alsa 向mini2440移植

下載
http://www.alsa-project.org/main/index.php/Download

記得下載較新的工具包和庫。

交叉編譯 alsa-lib
./configure --host=arm-none-linux-gnueabi --prefix=/usr/share/arm-alsa   
make & make install                                                                                        

交叉編譯 alsa-utils
./configure --host=arm-none-linux-gnueabi --with-alsa-inc-prefix=/usr/share/arm-alsa/include -- with-alsa-prefix=/usr/share/arm-alsa/lib --without-alsamixer // avoid the ncurses lib

如果出錯將without    改爲 disable

然後在alsaconfig/po/下   mkdir      t-ja.gmo文件夾

chmod 777 t-ja.gmo

make

Copy lib to target board
cp -avr /usr/share/arm-alsa {$rootfs}/usr/share/arm-alsa

環境變量
export ALSA_CONFIG_PATH=/usr/share/arm-alsa/share/alsa/alsa.conf                                        
未添加環境變量前出現的錯誤：
~ # ./aplay
ALSA lib conf.c:2827:(snd_config_hook_load) cannot access file /usr/share/arm-alsa/share/alsa/cards/aliases.conf
ALSA lib pcm.c:1959:(snd_pcm_open_conf) Invalid type for PCM default definition (id: default, value: cards.pcm.default)
aplay: main:533: audio open error: Invalid argument
~ # ./aplay
ALSA lib pcm.c:2090:(snd_pcm_open_noupdate) Unknown PCM default
aplay: main:533: audio open error: No such file or directory

交叉編譯其他程序：
Add included file in program: #include <alsa/asoundlib.h>
~# arm-none-linux-gnueabi-gcc -lasound -L/usr/share/arm-alsa/lib/ -I/usr/share/arm-alsa/include/ -o test my_test.c