View source for 8*8 Single-color Lattice Control

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==Objective==

The course will show you how to use Processing to control 8*8 lattice. 

==Equipment==
*'''[[Microduino-Core]]'''
*'''[[Microduino-FT232R]]'''

*Other Hardware Equipment  
**A USB cable 
**A box of jumpers 
**A breadboard 
**A 8*8 lattice 
**Two 74HC595 		


==Schematic==

[[File:88LatticeSchematics.jpg|600px|center|thumb]]

==Program==

Referring to  ProcessingLattice

==Debugging==

Step 1: Build the hardware environment according to the schematic, as follows: 
[[File:88LatticeConnectionDiagram.jpg|600px|center|thumb]]


Step 2: Explain the code: 

There will be the code of two ends (Processing and Microduino) needed in this course. 

Microduino:

Using firmata's StandardFirmata program. 
 

Processing:

//Define the first serial port. 
  arduino = new Arduino(this, Arduino.list()[0], 57600);

//Define the output pin in setup() as well as 64 LED objects 
  arduino.pinMode(latchPin, Arduino.OUTPUT);
  for (int i=0;i<8;i++) {
    for (int j = 0; j < 8; j ++ ) { // Initialize each led and output pin using a for loop.
      leds[i][j] = new LED((i+1)*60, (j+1)*60, 50, 50, j+1+(i*10));

      ledStates[i][j]=false;
    }
  }


//Judge on which line or row the open fire of the 64 LED goes on or off. 
  background(255);
  for (int i=0; i<8;i++) {
    for (int j = 0; j < 8; j ++ ) { // Run each LED using a for loop.
      leds[i][j].display();
      if (leds[i][j].button) {//switch led on/off
        ledStates[i][j]=true;
      }
      else {
        ledStates[i][j]=false;
      }
    }
  }

//Control and process the 74hc595 chip, map onto the 8*8 lattice. 
  for (int i=0;i<8;i++) {
    arduino.digitalWrite(latchPin, 0);
    shiftOut(dataPin, clockPin, maskByteLines[0]); //mask(col)
    shiftOut(dataPin, clockPin, booleanArray2Byte(ledStates[i])); //row
    arduino.digitalWrite(latchPin, 1);
  }

Function Reference:

mousePressed();//Mouse clicked event processing

booleanArray2Byte();//Convert boolean array into byte value 

shiftOut();//The 74hc595 chip's shifOut binary handler function 


Step 3: Get the code downloaded and compiled successfully. 

Step 4: The 8*8 LED lattice will be displayed in Processing. Click any LED to see what happens. 

==Result==

The LED lights go on and out correspondingly with the 8*8 lattice, just like this
[[File:88LatticeResult.jpg|600px|center|thumb]]


==Video==


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