imx6q 驱动开发

最新推荐文章于 2025-07-13 15:39:10 发布

lonnox

最新推荐文章于 2025-07-13 15:39:10 发布

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分类专栏： linux

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本文详细介绍了在嵌入式系统中配置LED、LCD显示及声卡驱动的方法。包括LED驱动的DTS配置，LCD的分辨率设置与触摸屏校准，以及声卡驱动的编译与安装过程。

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一、leds驱动
vim imx6q-arm2.dts
根节点中添加：
leds {
compatible = "gpio-leds";

   debug-led {
           label = "Heartbeat";
           gpios = <&gpio3 21 0>;
           linux,default-trigger = "heartbeat";
   };
   led5 {
                   label = "led5";
                   gpios = <&gpio3 23 0>;
                   default-state = "off";
   };

   led6 {
                   label = "led6";
                   gpios = <&gpio3 22 0>;
                   default-state = "on";
   };

};

测试leds
cd /sys/bus/platform/devices/leds/leds/led5
echo 1 > brightness
echo 0 > brightness

二、LCD驱动

查看分辨率：cat /sys/class/graphics/fb0/mode

tslib环境设置方式
//ts设备文件(触摸屏):event0
//校验文件(calibrate file),存放校验值
//配置文件
//插件文件
//fb设备文件(LCD):fb0
//终端控制台设为NULL
export TSLIB_TSDEVICE=/dev/input/event0
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_PLUGINDIR=/lib/ts
export TSLIB_CONSOLEDEVICE=none
export TSLIB_FBDEVICE=/dev/fb0
ts_calibrate

安装libiconv
下载 http://ftp.gnu.org/gnu/libiconv/libiconv-1.15.tar.gz 0000
./configure -prefix=$PWD/_install -host=arm-linux-gnueabihf
make
make install
把_install/lib 下的preloadable_libiconv.so 拷到系统的/system/lib 下,
export LD_PRELOAD=/lib/libts.so:/lib/preloadable_libiconv.so

设置QT运行环境
export QTEDIR=/usr/qt5.11.2
export LD_LIBRARY_PATH=QTEDIR/lib:$LD_LIBRARY_PATH
export QT_QPA_GENERIC_PLUGINS=tslib:/dev/input/event1
export set QT_QPA_FONTDIR=$QTEDIR/lib/fonts
export QT_QPA_PLATFORM_PLUGIN_PATH=$QTEDIR/plugins
export QT_QPA_PLATFORM=linuxfb:fb=/dev/fb0:size=800x480:mmSize=800x480:offset=0x0:tty=/dev/ttymxc0
export QT_QPA_FB_TSLIB=1

//export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event1
//export QT_QPA_GENERIC_PLUGINS=evdevmouse:/dev/input/event2

三、声卡驱动

1、下载lib
ftp://ftp.alsa-project.org/pub/lib/alsa-lib-1.1.7.tar.gz
tar jxf alsa-lib-1.1.7.tar.gz
./configure --host=arm-linux-gnueabihf --prefix=/home/lonnox/work/tools/_install

2、下载utils
ftp://ftp.alsa-project.org/pub/utils/alsa-utils-1.1.7.tar.bz2
tar jxf alsa-utils-1.1.7.tar.bz2
cd alsa-utils-1.1.7
./configure --host=arm-linux-gnueabihf --prefix=/home/lonnox/work/tools/alsa-utils-1.1.7/arm-alsa --with-alsa-inc-prefix=/home/lonnox/work/tools/alsa_lib_install/include --with-alsa-prefix=/home/lonnox/work/tools/alsa_lib_install/lib --disable-alsamixer --disable-xmlto
make
sudo make install