SKR mini E3 Turbo with DWIN display

[tome9111991]

hi
i try to get work the DWIN display with SKR mini E3 Turbo
Any idea how to get working without errors & warring?

in Marlin\src\pins\lpc1769\pins_BTT_SKR_E3_TURBO.h

i add

`
#if ENABLED(DWIN_CREALITY_LCD)

#ifndef BEEPER_PIN
#define BEEPER_PIN               EXP1_05_PIN
#undef SPEAKER

#endif

#define BTN_EN1                  EXP1_03_PIN
#define BTN_EN2                  EXP1_04_PIN
#define BTN_ENC                  EXP1_06_PIN

//#define LCD_PINS_RS              EXP1_04_PIN
//#define LCD_PINS_ENABLE          EXP1_03_PIN
//#define LCD_PINS_D4              EXP1_05_PIN

#endif`

The pins from SKR mini looks like

with Jyers Firmware i got this error

With Original Marlin branch i got this warrning i don't know how to fix:

My config for Jyers branch
configs.zip

[agalakhov]

The stock V2 display is connected using UART, not SPI. Look at the pinout written at the LCD board near the connector.
The "Turbo" board is not directly compatible with V2 stock display due to different pinout but it should be possible to reassign pins in software. You have to define LCD_SERIAL to be a software serial connected to the correct pin.

[tome9111991]

Dwin has rx and tx pin but im missing the pin on e3 turbo board.
On e3 v2.0 board had tx & rx pin

if I understand this correctly consider tx and rx to be the software serial
tx should be EXP1_07_PIN
rx should be EXP1_08_PIN

[agalakhov]

You may convert other pins to RX and TX using software serial by sacrificing some performance. I believe the corresponding pins are at P0.17 and P0.18 but I'm not sure. Or rewire them to the P10 connector, it has RX and TX.

[agalakhov]

Yes, you understand this correctly. Just double-check pin assignment.

[tome9111991]

maybe i cancel the e3 turbo project i don't know how to use software serial.

i should buy a mini e3 v2
i can compile without a error or waring
need only repin the wire

[tome9111991]

If someone has free time can try to compile JyersUI for LPC1769.
default_envs = LPC1769
#define MOTHERBOARD BOARD_BTT_SKR_E3_TURBO

and add in Marlin\src\pins\lpc1769\pins_BTT_SKR_E3_TURBO.h

#if ENABLED(DWIN_CREALITY_LCD)

  
    #define BEEPER_PIN               EXP1_10_PIN
    #define BTN_EN1                  EXP1_03_PIN
    #define BTN_EN2                  EXP1_04_PIN
    #define BTN_ENC                  EXP1_06_PIN


 
  #endif

with default Marlin Bugfix branch the Ender3 v2 original Display works well with SKR E3 Turbo.
I have still issue to compile with JyersUI got this error:

Marlin\src\lcd\dwin\creality_dwin.cpp: In member function 'void Mesh_Settings::Draw_Bed_Mesh(int16_t, uint8_t, uint16_t, uint16_t)':
Marlin\src\lcd\dwin\creality_dwin.cpp:339:27: error: 'MSerialT' {aka 'struct ForwardSerial<MarlinSerial>'} has no member named 'availableForWrite'
  339 |         while (LCD_SERIAL.availableForWrite() < 32) { // wait for serial to be available without blocking and resetting the MCU
      |                           ^~~~~~~~~~~~~~~~~
Marlin\src\lcd\dwin\dwin.cpp: In function 'bool DWIN_Handshake()':
Marlin\src\lcd\dwin\dwin.cpp:98:10: error: no match for 'operator!' (operand type is 'MSerialT' {aka 'ForwardSerial<MarlinSerial>'})
   98 |   while (!LCD_SERIAL && PENDING(millis(), serial_connect_timeout)) { /*nada*/ }
Marlin\src\lcd\dwin\dwin.cpp:98:10: note: candidate: 'operator!(bool)' <built-in>
Marlin\src\lcd\dwin\dwin.cpp:98:10: note:   no known conversion for argument 1 from 'MSerialT' {aka 'ForwardSerial<MarlinSerial>'} to 'bool'
*** [.pio\build\LPC1768\src\src\lcd\dwin\dwin.cpp.o] Error 1
*** [.pio\build\LPC1768\src\src\lcd\dwin\creality_dwin.cpp.o] Error 1

[eohl79]

I managed to get an SKR E3 Turbo board with stock Creality display working. Besides the LCD pin changes and rewiring, needed the following to fix your compile errors:

in Marlin/src/inc/Conditionals_LCD.h

#if MB(BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO)
  #define LCD_SERIAL_PORT 1
#else
  #define LCD_SERIAL_PORT 3 // Creality 4.x board
#endif

in Marlin/src/lcd/dwin/creality_dwin.cpp
while (!LCD_SERIAL.available()) { // wait for serial to be available without blocking and resetting the MCU

in Marlin/src/lcd/dwin/dwin.cpp
while (!LCD_SERIAL.connected() && PENDING(millis(), serial_connect_timeout)) { /*nada*/ }

[tome9111991]

@eohl79
thanks i can compile i got only warrning durring compile.

I will test soon with my display

EDIT:
I have tested JyersUI with SKR E3 Turbo it works with Ender3v2 Stock display so far