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Do I need this pin? ST7789 DC pin?
Posted: Sun Apr 28, 2024 6:33 pm
by MJU20
I've got a LilyGo T8 V1.1 board with a ESP32-S2 chip and a ST7789 display onboard.
In the properties for the ST7789 display I can not disable the DC pin
- st7789-1.jpg (67.35 KiB) Viewed 3858 times
The board doesn't seem to have a DC pin attached to the display.
The display isn't working maybe because of this non existing pin?
Any ideas about this problem?
Re: Do I need this pin? ST7789 DC pin?
Posted: Mon Apr 29, 2024 7:19 am
by mnfisher
The display does use a D/C pin (to select data or command)
They have maybe missed it from the diagram?
Re: Do I need this pin? ST7789 DC pin?
Posted: Mon Apr 29, 2024 8:43 am
by medelec35
Hello.
I have read that the documentation has errors.
Can you try the following:
CS - 34 (B2)
DC - 37 (B5)
RST - 38 (B6)
LED BL - 33 (B1)
MOSI - 35 (B3)
CLK 36 (B4)
MISO -Any unused pin as not used.
I have not got the hardware to confirm the above connections, So I can't guarantee it will work.
Re: Do I need this pin? ST7789 DC pin?
Posted: Mon Apr 29, 2024 5:19 pm
by MJU20
Thank you both!!
But this doesn't work either..
It seems that the DC pin is not used on the display?
Strange because fresh out of the box it works by showing the LilyGo logo on the screen..
- st7789.jpg (98.78 KiB) Viewed 3825 times