2010-04-26 09:24:00     Audio function on BF537 ez-kit

Document created by Aaronwu Employee on Aug 21, 2013
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2010-04-26 09:24:00     Audio function on BF537 ez-kit


Message: 88902   


Dear guys,


BF537 Ezkit has ad1854 and ad1871. I want to realize a simple 'talkthrough' application before further work. But I met some problem. By default they are not drived up. So on the target board I got these:


root:/> tone

ERROR: failed to open DAC device /dev/dsp


root:/> ls /dev/dsp

ls: /dev/dsp: No such file or directory



/dev/dsp doesn't exist. Did I forget some configurations in Sound Card Support? Does this mean that I have to fixed the drivers stuff by myself? Where can I find the audio driver for Ezkit, or how can I write them?


There is another problem:


If I want to develop a customized audio daughter board include 8 input channels, which is the easier way in term of driver development? 1), 4 Cascaded stereo codecs (AD73322L); 2), four independed stereo codecs (ADAU1361) linked to four I2S ports on SPORT0.


Is there some reference design before? I need your advice.


Thanks in advance.






2010-04-26 12:52:51     Re: Audio function on BF537 ez-kit

Mike Frysinger (UNITED STATES)

Message: 88910   


please read the documentation wrt bf537-ezkit: