displayTFT35 E3 V3 and klipper

[Jeff2405]

I just bought an SKR1.4 card and a TFT35 E3 screen.
I connected the screen with both EXP1 and EXP2 cables as well as the RS 232.
When I start the screen lights up, works in touch but rings continuously when I switch to Marlin mode.
I have a "no printer attached" message. I changed the speed of transmission and it's the same.
I added in the CFg printer:
[board_pins]
aliases:
# EXP1 header
EXP1_1=P1.30, EXP1_3=P1.18, EXP1_5=P1.20, EXP1_7=P1.22, EXP1_9=,
EXP1_2=P0.28, EXP1_4=P1.19, EXP1_6=P1.21, EXP1_8=P1.23, EXP1_10=<5V>,
# EXP2 header
EXP2_1=P0.17, EXP2_3=P3.26, EXP2_5=P3.25, EXP2_7=P1.31, EXP2_9=,
EXP2_2=P0.15, EXP2_4=P0.16, EXP2_6=P0.18, EXP2_8=, EXP2_10=

[dkarpes]

Hi

did you plug it in the last most right (exp3 i think it is) and you need to bridge it with this code

BigTreeTech TFT TouchScreen emulated 12864 mode: Set the display in printer.cfg to the following parameters

[display]
lcd_type: emulated_st7920
spi_software_miso_pin: PD8 # status led, Virtual MISO
spi_software_mosi_pin: PD6
spi_software_sclk_pin: PB9
en_pin: PB8
encoder_pins: ^PA10, ^PA9
click_pin: ^!PA15

[output_pin beeper]
pin: PB5

And after going to marlin mode, try to turn the knob as well.

[Jeff2405]

no I connected exp1 and exp2 as well as RS232 on the screen with TFt on the card.
I will try your solution

[Jeff2405]

hello
I get this error message "Pin 'PB8' is not a valid pin name on mcu 'mcu'" when I put this config

[dkarpes]

I thought you had a BTT skr mini e3 v3.0. But you need to translate the pin names from my code to your card
But that is the LED you can try to piut a # in front of it to disable the led, and try if that works.
As far i could find my PD8 is your P0.17
check and translate my pins to your board:
https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/blob/master/BTT%20SKR%20V1.4/Hardware/BTT%20SKR%20V1.4-SCH.pdf

[dkarpes]

Found this somewere on a form:

Pin Mapping Summary for SKR V1.4:

SPI Software MISO Pin: Replace with PA12 or similar GPIO.
SPI Software MOSI Pin: Replace with PA15 or PB14.
SPI Software SCLK Pin: Replace with PB10 or PB3.
EN Pin: PB8 (usually directly available).
Encoder Pins: PA10, PA9 (should be directly usable).
Click Pin: PA15 or PC13.

Always double-check your specific SKR V1.4 board documentation,
as some pins might be tied to particular functions depending on the firmware configuration.

maybe you can do something with this!

good luck!

[Jeff2405]

Hello

I don't live on the document where you see the pinout numbers (PA12, PA15, etc..)

[dkarpes]

sorry, didnt see your message:
found this in a marlin pin mapping file
https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/blob/master/BTT%20SKR%20V1.4/Firmware/Marlin-bugfix-2.0.x-SKR-V1.4/Marlin/src/pins/lpc1768/pins_BTT_SKR_V1_4.h

maybe you can translate the pins to your display