DM385 播放不出聲音

Byron Tien

Other Parts Discussed in Thread: TLV320AIC3104

你好,

我是使用DM385 IPNC3.5 + TLV320AIC3104 codec.想要實現聲音回放的動作(playback),整個過程中卡在snd_pcm_writei function裡出現了 EPIPE error(underrun occurred),但我嘗試使用aplay command將聲音直接播放是沒有問題的,代表硬體迴路應是沒有問題,請問playback出現這error,需要怎麼是分析問題呢?謝謝 !!

7 年多前

0 Chris Meng 7 年多前

TI__Guru**** 155073 points

你好，

请问你有参考过下面链接的信息么？
processors.wiki.ti.com/.../TI811X_PSP_AUDIO_Driver_User_Guide

0 Byron Tien 7 年多前回复 Chris Meng

Intellectual 560 points

你好,以下是我的設定, 請問有什麼地方需要修改的地方?

amixer -q cset name='PCM Playback Volume' 100%,100%
amixer -q sset 'Line DAC' 100%,100%
amixer -q sset 'Line Line2 Bypass' 0%,0%
amixer -q sset 'Line PGA Bypass' 0%,0%
amixer -q sset 'Mono' on

amixer -q sset 'Mono Line2 Bypass' 0%,0%
amixer -q sset 'Mono Mixer DACL1' on
amixer -q sset 'Mono Mixer PGAR Bypass' on

amixer -q sset 'AGC' off,on
amixer -q sset 'HP DAC' 100%,100%

amixer -q sset 'HP Line2 Bypass' 0%,0%
amixer -q sset 'HP PGA Bypass' 70%,70%

amixer -q sset 'HPCOM' off
amixer -q sset 'HPCOM DAC' 0%,0%
amixer -q sset 'HPCOM Line2 Bypass' 0%,0%
amixer -q sset 'HPCOM PGA Bypass' 0%,0%

amixer -q sset 'Left DAC Mux' 'DAC_L1'

amixer -q sset 'Left HPCOM Mixer DACL1' off

amixer -q sset 'Right HP Mixer DACR1' off
amixer -q sset 'Right HPCOM Mixer DACR1' off
amixer -q sset 'Right Line Mixer DACR1' off

amixer -q sset 'Right PGA Mixer Line1R' on
amixer -q sset 'Right Line1R Mux' 'differential'

amixer -q cset name='PGA Capture Volume' 0%,70%

＿

0 Chris Meng 7 年多前回复 Byron Tien

TI__Guru**** 155073 points

Hi,

Would you pls help to check below links?

e2e.ti.com/.../526124
arago-project.org/.../

处理器

处理器论坛

DM385 播放不出聲音