FAQ: [#6888] Under run and over run may happen for ad1836/ad1938 in 2011r1(2011)

[#6888] Under run and over run may happen for ad1836/ad1938 in 2011r1

Submitted By: Vivi Li

Open Date

2011-11-18 02:01:09

Priority:

Medium Assignee:

Scott Jiang

Status:

Open Fixed In Release:

N/A

Found In Release:

2011R1 Release:

Category:

N/A Board:

N/A

Processor:

BF537 Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Assigned (Not Start)

Uboot version or rev.:

Toolchain version or rev.:

gcc4.3-2011R1-RC2

App binary format:

N/A

Summary: Under run and over run may happen for ad1836/ad1938 in 2011r1

Details:

I can see under run happen on regression machine for ad1836 on bf537-stamp.

On bf533-stamp, overrun may happen.

Bellow is the log on 537-stamp. It's difficult to reproduce on bf537.

root:/> arecord -f S24_LE -r 48000 -c 1 -t wav -d 5|aplay

Recording WAVE 'stdin' : Signed 24 bit Little Endian, Rate 48000 Hz, Mono

Playing WAVE 'stdin' : Signed 24 bit Little Endian, Rate 48000 Hz, Mono

tx dma is already stopped

sport status error: TUVF

root:/>

Bellow is the log on bf533-stamp.

root:/> arecord -f S32_LE -r 48000 -c 1 -t wav -d 5|aplay

Recording WAVE 'stdin' : Signed 32 bit Little Endian, Rate 48000 Hz, Mono

Playing WAVE 'stdin' : Signed 32 bit Little Endian, Rate 48000 Hz, Mono

overrun!!! (at least 0.030 ms long)

root:/>

Follow-ups

--- Vivi Li 2011-11-22 03:22:39

Under run may also happen with ad1938 on bf537-stamp.

arecord -f S16_LE -r 48000 -c 2 -t wav -d 5|aplay

Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo

Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo

sport status error: TUVF

root:/>

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