Difference between revisions of "Template:S5Pxx18-SPI-2.8TFT"
(→在S5P4418/S5P6818平台使用SPI 2.8寸屏) |
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| − | === | + | ===Connect SPI 2.8"LCD to S5P4418/S5P6818 Based Board=== |
| − | + | The following steps only apply to Kernel Linux-4.4. We took the NanoPi Fire3 as an example. Run the following commands to initialize FriendlyElec's 2.8" SPI LCD. | |
| + | These commands need to be run only once. | ||
<syntaxhighlight lang="bash"> | <syntaxhighlight lang="bash"> | ||
sudo mount /dev/mmcblk0p1 /boot | sudo mount /dev/mmcblk0p1 /boot | ||
| Line 12: | Line 13: | ||
sudo reboot | sudo reboot | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | Note: the "s5p6818-nanopi3-rev05.dtb" file is the kernel dtb file for the NanoPi Fire3. For another board you need to check its system's "/sys/devices/platform/board/info" file to figure out its dtb file.: <br /> | |
<syntaxhighlight lang="bash"> | <syntaxhighlight lang="bash"> | ||
cat /sys/devices/platform/board/info | cat /sys/devices/platform/board/info | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | Here is the info file's content for the NanoPi Fire3: <br /> | |
Hardware : NANOPI3<br /> | Hardware : NANOPI3<br /> | ||
Revision : 0005<br /> | Revision : 0005<br /> | ||
Serial : fa6818dba7110739<br /> | Serial : fa6818dba7110739<br /> | ||
| − | + | The "Hardware" here is "NANOPI3", "Revision" is "0005", "CPU" is "S5P6818", therefore the NanoPi Fire3's kernel dtb file name is "s5p6818-nanopi3-rev05.dtb".<br /> | |
<br /> | <br /> | ||
配置完dtb文件，重启开发板后，可以用lsmod命令检查下是否加载了fb_st7789v模块： | 配置完dtb文件，重启开发板后，可以用lsmod命令检查下是否加载了fb_st7789v模块： | ||
Revision as of 06:28, 15 December 2017
1 Connect SPI 2.8"LCD to S5P4418/S5P6818 Based Board
The following steps only apply to Kernel Linux-4.4. We took the NanoPi Fire3 as an example. Run the following commands to initialize FriendlyElec's 2.8" SPI LCD.
These commands need to be run only once.
sudo mount /dev/mmcblk0p1 /boot sudo apt-get update sudo apt-get install device-tree-compiler sudo fdtput /boot/s5p6818-nanopi3-rev05.dtb spi0/spidev@0 status -t s "disabled" sudo fdtget /boot/s5p6818-nanopi3-rev05.dtb spi0/spidev@0 status sudo fdtput /boot/s5p6818-nanopi3-rev05.dtb spi0/fbtft@0 status -t s "okay" sudo fdtget /boot/s5p6818-nanopi3-rev05.dtb spi0/fbtft@0 status sudo reboot
Note: the "s5p6818-nanopi3-rev05.dtb" file is the kernel dtb file for the NanoPi Fire3. For another board you need to check its system's "/sys/devices/platform/board/info" file to figure out its dtb file.:
cat /sys/devices/platform/board/info
Here is the info file's content for the NanoPi Fire3:
Hardware : NANOPI3
Revision : 0005
Serial : fa6818dba7110739
The "Hardware" here is "NANOPI3", "Revision" is "0005", "CPU" is "S5P6818", therefore the NanoPi Fire3's kernel dtb file name is "s5p6818-nanopi3-rev05.dtb".
配置完dtb文件，重启开发板后，可以用lsmod命令检查下是否加载了fb_st7789v模块：
lsmod正常会输出如下内容：
Module Size Used by
fb_st7789v 3315 0
fbtft 31881 1 fb_st7789v
以及用dmesg命令可以查看到SPI屏已经被初始化为fb1设备:
dmesg | grep fb_st7789v
正常会输出如下内容：
[ 6.728000] fb_st7789v: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.908000] graphics fb1: fb_st7789v frame buffer, 320x240, 150 KiB video memory, 4 KiB buffer memory, fps=35, spi0.0 at 50 MHz
接下来要做的事情就比较简单了，无论是运行Qt，还是X-Windows，只需要正确设置Framebuffer设备为fb1即可。
1.1 在2.8寸屏上运行Lubuntu桌面
在 lubuntu desktop系统里执行以下操作:
首先删除armsoc的配置文件：
sudo rm -f /usr/share/X11/xorg.conf.d/20-armsoc.conf
然后新建一个配置文件 /etc/X11/xorg.conf:
sudo vi /etc/X11/xorg.conf
内容如下：
Section "Monitor" Identifier "Primary" VendorName "FriendlyARM" EndSection Section "Device" Identifier "Primary" Driver "fbdev" Option "fbdev" "/dev/fb1" EndSection
重启后可以看到图像:
目前暂时不支持触摸屏，可使用鼠标和键盘操作。
1.2 在2.8寸屏上运行Qt程序
在friendly-core系统终端里执行以下命令，运行一个Qt示例:
. setqt5env export QT_QPA_PLATFORM=linuxfb:fb=/dev/fb1 export QT_QPA_EGLFS_TSLIB=1 export QT_QPA_GENERIC_PLUGINS=tslib,evdevkeyboard $QTDIR/examples/widgets/widgets/tetrix/tetrix
Qt示例画面如下所示：
目前暂时不支持触摸屏，可使用鼠标和键盘操作。
