编译alsa-lib, alsa-util以使用声卡:
3.1 alsa-lib :
sudo mv /usr /usr_bak
export PATH=/usr_bak/local/sbin:/usr_bak/local/bin:/usr_bak/sbin:/usr_bak/bin:/sbin:/bin:/usr_bak/games:/usr_bak/local/arm/4.3.2/bin
./configure --host=arm-linux
make
sudo mkdir /usr
sudo chown book:book /usr
make install
sudo cp -rf /usr /work/projects/alsa/
sudo rm -rf /usr
sudo mv /usr_bak /usr
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/arm/4.3.2/bin
把头文件和库复制进交叉工具链里
cd /work/projects/alsa/usr/include
sudo cp * -rfd /usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/usr/include
cd /work/projects/alsa/usr/lib
sudo cp * -rfd /usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/armv4t/lib
把库复制到根文件系统的lib目录下
cd /work/projects/alsa
sudo -rfd usr /work/nfs_root/fs_mini_mdev_new
3.2 alsa-util
3.2.1 先编译依赖：ncurses-5.9.tar.gz
./configure --host=arm-linux --prefix=$PWD/tmp --with-shared
make && make install
把头文件和库复制进交叉工具链里
cd /work/projects/alsa/ncurses-5.9/tmp/include/ncurses
sudo cp * -rfd /usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/usr/include
cd /work/projects/alsa/ncurses-5.9/tmp/include/
sudo cp * -rfd /usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/usr/include
cd /work/projects/alsa/ncurses-5.9/tmp/lib
sudo cp * -rfd /usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/armv4t/lib
把库复制到根文件系统的lib目录下
cd /work/projects/alsa/ncurses-5.9/tmp/lib
sudo cp *so* -rfd /work/nfs_root/fs_mini_mdev_new/lib
3.2.2 编译alsa-util:
./configure --host=arm-linux --prefix=$PWD/tmp --with-curses=ncurses --disable-xmlto --disable-nls
make
sudo make install
3.2.3 测试
mkdir /dev/snd
cd /dev/snd/
ln -s /dev/controlC0
ln -s /dev/pcmC0D0p
ln -s /dev/pcmC0D0c
播放:
aplay Windows.wav
调音量:
amixer controls
amixer cget numid=1
amixer cset numid=1 30
