PKG_CONFIG_PATH="/usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/usr/lib/pkgconfig" LDFLAGS="-L/usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/armv4t/usr/lib -lpthread -lc -lgcc" CFLAGS="-I/usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/armv4t/usr/include" ./configure --host=arm-linux --target=arm-linux --prefix=/home/gyh/mybook/alsa-utils-prefix --disable-alsamixer --with-alsa-prefix=/usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/usr/lib/ --with-alsa-inc-prefix=/usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/usr/include/
将/home/gyh/mybook/alsa-utils-prefix目录拷贝到嵌入式文件系统的对应目录上。
（4）alsa配置
在启动脚本中添加：（可能您的不需要）
/bin/mkdir /dev/snd
/bin/ln -s /dev/pcmC0D0c /dev/snd/pcmC0D0c
/bin/ln -s /dev/pcmC0D0p /dev/snd/pcmC0D0p
/bin/ln -s /dev/controlC0 /dev/snd/controlC0
/bin/ln -s /dev/pcmC1D0c /dev/snd/pcmC1D0c
/bin/ln -s /dev/pcmC1D0p /dev/snd/pcmC1D0p
/bin/ln -s /dev/controlC1 /dev/snd/controlC1
/bin/ln -s /dev/seq /dev/snd/seq
/bin/ln -s /dev/timer /dev/snd/timer
modprobe.conf文件内容为
#for ALSA
alias char-major-116 snd
options snd cards_limit=2
alias snd-card-0 snd-soc-uda134x #换成您自己的
alias snd-card-1 snd-usb-audio
#for OSS
alias char-major-14 soundcore
alias sound-slot-0 snd-card-0
#OSS Emulation by ALSA
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias sound-slot-1 snd-card-1
alias sound-service-1-0 snd-mixer-oss
alias sound-service-1-1 snd-seq-oss
alias sound-service-1-3 snd-pcm-oss
alias sound-service-1-8 snd-seq-oss
alias sound-service-1-12 snd-pcm-oss
options snd-soc-uda134x index=0
options snd-usb-audio index=1
asound.conf里内容为
# asoc:uda134x
pcm.!dmix {
type dmix
ipc_key 5678293
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
period_size 2048
buffer_size 16384
format S16_LE
rate 48000
}
}
pcm.!dsnoop {
type dsnoop
ipc_key 5778293
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
period_size 2048
buffer_size 16384
format S16_LE
rate 48000
}
}
pcm.asymed {
type asym
playback.pcm "dmix"
capture.pcm "dsnoop"
}
pcm.!default {
type plug
slave.pcm "asymed"
}
pcm.dsp0 {
type plug
slave.pcm "asymed"
}
ctl.mixer0 {
type hw
card 0
}
（5）测试放音和录音
./aplay try.wav &
显示Playing WAVE 'try.wav' : Signed 16 bit Little .....
听到音乐了。
./arecord -t wav -f dat myrecord.wav
显示mapped channel 9 to 1
Recording WAVE 'myrecord.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Steo
对着麦克风说话，ctrl+C停止
./aplay myrecord.wav听到刚才说的话。
设置音量
./amixer set Master 50%
./amixer set Capture 50%
./alsactl store -f asound.state
在开机启动脚本中增加脚本使每次开机恢复设置，我增加的脚本如下：