[#5025] AD1981 sometimes gets bad quality sound and would reset after a long time play.

Submitted By: Cliff Cai

Open Date

2009-03-30 05:34:32 Close Date

2009-11-17 22:20:39

Priority:

Medium High Assignee:

Cliff Cai

Status:

Closed Fixed In Release:

2008R1.5-RC3

Found In Release:

2008R1-RC8 Release:

08r1

Category:

Drivers Board:

N/A

Processor:

BF537 Silicon Revision:

all

Is this bug repeatable?:

Yes Resolution:

Out of Date

Uboot version or rev.:

Toolchain version or rev.:

08r1

App binary format:

N/A

Summary: AD1981 sometimes gets bad quality sound and would reset after a long time play.

Details:

see: blackfin.uclinux.org/gf/project/uclinux-dist/forum/?action=ForumBrowse&forum_id=39&_forum_action=ForumMessageBrowse&thread_id=32179

Follow-ups

--- Cliff Cai 2009-04-17 04:56:14

it seems that this problem is caused by the content of dummy buffer,

sometimes the codec doesn't understand the frame sent to it,when DMA is the

switched to dummy buffer.I will do more tests to verify it.

--- Cliff Cai 2009-06-24 23:10:18

fixed,sendind out the remaining data in TX FIFO when stop sport.

Cliff

--- Vivi Li 2009-07-29 04:24:39

When I test ad1980 power case on bf548-ezkit with 09r1, sometimes command

"vrec -w -S -b 16 -s 48000 |vplay" gives high pitch noise, like tone.

Stop it and run again, it will get back to normal.

I built ad1980 as module.

--- Cliff Cai 2009-08-02 21:38:30

I've taken this into account,the module case was ignored before.

Cliff

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