Joy-it SBC-LCD01, Быстрый старт

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3. Use with a Framebuffer
We explain here how to set up the framebuffer fbcp - ili9341 to use it with
this LCD screen. This library was published under the MIT - Lizenz .
You must first deactivate SPI, if you have activated it earlier. Therefore,
go back to the configuration of the Raspberry Pi.
sudo raspi - config
There you deactivate SPI under
5 Interfacing Options
→
P4 SPI
. Now
you have to edit the
config.txt and comment out a command. You open
the
config.txt with :
sudo nano /boot/config.txt
There you remove the hash at hdmi_force_hotplug=1 . You can save with
CTRL + O and leave the editor with CTRL + X. Now you must restart the
Raspberry Pi with the following command.
sudo reboot
Now you can install fbcp - ili9341 by executing the following commands
one after the other:
sudo apt - get install cmake
cd
~
git clone clone https://github.com/juj/fbcp - ili9341.git
cd fbcp - ili3941
mkdir build
You must edit the
display.h before continuing with the setup. Therefore,
open the
display.h with the following command:
sudo nano display.h
There you exchange line 83
#
define DISPLAY_SPI_DRIVE_SETTINGS ( 0 )
with
# define DISPLAY_SPI_DRIVE_SETTINGS ( 1 | BCM2835_SPI0_CS_CPOL | BCM2835_SPI0_CS_CPHA)
#ifndef DISPLAY_SPI_DRIVE_SETTINGS
#define DISPLAY_SPI_DRIVE_SETTINGS (1 | BCM2835_SPI0_CS_CPOL | BCM2835_SPI0_CS_CPHA)
#endif
You save again with CTRL + O and leave the editor with CTRL + X. You can
now continue with the setup by executing the following commands one
after the other.
cd build
cmake - DST7789VW=ON - DGPIO_TFT_DATA_CONTROL=25 - DGPIO_TFT_RESET_PIN=27 -
DGPIO_TFT_BACKLIGHT=18 - DSPI_BUS_CLOCK_DIVISOR=8 - DBACKLIGHT_CONTROL=ON ..
make - j
sudo ./fbcp - ili9341
Now you will see your desktop on your 1.3" display.