[request] pin configuration for skr mini 1.2 and tft24

[INeDiA]

Is anyone be so kind to try and guess the correct pins for this combination? The wiring is this one: https://prnt.sc/r2w9yr

Thanks!

[teeminus]

This looks like you need a special display cable to connect your tft24 to the mainboard. Do you have such a cable?

[INeDiA]

Of course I do (well, I made it). The screen works while using Marlin, both in touch and in emulation mode. But now I switched to Klipper and I can't figure out how to configure pins in my printer.cfg after having flashed your firmware

[teeminus]

Which display type have you defined in marlin?

[teeminus]

Are you sure that image is correct? Please check the EXP2 header, the striked out pins do not match with your drawing below.

[INeDiA]

Are you sure that image is correct? Please check the EXP2 header, the striked out pins do not match with your drawing below.

I honestly didn't noticed, I just followed the paths to do the wiring! Is this blueprint helpful? https://github.com/bigtreetech/BIGTREETECH-TFT24-V1.1/blob/master/Hardware/TFT24-V1.1-PIN.pdf

According to a reddit post: +5V -> EXP1/+5V GND -> EXP1/GND PB7 -> EXP1/PB15 PB8 -> EXP1/PB12 PB9 -> EXP1/PB13 PA10 -> EXP2/PB1 RST -> EXP2/RST PA9 -> EXP2/PB0 PB6 -> EXP1/PB2 PB5 -> EXP1/PA14

In Marlin I had:

define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER

define CR10_STOCKDISPLAY

Everything was fine, clickwheel included.

Thanks!

[teeminus]

Is this blueprint helpful? https://github.com/bigtreetech/BIGTREETECH-TFT24-V1.1/blob/master/Hardware/TFT24-V1.1-PIN.pdf

Yeah, I found that already.

According to you drawing (the lines, not the connectors), this should work

[display]
lcd_type: st7920 
cs_pin: PB8
sclk_pin: PB9
sid_pin: PB7
encoder_pins: ^PA9, ^PA10
click_pin: ^!PB6

[output_pin beeper]
pin: PB5

[INeDiA]

Uhmmm I'm afraid this is not working; this is my config:

[board_pins] aliases:

EXP1 header

EXP1_1=PB5, EXP1_3=PA9,   EXP1_5=PA10, EXP1_7=PB8, EXP1_9=<GND>,
EXP1_2=PB6, EXP1_4=<RST>, EXP1_6=PB9,  EXP1_8=PB7, EXP1_10=<5V>

The display shows "NoTouchFw V1.2" on top and then a big "ST7920Emulator ready" on the screen. Saved and restarted firmware, also powercycled the screen.

Thanks again <3

[teeminus]

Are you capable of compiling this firmware yourself? Then checkout the readd_cs_pin branch. This could help debug the settings. This branch has an activity indictor for the SPI interface as well as a SPI restart feature when pressing the knob for at least 5 seconds. Refere to here for more infos.

[INeDiA]

The readd_cs_pin branch is working!

It didn't worked first try, I had to do the 5-seconds-reset and the interface showed up. It is fully working, temperatures and fans update correctly.

Thanks a lot, feel free to write me if you need any testing with a new release!

[teeminus]

The readd_cs_pin branch is working!

Glad to hear that 😊 In the next release, the SPI indicator will be disabled by default. If you like it (like I do) you have to reenable it yourself.

It didn't worked first try, I had to do the 5-seconds-reset and the interface showed up.

I am working on a fix for that which will hopefully be included in klipper soon 😉

Thanks a lot, feel free to write me if you need any testing with a new release!

I sure will, thanks for the offer 😄

[teeminus]

There has been an update to both Klipper and this firmware that should fix your issue. Please checkout the latest release and read the release notes carefully 😄

[INeDiA]

I flashed the precompiled binary successfully.

"ST7920Emulator ready" (v1.3) is showing at startup, then I always have to reset manually (pressing the knob) at every boot, then turn the knob a few times in order to make the display work. I think this is working as intended!

Klipper version: v0.9.1-290

Thanks!

[teeminus]

Have you tried using the emulated_st7920 lcd_type as described here?

[INeDiA]

No because I apparently don't pay attention even when people ask me to do so 🤦

Working config for skr mini 1.2 and tft24, Klipper version: v0.9.1-290 and NoTouchScreenFirmware 1.3:

[board_pins]
aliases:
    # EXP1 header
    EXP1_1=PB5, EXP1_3=PA9,   EXP1_5=PA10, EXP1_7=PB8, EXP1_9=<GND>,
    EXP1_2=PB6, EXP1_4=<RST>, EXP1_6=PB9,  EXP1_8=PB7, EXP1_10=<5V>

[display]
lcd_type: emulated_st7920 
en_pin: PB8
spi_software_sclk_pin: PB9
spi_software_mosi_pin: PB7
encoder_pins: ^PA9, ^PA10
click_pin: ^!PB6
spi_software_miso_pin: PA2 #this pin was unused on my board, change accordingly    

[teeminus]

Thanks for the feedback. Happy printing 😄

[INeDiA]

sorry for the gravedigging; do you mind adding the config to the wiki? :)

[teeminus]

Sorry, I totally forgot about that :( Added it just now.