Support for Arduino nano Every

I'm trying to use this library on Arduino Nano Every, because the newer DMXSerial doesn't seem to work with ethernet shield using the EthernetENC library. When compiling I get the following error:

_c:\Users\gizmow\Documents\Arduino\libraries\DmxSimple\DmxSimple.cpp:77:2: error: #error "DmxSimple does not support this CPU"
 #error "DmxSimple does not support this CPU"
  ^~~~~
c:\Users\gizmow\Documents\Arduino\libraries\DmxSimple\DmxSimple.cpp: In function 'void TIMER2_OVF_vect()':
c:\Users\gizmow\Documents\Arduino\libraries\DmxSimple\DmxSimple.cpp:213:23: error: 'BITS_PER_TIMER_TICK' was not declared in this scope
   uint16_t bitsLeft = BITS_PER_TIMER_TICK; // DMX Bit periods per timer tick
                       ^~~~~~~~~~~~~~~~~~~

exit status 1

Compilation error: exit status 1_

There is no configuration for ATmega4809 processor. I tried to find out what could be by following here: https://emalliab.wordpress.com/2022/01/23/arduino-nano-every-timers-and-pwm/

/* TIMER2 has a different register mapping on the ATmega8.
 * The modern chips (168, 328P, 1280) use identical mappings.
 */
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
#define TIMER2_INTERRUPT_ENABLE() TIMSK2 |= _BV(TOIE2)
#define TIMER2_INTERRUPT_DISABLE() TIMSK2 &= ~_BV(TOIE2)
#define ISR_NAME TIMER2_OVF_vect
#define BITS_PER_TIMER_TICK (F_CPU / 31372)

// older ATMEGA8 has slighly different timer2
#elif defined(__AVR_ATmega8__)
#define TIMER2_INTERRUPT_ENABLE() TIMSK |= _BV(TOIE2)
#define TIMER2_INTERRUPT_DISABLE() TIMSK &= ~_BV(TOIE2)
#define ISR_NAME TIMER2_OVF_vect
#define BITS_PER_TIMER_TICK (F_CPU / 31372)

// ATMEGA32U4 on Teensy and Leonardo has no timer2, but has timer4
#elif defined (__AVR_ATmega32U4__)
#define TIMER2_INTERRUPT_ENABLE() TIMSK4 |= _BV(TOIE4)
#define TIMER2_INTERRUPT_DISABLE() TIMSK4 &= ~_BV(TOIE4)
#define ISR_NAME TIMER4_OVF_vect
#define BITS_PER_TIMER_TICK (F_CPU / 31372)

// Teensy 3.0 has IntervalTimer, unrelated to any PWM signals
#elif defined(CORE_TEENSY) && defined(__arm__)
#define TIMER2_INTERRUPT_ENABLE()
#define TIMER2_INTERRUPT_DISABLE()
#define ISR_NAME DMXinterrupt
#define ISR(function, option)  void function(void)
#define BITS_PER_TIMER_TICK 500
void DMXinterrupt(void);
IntervalTimer DMXtimer;

#else
#define TIMER2_INTERRUPT_ENABLE()
#define TIMER2_INTERRUPT_DISABLE()
#define ISR_NAME TIMER2_OVF_vect
/* Produce an error (warnings to not print on Arduino's default settings)
 */
#error "DmxSimple does not support this CPU"
#endif

But my knowledge is not enough to get the info properly.

Anyone could make this library work on Arduino Nano Every? Thanks, Antonio.

PaulStoffregen / DmxSimple

Support for Arduino nano Every #31