[FEATURE REQUEST] Support for MKS DLC32 MAX LCD [ESP-TFT35 v4.1]

[halfmanbear]

Uses the following hardware:

SoC: ESP32-WROOM-32U-N8
Capacitive Touch Panel Controller: FT6336U (I2C)
3.5" Capacitive Touch Panel: CL35BC219-40A (SPI)
Resolution: 480x320
USB-C: Wired to an onboard CH340C USB to serial chip
RJ11 serial port: To the host CNC controller
1x Unpopulated space for a beeper
1x Extra Button

[luc-github]

I did not MKS did ESP32 TFT like , do you have a link to the product ?

[luc-github]

ho wait I have it but it is in casing with RJ11 connector

[halfmanbear]

https://a.aliexpress.com/_Eu9jara

Official firmware link:
https://github.com/makerbase-mks/MKS-DLC32/tree/fcedc0ebb0e73e4e45024685bd0464f60a8fc355/MKS--DLC32-MAX-main/screen_firmware

[luc-github]

It is already in my plan actually, I should have the pinout somewhere,
I am currently working on rewrite of the esp3D-tft it will use this board as reference board but I do not have time frame yet

[luc-github]

what FW do you use on the DLC32 Max?
Native MKS?
grblHAL?
other one ?

[luc-github]

@halfmanbear Are you sure it is Capacitive Touch Panel Controller: FT6336U (I2C) ?
Mine it is suposed to be a Touch driver ：XPT2046 (SPI)

[halfmanbear]

Attached picture below of the FT6336U

I use grblHAL on the DLC32 MAX

The pinout of this display would be useful if you have it. Happy to contribute to this project.

[luc-github]

I see - I have checked and indeed I have same
Well pinout seems useless as it mention xtp2046 spi

[halfmanbear]

Started to manually probe the GPIO traces, I'll probably contact MKS for a pinout / schematic if they are willing to release one.

Values below aren't final they need reconfirming;

#define ESP3D_SERIAL_PORT UART_NUM_2
#define ESP3D_SERIAL_BAUDRATE "115200"
#define ESP3D_SERIAL_RX_PIN 16
#define ESP3D_SERIAL_TX_PIN 17

.scl_io_num = 4, // GPIO 4
.sda_io_num = 0, // GPIO 0
int_pin = 21, // GPIO 21
rst_pin = 14, // GPIO 14

.reset_gpio_num = 27
.spi_host_index = SPI3_HOST,
.pin_miso = 19, /< MISO pin number */
.pin_mosi = 23, /< MOSI pin number */
.pin_clk = 18, /**< CLK pin number */

.cs_gpio_num = 25,
.dc_gpio_num = 33,

disp_bcklt_cfg = .gpio_num = 5

[luc-github]

Please be noted current version of ESP3D-TFT may not work with grblHAL because grblHAL need specific command to enable the screen : 0x8B. Which is not yet implemented in ESP3D-TFT but will be in the rewrite version
https://github.com/grblHAL/core/wiki/MPG-and-DRO-interfaces#mpg--dro-mode

[halfmanbear]

makerbase-mks/MKS-DLC32#585

[halfmanbear]

ESP-TFT35 v4.1 GPIO Pinout

Manually probed the PCB; I believe these are correct.

UART2 (Serial)

Signal	GPIO
RX	16
TX	17

Touch Controller (I²C)

Signal	GPIO
SCL	4
SDA	0
INT	21
RST	14

LCD (SPI - SPI3_HOST)

Signal	GPIO
SDA	23
SDO	19
SCLK	18
CS	25
RS/DC	33
RST	27
Backlight	5

Misc

Signal	GPIO	Notes
Button	35
Buzzer	22	Unpopulated

[irwinrouch-svg]

Hello,
Just to make sure I am not missing something...
Am I supposed to make this touch screen work with my fluid NC MKL DLC32 MAx just with the info about the pins ?
Or the Screen needs a new special firmware and this is work in progress ?