gistfile1.txt

// E1.31 Receiver code base by Andrew Huxtable (andrew@hux.net.au).Adapted and modified by
// ccr (megapixel.lighting).
//
// This code may be freely distributed and used as you see fit for non-profit
// purposes and as long as the original author is credited and it remains open
// source
//
// Please configure your Lighting product to use Unicast to the IP the device is given from your DHCP server
// Multicast is not currently supported due to bandwidth/processor limitations


// You will need the Ethercard and FastLed Libraries from:
// [url]https://github.com/FastLED/FastLED/releases[/url]
//
// The Atmega328 only has 2k of SRAM.  This is a severe limitation to being able to control large
// numbers of smart pixels due to the pixel data needing to be stored in an array as well as
// a reserved buffer for receiving Ethernet packets.  This code will allow you to use a maximum of 240 pixels
// as that just about maxes out the SRAM on the Atmega328.


// There is deliberately no serial based reporting from the code to conserve SRAM.  There is a **little**
// bit available if you need to add some in for debugging but keep it to an absolute minimum for debugging
// only.


#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
#define USE_OCTOWS2811
#include<OctoWS2811.h>
#include<FastLED.h>


//*********************************************************************************


// enter desired universe and subnet  (sACN first universe is 1)
#define DMX_SUBNET 0
#define DMX_UNIVERSE 1 //**Start** universe


// Set a different MAC address for each...
byte mac[] = { 0x74, 0x69, 0x69, 0x2D, 0x30, 0x15 };


// Uncomment if you want to use static IP
//*******************************************************
// ethernet interface ip address
IPAddress ip(192, 168, 2, 21);  //IP address of ethernet shield
//*******************************************************


EthernetUDP Udp;


// By sacrificing some of the Ethernet receive buffer, we can allocate more to the LED array
// but this is **technically** slower because 2 packets must be processed for all 240 pixels.


/// DONT CHANGE unless you know the consequences...
 #define ETHERNET_BUFFER 636 //540
 #define CHANNEL_COUNT 4800 //because it divides by 3 nicely
 #define NUM_LEDS 1600 // can not go higher than this - Runs out of SRAM
 #define NUM_LEDS_PER_STRIP 200
 #define NUM_STRIPS 8
 #define UNIVERSE_COUNT 10
 #define LEDS_PER_UNIVERSE 170
 //#define BRIGHTNESS 100





//********************************************************************************


// Define the array of leds
CRGB leds[NUM_STRIPS * NUM_LEDS_PER_STRIP];

// Pin layouts on the teensy 3:
// OctoWS2811: 2,14,7,8,6,20,21,5


unsigned char packetBuffer[ETHERNET_BUFFER];
int c = 0;
float fps = 0;
unsigned long currentMillis = 0;
unsigned long previousMillis = 0;

void setup() {

    pinMode(9, OUTPUT);
  digitalWrite(9, LOW);   // reset the WIZ820io
  delay(10);
   digitalWrite(9, HIGH);   // reset the WIZ820io
  //pinMode(10, OUTPUT);
 // digitalWrite(10, HIGH);  // de-select WIZ820io
  //pinMode(4, OUTPUT);
  //digitalWrite(4, HIGH);   // de-select the SD Card
    Serial.begin(115200);
    delay(10);
  // Using different LEDs or colour order? Change here...
  // ********************************************************
  LEDS.addLeds<OCTOWS2811>(leds, NUM_LEDS_PER_STRIP);
  LEDS.setBrightness(32);
  // ********************************************************


 
  // ********************************************************  
  Ethernet.begin(mac,ip);
  Udp.begin(5568);
  // ******************************************************** 
    Serial.print("server is at ");
    Serial.println(Ethernet.localIP());

  //Once the Ethernet is initialised, run a test on the LEDs
  //initTest();
}







void sacnDMXReceived(unsigned char* pbuff, int count, int unicount) {
  if (count > CHANNEL_COUNT) count = CHANNEL_COUNT;
  byte b = pbuff[113]; //DMX Subnet
  if ( b == DMX_SUBNET) {
    b = pbuff[114];  //DMX Universe
   

    
    //Serial.println(b );
    if ( b >= DMX_UNIVERSE && b <= DMX_UNIVERSE + UNIVERSE_COUNT ) {
    




    
      if ( pbuff[125] == 0 ) {  //start code must be 0
      int ledNumber = (b - DMX_UNIVERSE) * LEDS_PER_UNIVERSE;
       // sACN packets come in seperate RGB but we have to set each led's RGB value together
       // this 'reads ahead' for all 3 colours before moving to the next led.
       //Serial.println("*");
       for (int i = 126;i < 126+count;i = i + 3){
          byte charValueR = pbuff[i];
          byte charValueG = pbuff[i+1];
          byte charValueB = pbuff[i+2];
          leds[ledNumber] = CRGB(charValueR,charValueG,charValueB);
          //Serial.println(ledNumber);
          ledNumber++;
        }




        
        //Serial.println(unicount);
        if (unicount == 10){
        
        LEDS.show();
        }

 
      }
          

      
    }
  }

}


int checkACNHeaders(unsigned char* messagein, int messagelength) {
  //Do some VERY basic checks to see if it's an E1.31 packet.
  //Bytes 4 to 12 of an E1.31 Packet contain "ACN-E1.17"
  //Only checking for the A and the 7 in the right places as well as 0x10 as the header.
  //Technically this is outside of spec and could cause problems but its enough checks for us
  //to determine if the packet should be tossed or used.
  //This improves the speed of packet processing as well as reducing the memory overhead.
  //On an Isolated network this should never be a problem....
  if ( messagein[1] == 0x10 && messagein[4] == 0x41 && messagein[12] == 0x37) {   
      int addresscount = (byte) messagein[123] * 256 + (byte) messagein[124]; // number of values plus start code
      return addresscount -1; //Return how many values are in the packet.
    }
  return 0;
}


void initTest() //runs at board boot to make sure pixels are working
{
  LEDS.showColor(CRGB(255, 0, 0)); //turn all pixels on red
   delay(1000);
   LEDS.showColor(CRGB(0, 255, 0)); //turn all pixels on green
   delay(1000);
   LEDS.showColor(CRGB(0, 0, 255)); //turn all pixels on blue
   delay(1000);
   LEDS.showColor(CRGB(0, 0, 0)); //turn all pixels off
}

void loop() {
   //Process packets
   int packetSize = Udp.parsePacket(); //Read UDP packet count
   if (c >= 10){
   
   c = 0;
   }
   if(packetSize){
    //Serial.println(packetSize);
    Udp.read(packetBuffer,ETHERNET_BUFFER); //read UDP packet
    
    
    int count = checkACNHeaders(packetBuffer, packetSize);
    if (count) {
      
     //Serial.print("packet size first ");
     //Serial.println(packetSize);

     c = c + 1;

     // calculate framerate
    currentMillis = millis();
    if(currentMillis > previousMillis){
      fps = 1 / ((currentMillis - previousMillis) * 0.001);
    } else {
      fps = 0;
    }
    previousMillis = currentMillis;
 
     if (fps > 10 && fps < 500)// don't show numbers below or over given ammount
     Serial.println(fps);
    
     sacnDMXReceived(packetBuffer, count, c); //process data function
     
     
    
    }  


  }


}