Can't get NewSoftSerial and this code to work (DMX

I am using the UART @250kbps to process incoming frames of DMX values.

I use a frame counter to downsample (i.e. I only read every 4th frame).

And then I want to grab a few values from the DMX frame and then send them out some other pins via NewSoftSerial at a lower baud rate.

So far this is not working and I think it has to do with the conflict between NewSoftSerial and the code setup for processing the DMX (which uses Timer2).

Can anyone see what’s wrong? (this is all on a Duemilanove)

* DMX-512 Reception                                        *
* Developed by Max Pierson                                 *
* Version Rev13 9 July 2009                                *
* Released under the WTFPL license, although I would       *
* appreciate Attribution and Share-Alike                   *
* See for the latest version. *

//!!!!! TWI.h speed increased from 100kHz to 400kHz!

#include <avr/pgmspace.h>
#include <NewSoftSerial.h>

#define DMX_MAX_CHANNELS 3   //number of DMX values to read from the starting adress onwards.
#define FRAME_RATE 4    // used to reduce the frame rate of the incoming DMX which is too fast (250kbps) down to a fraction of this max speed

/******************************* Addressing variable declarations *****************************/

unsigned int dmxaddress = 0;
/* The dmx address we will be listening to.  The value of this will be set in the Addressing()
*  function, if triggered, and read from EEPROM addresses 510 and 511. */

// int dipswitch[9] = {8,17,16,15,14,7,6,5,4}; 
int dipswitch[9] = {4,5,6,7,14,15,16,17,8}; 

/******************************* MAX485 variable declarations *****************************/

/* receiver output enable (pin2) on the max485.  
*  will be left low to set the max485 to receive data. */

/* driver output enable (pin3) on the max485.  
*  will left low to disable driver output. */

#define RX_PIN 0   // serial receive pin, which takes the incoming data from the MAX485.
#define TX_PIN 1   // serial transmission pin

/******************************* DMX variable declarations ********************************/

volatile byte i = 0;              //dummy variable for dmxvalue[]
volatile byte dmxreceived = 0;    //the latest received value
volatile unsigned int dmxcurrent = 0;     //counter variable that is incremented every time we receive a value.
volatile byte dmxvalue[DMX_MAX_CHANNELS];     //stores the DMX values we're interested in using.
volatile boolean dmxnewvalue = 0; //set to 1 when new dmx values are received.
volatile byte frameCount = 0;
int counter = 0;
/******************************* Timer2 variable declarations *****************************/

volatile byte zerocounter = 0;          
/* a counter to hold the number of zeros received in sequence on the serial receive pin.  
*  When we've received a minimum of 11 zeros in a row, we must be in a break.  As written,
*  the timer2 ISR actually checks for 22 zeros in a row, for the full 88uS break.       */

#define SETBAUD 57600
#define xbeeRX 9 //digital pin 18
#define xbeeTX 10 //digital pin 19
NewSoftSerial xbee(xbeeRX,xbeeTX);

void setup() {
  /******************************* Max485 configuration ***********************************/
  digitalWrite(DRIVER_OUTPUT_ENABLE, LOW);    //sets pins 3 and 4 to low to enable reciever mode on the MAX485.

  pinMode(RX_PIN, INPUT);  //sets serial pin to receive data

  /******************************* Addressing subroutine *********************************/
  for (int i = 0; i<9; i++)
    pinMode(dipswitch[i], INPUT);
    digitalWrite(dipswitch[i], HIGH);
  dmxaddress = getAddress();
  //dmxaddress = dipAddress;
  dmxaddress = dmxaddress + 3;
  /*  this will allow the USART receive interrupt to fire an additional 3 times for every dmx frame.  
  *   Here's why:
  *   Once to account for the fact that DMX addresses run from 0-511, whereas channel numbers
  *        start numbering at 1.
  *   Once for the Mark After Break (MAB), which will be detected by the USART as a valid character 
  *        (a zero, eight more zeros, followed by a one)
  *   Once for the START code that precedes the 512 DMX values (used for RDM).  */

  /******************************* USART configuration ************************************/
  /* Each bit is 4uS long, hence 250Kbps baud rate */
  cli(); //disable interrupts while we're setting bits in registers
  bitClear(UCSR0B, RXCIE0);  //disable USART reception interrupt
  /******************************* Timer2 configuration ***********************************/
  //NOTE:  this will disable PWM on pins 3 and 11.
  bitClear(TCCR2A, COM2A1);
  bitClear(TCCR2A, COM2A0); //disable compare match output A mode
  bitClear(TCCR2A, COM2B1);
  bitClear(TCCR2A, COM2B0); //disable compare match output B mode
  bitSet(TCCR2A, WGM21);
  bitClear(TCCR2A, WGM20);  //set mode 2, CTC.  TOP will be set by OCRA.
  bitClear(TCCR2B, FOC2A);
  bitClear(TCCR2B, FOC2B);  //disable Force Output Compare A and B.
  bitClear(TCCR2B, WGM22);  //set mode 2, CTC.  TOP will be set by OCRA.
  bitClear(TCCR2B, CS22);
  bitClear(TCCR2B, CS21);
  bitSet(TCCR2B, CS20);   // no prescaler means the clock will increment every 62.5ns (assuming 16Mhz clock speed).
  OCR2A = 64;                
  /* Set output compare register to 64, so that the Output Compare Interrupt will fire
  *  every 4uS.  */
  bitClear(TIMSK2, OCIE2B);  //Disable Timer/Counter2 Output Compare Match B Interrupt
  bitSet(TIMSK2, OCIE2A);    //Enable Timer/Counter2 Output Compare Match A Interrupt
  bitClear(TIMSK2, TOIE2);   //Disable Timer/Counter2 Overflow Interrupt Enable          
  sei();                     //reenable interrupts now that timer2 has been configured. 

}  //end setup()

//byte x = 0;

void loop()  {
  // the processor gets parked here while the ISRs are doing their thing. 
  if (dmxnewvalue == 1) {    //when a new set of values are received, jump to action loop...
    if (frameCount == FRAME_RATE)
      frameCount = 0;
    dmxnewvalue = 0;
    dmxcurrent = 0;
    zerocounter = 0;      //and then when finished reset variables and enable timer2 interrupt
    i = 0;
    bitSet(TIMSK2, OCIE2A);    //Enable Timer/Counter2 Output Compare Match A Interrupt
} //end loop()

//Timer2 compare match interrupt vector handler
  if (bitRead(PIND, PIND0)) {  // if a one is detected, we're not in a break, reset zerocounter.
    zerocounter = 0;
  else {
    zerocounter++;             // increment zerocounter if a zero is received.
    if (zerocounter == 22)     // if 22 0's are received in a row (88uS break)
      bitClear(TIMSK2, OCIE2A);    //disable this interrupt and enable reception interrupt now that we're in a break.
      bitSet(UCSR0B, RXCIE0);
} //end Timer2 ISR

  dmxreceived = UDR0;
  /* The receive buffer (UDR0) must be read during the reception ISR, or the ISR will just 
  *  execute again immediately upon exiting. */
  dmxcurrent++;                        //increment address counter
  if(dmxcurrent > dmxaddress) 
  {         //check if the current address is the one we want.
    if (frameCount == 0) dmxvalue[i] = dmxreceived;
    if(i == DMX_MAX_CHANNELS) 
      bitClear(UCSR0B, RXCIE0); 
      dmxnewvalue = 1;                        //set newvalue, so that the main code can be executed.
} // end ISR

int getAddress()
  int _address = 0;
  for (int i = 0; i<9; i++)
    _address = 2*_address + !digitalRead(dipswitch[i]);
  return _address;

void action() 
/*********** Put what you want the code to do with the values (dmxvalue) here *************
example code: print out the received values to the serial port, and set PWM pins 5 and 6 
to the first two values received.  You can take this code out and put your own in.*/

  int val;
    xbee.print("3 DMX bytes read!!!");
  return;  //go back to loop()
} //end action() loop

So far this is not working

What does that mean?

No working =

DMX reception works fine and previously I was just using I2C to send messages to a second arduino (although there was a lot of latency that I could not figure out despite increasing the bus speed to 400kHz and using suitable pullup resistors).

With NewSoftSerial I am getting no output whatsoever.

Also when I tried initializing NewSoftSerial before all of the DMX stuff and sending serial data it works. After the UART and TIMER interrupt setup I am no longer able to send stuff via NSS anymore.