How to add menu options to the (Marlin firmware) LCD menu?
Where is the correct Marlin firmware file and location to add code that I want to shop up in the LCD menu of my printer, and then execute the function I write when the button is pressed?
For example I want to add a menu item that says "Preheat Custom" that is in the same menu as "preheat PLA" and "preheat ABS" and then runs code to heat to values I specify.
I'm running Marlin Firmware version 1.1.9 on a Creality Ender 3.
0scar Correct answer4 years ago
The answer to your question is the file ultralcd.cpp. Nowadays, you can also enable extra option through the Configuration_adv.h file, just enable:
and edit the options beneath it to your needs (otherwise it will use the preset values from the Configuration.h file).
Add custom items using ultralcd.cpp
This is how I used to do it if you want to add items to the menu in Marlin Firmware through the ultralcd.cpp. It is best to first look at the current implementation of the menu items. As you already mention
Preheat PLA, that would be the first to search for. Searching in files is easy when you go to the github website with the Marlin firmware sources, functionality is available for searching in the files. Alternatively, download a copy of the firmware and use a free "grep" utility to search in files.
Preheat PLAwill show you a bunch of language translation files. These point to the use of a constant
MSG_PREHEAT_1which finds its presence in ultralcd.cpp. This hints to function
lcd_preheat_m1_menuthat is called by
MENU_ITEMwhich adds menu items to LCD. You could start there to add your own option.
As a quick demonstration, I've added a
CUSTOM PREHEATitem by copying the
lcd_preheat_m2_menufunction in ultralcd.cpp and renamed this
lcd_preheat_m3_menu(a full functional item needs changes within the
lcd_preheat_m3_menuas it now uses the constants from the ABS preheat option).
You then add the item to the menu by changing this part of the code:
// Preheat for Material 1 and 2
#if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_3 != 0 || TEMP_SENSOR_4 != 0 || HAS_HEATED_BED
MENU_ITEM(submenu, MSG_PREHEAT_1, lcd_preheat_m1_menu);
MENU_ITEM(submenu, MSG_PREHEAT_2, lcd_preheat_m2_menu);
// ADD THIS LINE:
MENU_ITEM(submenu, "CUSTOM PREHEAT", lcd_preheat_m3_menu);
MENU_ITEM(function, MSG_PREHEAT_1, lcd_preheat_m1_e0_only);
MENU_ITEM(function, MSG_PREHEAT_2, lcd_preheat_m2_e0_only);
After compiling and uploading to the printer board, enter the
Preparemenu and scroll down to see:
License under CC-BY-SA with attribution
Content dated before 7/24/2021 11:53 AM