ENC28J60 read udp data stream in to array

Projects Programming
1

Hi Folks

I'm using an arduino nano and an ENC28J60 with the following sketch that receives data and sends it back out to the dmx pin using the dmxsimple library, I am however struggling to get ANY data out and guess I'm doing something wrong in the conversion somewhere, the data coming in is UDP packets

#include "etherShield.h"
#include "ETHER_28J60.h"
#include <DmxSimple.h>


#define bytes_to_short(h,l) ( ((h << 8) & 0xff00) | (l & 0x00FF) );


int StartUniv = 0;
short incoming_universe=0; //leave as is (if suspect uni number issues, try changing first_uni number above first.




static uint8_t mac[6] = { 0xBE, 0xEF, 0x00, 0x00, 0x00, 0x00 }; // this just needs to be unique for your network, 
static uint8_t ip[4] = {192, 168, 1, 15}; // IP address for the webserver
static uint16_t port = 6454; // ART NET udp port


byte channel[768]; // The number of channels to store data for


ETHER_28J60 e;


// The setup loop, executed only once before the main loop
void setup() { 
Serial.begin(9600);
DmxSimple.usePin(2);
DmxSimple.maxChannel(512);

e.setup(mac,ip , port);
Serial.print("I'm Alive");
}

void loop() {

char* EthernetData;

if (channel = e.serviceRequest())
{
  incoming_universe=bytes_to_short(EthernetData[15],EthernetData[14]);
  
if (incoming_universe == StartUniv)
     {
      for(int i=0;i< 513;i++)
           {
              DmxSimple.write(i, byte(EthernetData[i + 17]));
           }
      } 
}


}
2 
char* EthernetData;

if (channel = e.serviceRequest())
{
  incoming_universe=bytes_to_short(EthernetData[15],EthernetData[14]);

EthernetData is a pointer that points nowhere. You can NOT use it like an array. You need a REAL array.

3

Ok, so now I'm stumped, with the wiznet it's just a simple matter of udp.read straight in to an array, any idea on how I do it with the ENC28j60's?

cheers

Mike

4

Anyone?