Hi.
I did this but the screen is always blank.
I read another post about Rock3C it says that I cant use the same PIN for CS0:
“it appears on the Rock 3C, at least with my version, enabling SPI locks the user from changing the pin state, so the display didn’t know when it was receiving commands or data (always thought it was data), meaning that it wasn’t initializing correctly.”
Post About SPI in Rock3C
I have a ST7789 also.
But bombusT didn’t tell where to put the pins.
What if we try to use ST7789? Could you please check over BombusT post and see if you can find wich pins did he use?
It seems that he only activated the original SPI overlay and did the rest in python coding.
He used:
import numbers
import time
import numpy as np
import spidev
import gpiod
And the example was:
# Example usage:
if _ name _ == “_ main _”:
# Specify the SPI port, CS, DC, and other parameters
port = 3
cs = 0
dc = 10 # Set this to whatever pin you want to connect (you cannot use pin 21 on the Rock 3C)
backlight = 19 # This is the same pin location as on the R pi, but do whatever you want.
rst = None
rotation=180
width = 320
height = 240
spi_speed_hz=60 * 1000 * 1000