Overview
The information here is aimed at connecting a stock ender 3 12864 display but it can also be applied to other 12864 displays (as long as they are ST7567 or ST7920 based).
Stock Ender 3 Display Wiring
The ender 3 stock display can be connected directly to the EXP header of the Fly-E3. No modifications are required.
Board.txt modifications
The following lines should be added to the board.txt file.
lcd.encoderPinA=LCD_D4
lcd.encoderPinB=LCD_EN
lcd.encoderPinSw=BTN_ENC
lcd.lcdCSPin=LCD_D6
lcd.spiChannel=4
lcd.lcdBeepPin = BEEP
Config.g changes
Add the following line to the end of your config.g
M918 P1 E4 F1000000
RepRapDiscount Display Wiring
The RepRapDiscount Full Graphic Smart Controller can be connected directly to the EXP header of the Fly-E3 using custom wiring.
Use the image below as a guide. Thanks @Samsan
Board.txt modifications
The following lines should be added to the board.txt file.
lcd.encoderPinA=LCD_D4
lcd.encoderPinB=LCD_EN
lcd.encoderPinSw=BTN_ENC
lcd.lcdCSPin=LCD_D6
lcd.spiChannel=4
lcd.lcdBeepPin = BEEP
Config.g changes
Add the following line to the end of your config.g
M918 P1 E4 F1000000
Menu Files
Menu files must be uploaded to allow the display to generate the correct information. This can be done in two ways. First, obtain the recommended menu files from here
Method 1 - WiFi Mode only
Extract the contents of the zip file you downloaded above and place them in a folder called “Menu” on the SD card of the Fly-E3.
Method 2
Activate the display using the config.g changes above.
On the “System” tab, above the list of files, is a dropdown menu that defaults to “System Directory”. Select this and change it to “Menu Directory”.
Then upload the menu zip file.
Troubleshooting
If the screen is showing artifacts/random characters on the screen, the following may improve/eliminate the issue
- Lower the SPI frequency by half. This is the F value in M918.
- Reduce the length of the cable between the screen and the board.
- Ensure that the cable between the screen and the board is routed away from other cables, especially motor cables.
- Add a ferrite ring to the cable between the screen and the board.