, OUTPUT);
+ pinMode(CLK, OUTPUT);
+ pinMode(STB, OUTPUT);
+
+ SPI.begin();
+
+ //set timers
+ //first timer is the refresh rate for the 1/4 scan
+ t.every(6,display);
+ //second timer is for change display text IF INPUT AVAILABLE
+ t1.every(1000,checkInput);
+
+ delay(300);
+}
+
+
+void loop(){
+
+ t.update();
+ t1.update();
+
+}
+
+
+//diplay alternatively the 4 scan lines
+void display(){
+ showRow(0);
+ showRow(1);
+ showRow(2);
+ showRow(3);
+}
+
+
+
+//Load and show row (1-4) i.e. 1-5-9-13, 2-6-10-14.....
+void showRow(int row){
+
+ int col=0;//is a column of 2 chars
+
+ for(col=0;col<4*N_PANELS;col++){//show 2 characters every cicle
+ SPI.transfer(~(pixBuffer[row+(col*8)+4+(32*N_PANELS)]));
+ SPI.transfer(~(pixBuffer[row+(col*8)+(32*N_PANELS)]));
+ SPI.transfer(~(pixBuffer[row+(col*8)+4]));
+ SPI.transfer(~(pixBuffer[row+(col*8)]));
+ }
+
+ 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);//PWM per aggiustare luminosità
+ 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);
+ }
+}
+
+//check if input from the serial monitor is available
+//and update the display
+void checkInput(void){
+ int x=0;
+ int y=0;
+ if(Serial.available()){
+ int h;
+ //clean display
+ for(h=0;h<(8*N_PANELS);h++)stringDisp[h]=32;
+ }
+ while (Serial.available() > 0) {
+ // read the incoming byte:
+ incomingByte = Serial.read();//only UP to the efective string length
+ if(x<(8*N_PANELS)) stringDisp[x]=incomingByte;
+ x++;
+ }
+ loadBuffer();
+}
+
+
+
+//load buffer with character pixels of the string
+//performing a lookup on the FONT table
+void loadBuffer(void){
+ int x;
+ int y;
+ for(y=0;y<(8*(N_PANELS));y++){
+ for(x=0;x<8;x++){
+ pixBuffer[x+8*y]=font[8*stringDisp[y]+x-(31*8)];//char under <=31 not defined
+ }
+ }
+}
+
--- /dev/null
+
+/**************************************************************
+*
+* 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);
+ }
+}
+
+
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