Art-Net transmission via UDP ver 1.0 vs ver 22

i have sketch transmitting artnet udp protocol works when compiled , uploaded arduino v22.  when compile , upload arduino 1.0 (after changing think appropriate calls), not transmit properly. 
when run wire shark on transmission, being transmitted arp packet, instead of udp packet.
i running duemilanove, w.5100 ethernet shield.

attached find both v22 , v1.0 sketches.

here v1.0 sketch

code: [select]

/*
artnet_send v1.0

potentiometers attached analog in 0 , 1
sends artnet packets every 3.5 seconds, or when potentiometers change.

*/
#include <spi.h>
#include <ethernet.h>
#include <ethernetudp.h>

byte mac[] = {  0x90, 0xa2, 0xda, 0x00, 0x87, 0xd5  };
byte ip[] = { 192, 168, 15,12};  //  local network ip
//byte ip[] = { 2, 0, 0, 177 }; // proper artnet protocol ip
byte gw[] = {ip[0], ip[1], ip[2],  1 };
byte sn[] = { 255,   0,   0,   0 };

byte sendip[] = {ip[0], 255, 255, 255};
unsigned int localport = 6454;      // art-net communicates via udp port=6454

//  ****  constants  ****
const int number_of_channels=512;
const int max_buffer_udp = 531;//18+512+1; //18bit udp header+512bit dmx packet+1 stopbit
ethernetudp udp;

//  ****  buffers  ****
//char
uint8_t packetbuffer[max_buffer_udp]; //udp packet, 0-17 header, 18 - 530 dmx buffer
unsigned char buffer_dmx[number_of_channels];

//  ****  art-net identification variables  ****

unsigned char artnethead[8]="art-net";    //field 1, (0-7)
short opcode=0x5000;
byte artnet_version_1= 0;        //field 3 (10)
byte artnet_version_2=14;        //field 4 (11)
byte seq_artnet=0;              //filed 5 (12)
byte artnet_physical=0;         //field 6 (13)
//int incoming_universe = 0;      //field 7 (15, 14)
int dmx_chan_tx = 512;         //field 8 & 9 (16-17)

int packetsize = 0;

int senduniverse = 2;//universe of artnet sent
int senddmxch = 508; // base channel of dmx sent on selected universe
int senddmxnum = 2;  //  number of dmx channels sent
long lasttxtime = 0;  //time of last transmission
int maxtxtime = 3500;  //3.5 seconds maximum between transmissions
boolean diffdmxval = 0;  // has dmx changed?
// slider pot input generate dmx value

const int levelpin[] = {0,1};

void setup()
{
  pinmode(4,output);
  digitalwrite(4,high);  //disables sd card
  serial.begin(9600);
  ethernet.begin( mac, ip, gw, sn);
  udp.begin(localport);
  (int = 0; i<dmx_chan_tx; i++)  //  set initial dmx values 0
  {
    buffer_dmx[i] = 0;
  } //end set dmx values 0
  (int = 18; i<max_buffer_udp; i++)  //set packet buffer '0', except header
  {
    packetbuffer[i] = 0;
  }

//  set packet header buffer

  (int = 0; i<8; i++)
  {
    packetbuffer[i] = artnethead[i];
  }
  packetbuffer[8] = 0x00;//opcode;  // low byte
  packetbuffer[9] = 0x50;//(opcode >> 8);  // high byte
  packetbuffer[10] = artnet_version_1;  //protocol version high
  packetbuffer[11] = artnet_version_2;  // prococol version low
  //packetbuffer[12] = seq_artnet:  // sequence number(increment each transmission)
  packetbuffer[13] = artnet_physical;  // physical input receiving dmx signal
  packetbuffer[14] = senduniverse;  // universe being transmitted (low byte)
  packetbuffer[15] = (senduniverse >> 8);  // universe being transmitted (high byte)
  packetbuffer[16] = (dmx_chan_tx >> 8);  // # of transmitting dmx chan (high byte)
  packetbuffer[17] = dmx_chan_tx;  // # of transmitting dmx chan (low byte)

}// end setup

void loop()
{
  //read potentiometer, convert reading scale (0-ff)
  (int =0; i< senddmxnum; i++)
  {
    buffer_dmx[senddmxch+i] = getlevel(i); //insert reading potentiometer dmx buffer
    if (buffer_dmx[senddmxch+i] == packetbuffer[senddmxch+17+i] && diffdmxval == false)
    {
      diffdmxval = false;//if no change of dmx value, not send packet
    } else
    {
      diffdmxval = true;  //if change of dmx value, write udp buffer, , send packet
    }
    // copy values buffer_dmx packetbuffer
    packetbuffer[senddmxch+17+i] = buffer_dmx[senddmxch +i];
  }

//  *****  max time between transmissions

  if (millis() - lasttxtime > maxtxtime)
  {
    diffdmxval = true;
  }

  packetbuffer[12] = seq_artnet;  //load seq# udp buffer 
  //send artnet packet if value change, or timeout
  switch (diffdmxval)
  {
    case false:  //if no new dmx value, not transmit
      break;
    case true:
  {
    udp.beginpacket(sendip, localport);
    udp.write(packetbuffer,max_buffer_udp); //
    int goodudp =  udp.endpacket(); //send built packet

//  int goodudp = udp.sendpacket(packetbuffer,max_buffer_udp,sendip, localport);  //depreciated uno
    if (goodudp == 1) 
    {
      lasttxtime = millis();  //packet sent, reset timer,
      seq_artnet ++; //increment sequence number in artnet header
    }
    diffdmxval =false; //reset state change detection
  }
  break;
  }
  delay(10);

}//end loop
 
 
unsigned char getlevel(int i)
{
  int levelpot = analogread(levelpin[i]);
  levelpot = map(levelpot,0,1023,0,255);
  return(levelpot);
}


v22 follow in next post

here v22 sketch

code: [select]


/*
artnet_send v22

potentiometers attached analog in 0 , 1
sends artnet packets every 3.5 seconds, or when potentiometers change.

*/
#include <spi.h>
#include <ethernet.h>
#include <udp.h>
#include <stdint.h>

byte mac[] = {  0x90, 0xa2, 0xda, 0x00, 0x87, 0xd5  };
byte ip[] = { 192, 168, 15,12};  //  local network ip
//byte ip[] = { 2, 0, 0, 177 }; // proper artnet protocol ip
byte gw[] = {ip[0], ip[1], ip[2],  1 };
byte sn[] = { 255,   0,   0,   0 };

byte sendip[] = {ip[0], 255, 255, 255};
unsigned int localport = 6454;      // art-net communicates via udp port=6454

//  ****  constants  ****
const int number_of_channels=512;
const int max_buffer_udp = 531;//18+512+1; //18bit udp header+512bit dmx packet+1 stopbit

//  ****  buffers  ****
//char
uint8_t packetbuffer[max_buffer_udp]; //udp packet, 0-17 header, 18 - 530 dmx buffer
unsigned char buffer_dmx[number_of_channels];

//  ****  art-net identification variables  ****

unsigned char artnethead[8]="art-net";    //field 1, (0-7)
short opcode=0x5000;
byte artnet_version_1= 0;        //field 3 (10)
byte artnet_version_2=14;        //field 4 (11)
byte seq_artnet=0;              //filed 5 (12)
byte artnet_physical=0;         //field 6 (13)
//int incoming_universe = 0;      //field 7 (15, 14)
int dmx_chan_tx = 512;         //field 8 & 9 (16-17)

int packetsize = 0;

int senduniverse = 2;//universe of artnet sent
int senddmxch = 508; // base channel of dmx sent on selected universe
int senddmxnum = 2;  //  number of dmx channels sent
long lasttxtime = 0;  //time of last transmission
int maxtxtime = 3500;  //3.5 seconds maximum between transmissions
boolean diffdmxval = 0;  // has dmx changed?
// slider pot input generate dmx value

const int levelpin[] = {0,1};

void setup()
{
  pinmode(4,output);
  digitalwrite(4,high);  //disables sd card
//  serial.begin(9600);
  ethernet.begin( mac, ip, gw, sn);
  udp.begin(localport);
  (int = 0; i<dmx_chan_tx; i++)  //  set initial dmx values 0
  {
    buffer_dmx[i] = 0;
  } //end set dmx values 0
  (int = 18; i<max_buffer_udp; i++)  //set packet buffer '0', except header
  {
    packetbuffer[i] = 0;
  }

//  set packet header buffer

  (int = 0; i<8; i++)
  {
    packetbuffer[i] = artnethead[i];
  }
  packetbuffer[8] = 0x00;//opcode;  // low byte
  packetbuffer[9] = 0x50;//(opcode >> 8);  // high byte
  packetbuffer[10] = artnet_version_1;  //protocol version high
  packetbuffer[11] = artnet_version_2;  // prococol version low
  //packetbuffer[12] = seq_artnet:  // sequence number(increment each transmission)
  packetbuffer[13] = artnet_physical;  // physical input receiving dmx signal
  packetbuffer[14] = senduniverse;  // universe being transmitted (low byte)
  packetbuffer[15] = (senduniverse >> 8);  // universe being transmitted (high byte)
  packetbuffer[16] = (dmx_chan_tx >> 8);  // # of transmitting dmx chan (high byte)
  packetbuffer[17] = dmx_chan_tx;  // # of transmitting dmx chan (low byte)

}// end setup

void loop()
{
  //read potentiometer, convert reading scale (0-ff)
  (int =0; i< senddmxnum; i++)
  {
    buffer_dmx[senddmxch+i] = getlevel(i); //insert reading potentiometer dmx buffer
    if (buffer_dmx[senddmxch+i] == packetbuffer[senddmxch+17+i] && diffdmxval == false)
    {
      diffdmxval = false;//if no change of dmx value, not send packet
    } else
    {
      diffdmxval = true;  //if change of dmx value, write udp buffer, , send packet
    }
    // copy values buffer_dmx packetbuffer
    packetbuffer[senddmxch+17+i] = buffer_dmx[senddmxch +i];
  }

//  *****  max time between transmissions

  if (millis() - lasttxtime > maxtxtime)
  {
    diffdmxval = true;
  }

  packetbuffer[12] = seq_artnet;  //load seq# udp buffer 
  //send artnet packet if value change, or timeout
  switch (diffdmxval)
  {
    case false:  //if no new dmx value, not transmit
      break;
    case true:
  {
    int goodudp = udp.sendpacket(packetbuffer,max_buffer_udp,sendip, localport);  //depreciated uno
    if (goodudp > 0) 
    {
      lasttxtime = millis();  //packet sent, reset timer,
      seq_artnet ++; //increment sequence number in artnet header
    }
    diffdmxval =false; //reset state change detection
  }
  break;
  }
  delay(10);

}//end loop
 
 
unsigned char getlevel(int i)
{
  int levelpot = analogread(levelpin[i]);
  levelpot = map(levelpot,0,1023,0,255);
  return(levelpot);
}



any thoughts doing wrong?

Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > Art-Net transmission via UDP ver 1.0 vs ver 22

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