Luatos C3 display (Air101-LCD)

[Jason2866]

Struggling with display.ini for the C3 Luatos ST7735S Display.

This demo code works fine. https://github.com/MoonFox2006/Air101-LCD
Managed to get display activated using this template and display.ini (wrong init sequences).

{"NAME":"LuatosC3","GPIO":[1,6210,736,704,1,1,800,768,1,1,8736,0,544,1,0,0,0,0,1,1,1,1],"FLAG":0,"BASE":1}

:H,ST7735S,160,80,16,SPI,1,7,2,3,6,11,10,*,16
:S,2,1,1,0,30,30
:I
01,80
11,80
B1,3,01,2C,2D
B2,3,01,2C,2D
B3,6,01,2C,2D,01,2C,2D
B4,1,07
C0,3,A2,04,84
C1,1,C5
C2,2,0A,00
C3,2,8A,2A
C4,2,8A,EE
C5,1,0E
20,0
36,1,C8
3A,1,05
2A,4,00,02,00,7F
2B,4,00,01,00,7F
E0,10,02,1C,07,12,37,32,29,2D,29,25,2B,39,00,01,03,10
E1,10,03,1D,07,06,2E,2C,29,2D,2E,2E,37,3F,00,00,02,10
13,80
29,80
:o,28
:O,29
:A,2A,2B,2C,16
:R,36
:0,60,00,00,00
:i,20,21
:B,60,1
#

[Jason2866]

@gemu2015 Can you help?

[gemu2015]

ok try to change this line in descriptor
:0,60,00,00,00
to
:0,60,00,18,00

[Jason2866]

@gemu2015 Thx! Works now :-)

The working display.ini

:H,ST7735S,160,80,16,SPI,1,7,2,3,6,11,10,*,16
:S,2,1,1,0,30,30
:I
01,80
11,80
B1,3,01,2C,2D
B2,3,01,2C,2D
B3,6,01,2C,2D,01,2C,2D
B4,1,07
C0,3,A2,04,84
C1,1,C5
C2,2,0A,00
C3,2,8A,2A
C4,2,8A,EE
C5,1,0E
20,0
36,1,C8
3A,1,05
2A,4,00,02,00,7F
2B,4,00,01,00,7F
E0,10,02,1C,07,12,37,32,29,2D,29,25,2B,39,00,01,03,10
E1,10,03,1D,07,06,2E,2C,29,2D,2E,2E,37,3F,00,00,02,10
13,80
29,80
:o,28
:O,29
:A,2A,2B,2C,16
:R,36
:0,60,00,18,00
:i,20,21
:B,60,1
#

[barbudor]

Hi @Jason2866
Just started mine uisng your display.ini
I haven't been far for now but I've noticed some random pixels on the 1 or 2 bottom lines as well as 1 or to right columns.
Do you see the same ?

[Jason2866]

No, I don't have ghost pixels. Tried reducing Display clock?

[booroondook-eng]

Hi all! I have Luatos ESP32C3 board and Air101-LCD display.
What firmware should I use for this board? I was looking for "...32c3-display..." and "...32c3-lvgl..." firmware, but I couldn't find anything.
I also wanted to compile the firmware by myself using PlatformIO, but I don't know what files need to be edited to change the configuration to support such a display.

[Jason2866]

You find it in my unofficial builds https://jason2866.github.io/Tasmota-specials/
Look for LVGL

[booroondook-eng]

Thank you very much!
P.S. But now I have black screen on my Air101-LCD. When I put display.ini file into board's filesystem I have black screen too.
But when I change template to...
{"NAME":"LuatosC3","GPIO":[1,6210,736,704,1,1,800,768,1,1,8736,0,544,1,0,0,0,0,1,1,1,1],"FLAG":0,"BASE":1}
(as described in the firtst message of this thread), then immediately after reboot I see the text "ST7735S" on a white background and this view blinks three times and then goes out and I see a black screen again.
Also, now I can't go into the Consoles menu because it causes a reboot.
To avoid this, I select the ESP32C3(1) template in the configuration menu. Then I can access the console again, but my display goes permanently black again.

[sfromis]

Check that your power source is sufficient, otherwise, you have a cause for such issues.

[Jason2866]

Try with: :B,60,0 this disables DMA.

[booroondook-eng]

Thanks!!!

[barbudor]

I also had to disable DMA, otherwise the C3 was rebooting everytime I was getting on the "Consoles" menu
Any other web page is ok, only /mn? makes the C3 to reboot

I still have those bad pixels on the bottom line and the rightmost column
Also the curve seem to be inverted
Displaytext [B0C65535z]Hello writes black on white
Displaytext [B65535C0z]Hello writes white on black
And colors are swapped: BGR instead of RGB

I tried to reduce the SPI clock from 16 to 8MHz but it didn't changed anything for the bad pixels
I can't seem to find any settings in display.ini about the curve and the RGB order

Any hints ?

[xostia]

Not all the Air101-LCD are the same. If you have the one with the black (in the top) joystick, the LCD itself is different (in my case, I have both, and the one with the black dot in the joystick has no text about the model on the board). For the black one, check this display.ini

The RGB is inverted in this other model... and it seems to have a bit higher resolution.

:H,ST7735S,161,83,16,SPI,1,,,,,,,*,16
:S,-1,1,1,0,0,0
:I
01,80
11,E0
B1,3,02,35,36
B2,3,02,35,36
B3,6,02,35,36,02,35,36
B4,1,07
B6,2,B4,F0
C0,3,A2,02,84
C1,1,C5
C2,2,0A,00
C3,2,8A,2A
C4,2,8A,EE
C5,1,06
36,1,C8
E0,10,12,1C,10,18,33,2C,25,28,28,27,2F,3C,00,03,03,10
E1,10,12,1C,10,18,2D,28,23,28,28,26,2F,3B,00,03,03,10
F0,1,01
F6,1,00
3A,1,05
2A,4,00,02,00,81
2B,4,00,03,00,82
29,E0
:o,28
:O,29
:A,2A,2B,2C,16
:R,36
:0,68,00,18,00
:1,CC,18,00,01
:2,A8,00,18,02
:3,08,18,00,03
:i,21,20
:B,60,0

:i,20,21 (and 161,83 first line for joystick white) :i,21,20 (and 160,80 first line for joystick black)

[xostia]

Another detail about the Air101 LCDs. Theorically GPIO11 is to switch on and off the backlight but GPIO11 is not configurable from Tasmota (because GPIO11 is SPI_VCC and it powers the flash chip?). I was testing and connecting the "BL" pin to other free GPIO of the ESP32, you can switch on and off the light of the screen. Even defining the GPIO TEMPLATE in the code, Tasmota does not care about the configuration of GPIO11 (with GPIO 255 you can see that).

If someone can clarify/explain this better, I would thank you.

[Jason2866]

@arendst Can you change for the C3 the Gpio11 pin available as red labeled?

[arendst]

I will.

[arendst]

Done. See latest dev branch

[vvvyky]

完成了。查看最新开发分支

完成了。查看最新开发分支

How to fix C3 using Gpio11？

[Jason2866]

@vvvyky Do as described #18350 (reply in thread)