Help needed (BTT SKR mini e3 v2 & TFT35 E3 V3)

teeminus / NoTouchScreenFirmware

Stripped down version of BIGTREETECH-TouchScreenFirmware which only supports ST7920 emulation (Marlin Mode)

GNU General Public License v3.0

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Help needed (BTT SKR mini e3 v2 & TFT35 E3 V3) #23

Closed jappyjan closed 3 years ago

jappyjan commented 3 years ago

So im poking around at the TFT35 E3 V3.0 screen for a few hours now and im stuck...

What i got so far:

I installed the matching noTouchScreenFirmware in Version 1.2 successfully
i see on screen "ST7920Emulator ready"

But im not getting any further...

Im using a BTT SKR mini e3 v2 with klipper and my klipper config for the screen looks like this:

[board_pins]
aliases:
    # EXP1 header
    EXP1_1=PB5, EXP1_3=PA9,   EXP1_5=PA10, EXP1_7=PB8, EXP1_9=<GND>,
    EXP1_2=PA15, EXP1_4=<RST>, EXP1_6=PB9,  EXP1_8=PB15, EXP1_10=<5V>

[display]
lcd_type: st7920
cs_pin: EXP1_7
sclk_pin: EXP1_6
sid_pin: EXP1_8
encoder_pins: ^EXP1_5, ^EXP1_3
click_pin: ^!EXP1_2

teeminus commented 3 years ago

This is a well known SPI activation problem. There will be an update to both klipper and this firmware in couple of days that addresses this problem.

The quick and dirty fix (not the final one :D) would be to checkout the readd_cs_pin branch and compile the firmware yourself. Afterwards you can press the know for 5 second which will restart the SPI bus and hopefully make the screen work again. For more infos read here: https://github.com/teeminus/NoTouchScreenFirmware/issues/15#issuecomment-781597330

The final fix for this won't require manually restarting the SPI.

teeminus commented 3 years ago

You can also checkout this issue #20 which seems to be closely related.

jappyjan commented 3 years ago

so i did the mentioned steps:

checked out branch "readd_cs_pin"
build firmware for TFT35_E3_V3_0
installed/flashed firmware
restarted spi by holding button for 5 secs

what happened is:

the screen actually gets blank for a moment and then comes up again, now no longer showing the "Emulator Ready" text but still empty. only thing on screen is the top label "NoTouchFw 1.2" with a line

Bild

i actually tried exp1 and exp3 header on the screen just to make sure... but same result for both.

teeminus commented 3 years ago

Have you tried executing a firmware_restart after the knob long press?

jappyjan commented 3 years ago

yes

jappyjan commented 3 years ago

small update.

i again turned off everything and powered everything again. then i pressed the knob 5 secs to restart the screen. this time it showed the number "1" and after a few seconds the number "2"

because nothing else happened i run "firmware_reset" again which caused the screen to show again the emulator ready text. then i pressed the knob again and now its blank again...

jappyjan commented 3 years ago

ok wow... dunno what changed but did the same once again and now its showing stuff! :D thanks for the help! i will never turn the printer off again :D

teeminus commented 3 years ago

Yeah, that bug is pretty annoying. Stay tuned for the final fix which will be available soon 😃

teeminus commented 3 years ago

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 😄

jappyjan commented 3 years ago

thank you so much for the effort! just installed the updates, migrated my config and now everything works flawlessly!

teeminus commented 3 years ago

Glad to hear that. Thanks for waiting and testing the new release. Have fun 😄