Trigorilla 14 Board with Zonestar (LCD2004) Display (no replies)

Hi everybody,

I am owning a CTC Prusa i3 diy printer for about 5 months now and its my first printer. I think it was the best decision to learn as much as possible about 3D printers. And I am modifying it heavily. I recently bought a new mainboard, the Trigorilla 14 Board, because I want to use the TMC2204 stepper drivers. The stock Anet A8 mainboard clone has fixed stepper Drivers, so I had to buy a new board to change the stepper drivers.

When I decided to buy the Trigorilla board (it's the same board, the Anycubic I3 Mega is using afaik), I made sure it is supporting my old Zonestar (LCD2004) display, which the printer is originally using. When I started to edit the firmware of the Trigorilla board, so that it mostly fits to my printer, i came along a problem. And because I am still quite new in terms of the firmware, I was not able to solve that problem on my own so far.

The description in "Configuration.h" tells me:

#define ZONESTAR_LCD            // Requires ADC_KEYPAD_PIN to be assigned to an analog pin.
                                  // This LCD is known to be susceptible to electrical interference
                                  // which scrambles the display.  Pressing any button clears it up.
                                  // This is a LCD2004 display with 5 analog buttons.

And when I try to compile that sketch, an error about that "ADC_KEYPAD_PIN" occurs:

Arduino: 1.8.9 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

In file included from sketch\MarlinConfig.h:39:0,

                 from sketch\Marlin.h:35,

                 from sketch\temperature.cpp:27:

sketch\temperature.cpp: In static member function 'static void Temperature::isr()':

temperature.cpp:2252:23: error: 'ADC_KEYPAD_PIN' was not declared in this scope

         HAL_START_ADC(ADC_KEYPAD_PIN);

                       ^

sketch\HAL.h:323:34: note: in definition of macro 'HAL_START_ADC'

   #define HAL_START_ADC(pin) if (pin > 7) ADCSRB = _BV(MUX5); else ADCSRB = 0; SET_ADMUX_ADCSRA(pin)

                                  ^

temperature.cpp:2252:23: error: 'ADC_KEYPAD_PIN' was not declared in this scope

         HAL_START_ADC(ADC_KEYPAD_PIN);

                       ^

sketch\HAL.h:321:53: note: in definition of macro 'SET_ADMUX_ADCSRA'

 #define SET_ADMUX_ADCSRA(pin) ADMUX = _BV(REFS0) | (pin & 0x07); SBI(ADCSRA, ADSC)

                                                     ^

sketch\temperature.cpp:2252:9: note: in expansion of macro 'HAL_START_ADC'

         HAL_START_ADC(ADC_KEYPAD_PIN);

         ^

exit status 1
'ADC_KEYPAD_PIN' was not declared in this scope

Dieser Bericht wäre detaillierter, wenn die Option
"Ausführliche Ausgabe während der Kompilierung"
in Datei -> Voreinstellungen aktiviert wäre.

OK, the Keypad pin has to be assigned to an analog pin. But I don't know, what the adc keypad pin itself is and I also don't know, what pins on my board are analog. And even if I knew it, I am not sure, how to saflefy change the pin assignment in pins_trigorilla_14.h, so that nothing is broken afterwards. And furthermore the ADC_KEYPAD_PIN doesn't even appear in the pins_trigorilla_14.h file.

The pins of the Trigorilla board can be seen in the following link:
Trigorilla 14 Pins

I would be very glad, if somebody could help me solving this problem. If any further information are needed, please ask and I do my best to provide it.
And I am sorry for my bad english.

Best regards
Hoast