I am trying to test a nRF5340 with a 1.3 inch waveshare 240x240 display using a st7789 driver. How would I connect the display to the board:
|
VCC |
3.3v |
|
GND |
Ground |
|
DIN |
Serial Data |
|
CLK |
Serial Clock |
|
CS |
Chip Select |
|
DC |
Data Command/Control |
|
RST |
Reset |
|
BL |
Backlight |
and create an overlay file representing the display connections?
lcj said:How does the backlight (BL) connect to the board and where is it referenced in the overlay?
It looks like the backlight is not refernced in the overlay.
What you could do is to choose a free pin and implement the control of this, either in your application or you could modify the driver.
I also searched the datasheet for 'backlight' and found this:
Perhaps it is possible to turn on or dim the backlight from the SPI interface?
I also noticed there is an overlay named st7789v_waveshare_240x240.overlay in the SDK. Have you tried that one?
