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BF-537 EZKIT driver for AD1854 or how to use AD194x driver

Question asked by MartinS on Aug 6, 2013
Latest reply on Aug 8, 2013 by MartinS

Hi

 

I have BF-537 EZKIT.  I would like to use the onboard DAC AD1854.  I saw posts people had success using the AD194x driver, but unfortunately nobody has actually documented what needs to be done.

 

I have compiled an image, (attached .config + .config_custo_linux), but it appears that no sound cards are found

 

root:/> aplay -l

aplay: device_list:252: no soundcards found...

 

root:/> ls -l /sys/module/snd/holders

lrwxrwxrwx    1 root     root             0 Feb 27 08:45 snd_mixer_oss -> ../../

snd_mixer_oss

lrwxrwxrwx    1 root     root             0 Feb 27 08:45 snd_pcm -> ../../snd_pc

m

lrwxrwxrwx    1 root     root             0 Feb 27 08:45 snd_pcm_oss -> ../../sn

d_pcm_oss

lrwxrwxrwx    1 root     root             0 Feb 27 08:45 snd_soc_core -> ../../s

nd_soc_core

lrwxrwxrwx    1 root     root             0 Feb 27 08:45 snd_timer -> ../../snd_

timer

 

root:/> lsmod|grep '^snd'

snd_soc_ad193x          5841  0

snd_ad1836              1405  0

snd_ad193x              1249  0

snd_soc_core           70987  3 snd_soc_ad193x,snd_ad1836,snd_ad193x

snd_pcm_oss            34734  0

snd_pcm                51416  2 snd_soc_core,snd_pcm_oss

snd_page_alloc          3229  1 snd_pcm

snd_timer              13220  1 snd_pcm

snd_mixer_oss          10711  1 snd_pcm_oss

snd                    38588  5 snd_soc_core,snd_pcm_oss,snd_pcm,snd_timer,snd_m

ixer_oss

 

root:/> ls /dev/snd

timer

 

oot:/> aplay

ALSA lib confmisc.c:768:(parse_card) cannot find card '0'

ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_card_driver return

ed error: No such file or directory

ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings

ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_concat returned er

ror: No such file or directory

ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name

ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_refer returned err

or: No such file or directory

ALSA lib conf.c:4720:(snd_config_expand) Evaluate error: No such file or directo

ry

ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM default

aplay: main:682: audio open error: No such file or directory

root:/>

 

What commands do I need to issue for the system to recognize/load AD194x driver to use it with AD1854 DAC? 

 

Best Regards

 

Martin

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