View source for Adafruit32x16RGB

I am working on a project using [http://www.adafruit.com/products/420&zenid=19e0e0e853fdff51f9d2f6b94233efbe 16x32 RGB Panel].

Here is a video of the panel working:

[http://www.youtube.com/watch?v=q_ko3kHqsXY Panel Working]

I wanted to figure out the timing for the interface so I wrote the code myself without using the sample code.

Here is the sample code:

<pre>
// test the 32x16 LED board.  Public Domain.

#define A     A0
#define B     A1
#define C     A2
#define LAT   A3
#define OE    9
#define CLK   8
#define R1    2
#define G1    3
#define B1    4
#define R2    5
#define G2    6
#define B2    7

void setup() {
  Serial.begin(115200);

  pinMode(R1,OUTPUT);
  pinMode(G1,OUTPUT);
  pinMode(B1,OUTPUT);
  pinMode(R2,OUTPUT);
  pinMode(G2,OUTPUT);
  pinMode(B2,OUTPUT);
  pinMode(CLK,OUTPUT);
  pinMode(OE,OUTPUT);
  pinMode(A,OUTPUT);
  pinMode(B,OUTPUT);
  pinMode(C,OUTPUT);
  pinMode(LAT,OUTPUT);

  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(LAT,LOW);
  digitalWrite(OE,LOW);
  digitalWrite(CLK,HIGH);
}

void updateRow(int i) {
    digitalWrite(OE,LOW);

    // Set the row address
    if ( i & 0x1 ) {
      digitalWrite(A,HIGH);
    } else {
      digitalWrite(A,LOW);
    }
    if ( i & 0x2 ) {
      digitalWrite(B,HIGH);
    } else {
      digitalWrite(B,LOW);
    }
    if ( i & 0x4 ) {
      digitalWrite(C,HIGH);
    } else {
      digitalWrite(C,LOW);
    }

    for ( uint8_t x = 0; x < 64; x++ ) {
      digitalWrite(CLK,LOW);

      if ( x > 31 ) {
        // This will end up on the display closest to the arduino
        digitalWrite(R1,HIGH);
        digitalWrite(G1,HIGH);
        digitalWrite(B1,HIGH);
        digitalWrite(R2,LOW);
        digitalWrite(G2,LOW);
        digitalWrite(B2,HIGH);
      } else {
        // This will end up on the display farthest from the arduino
        digitalWrite(R1,LOW);
        digitalWrite(G1,HIGH);
        digitalWrite(B1,LOW);
        digitalWrite(R2,HIGH);
        digitalWrite(G2,LOW);
        digitalWrite(B2,LOW);
      }
        
      digitalWrite(CLK,HIGH);
    }
    digitalWrite(LAT,HIGH);
    digitalWrite(LAT,LOW);
    digitalWrite(OE,HIGH);
}

void loop() {

  for ( int i = 0; i < 8; i++ ) {
    updateRow(i);
  } 
}
</pre>

Here is a video of it working:

[http://www.youtube.com/watch?v=-iVad2X3Yfo RGB Panels Cascaded]

I tried the sample programs with 2 cascaded displays and they were mirrored for some reason.  I'm not sure why.  Also, the first row is corrupted.  Here are videos of that happening:

[http://www.youtube.com/watch?v=-iVad2X3Yfo Cascaded Plasma]

[http://www.youtube.com/watch?v=K6YONDkpExg Cascaded Test Shapes]

I have started working on refreshing the display using a [http://www.xess.com/prods/prod047.php Xula-50] FPGA board.  Here is the [http://www.jaysissom.com/rgb/rgb.html Timing Diagram] I am using in the FPGA code.  More videos and Verilog code will be coming soon.

Here is the circuit board I created to interface the RGB panel with the Xula-50: [[Image:Xula rgb circuit.jpg]]

Here are two panels that are controlled by the xula-50 board:

[http://www.youtube.com/watch?v=4JRx4wk0kIE Xula-50 Control]