Can't receive DMX on the UART0 swap pin.

[devarishi7]

Hi, First of all thank you for your library ! It works great when i use an ESP on the default RX pin (3). Somehow i tried before to receive on the UART0 swap pin (13), by simply making a small modification calling instead of pinMode(3, SPECIAL); inside of void uart_init_rx() pinMode(13, FUNCTION_4); That didn't work as expected somehow. I managed to write my own DMX receive code, which did work on the swap pin, but then i was creating something that uses the primary RX pin again and that code somehow failed to work properly and your library did work, so i thought i'd try and see if i could get it to work again on the swap pin, but somehow still no luck. Any idea how to get it working ? I went as far as to modify the startInput(); function to

void LX8266DMX::startInput ( bool swap ) {	
	if ( _direction_pin != DIRECTION_PIN_NOT_USED ) {
		digitalWrite(_direction_pin, LOW);
	}
	if ( _interrupt_status != ISR_INPUT_ENABLED ) {
		stop();
	}
	if ( _interrupt_status == ISR_DISABLED ) {	//prevent messing up sequence if already started...
	   _dmx_read_state = DMX_STATE_IDLE;
	   uart_init_rx(DMX_DATA_BAUD, FORMAT_8N2, this, swap);
	   _interrupt_status = ISR_INPUT_ENABLED;
	}
}

and uart_init_rx(); to

void uart_init_rx(int baudrate, byte config, LX8266DMX* dmxi, bool swap) {
    uint32_t conf1 = 0x00000000;
	if (swap) {
		pinMode(13, FUNCTION_4);
	}
	else {
		pinMode(3, SPECIAL);
	}
    uart_set_baudrate(UART0, baudrate);
    USC0(UART0) = config;
    
    conf1 |= (0x01 << UCFFT);
    USC1(UART0) = conf1;

    uart_rx_flush();
    uart_enable_rx_interrupt(dmxi);
}

to not break the existing library using sketch, and in my mind, this should do the trick. I know for sure the hardware works.