McASP underrun error depending on LCD size

shigehiro tsuda

Other Parts Discussed in Thread: AM3358

Hi,

When our customer work the LCD of the size of WXGA output and an audio output in AM3358 board, underrun error of McASP occurs.

When they work the LCD of the size of WVGA output and an audio output , this error does not occur.

They use EDMA and FIFO in McASP.

Will there be any solution?
I think that load of the DDR influences it.

Best Regards,
Shigehiro Tsuda

0 Biser Gatchev-XID over 7 years ago

Hi,

What software are you using?

0 Biser Gatchev-XID over 7 years ago in reply to Biser Gatchev-XID

What is the processor, what is the LCD resolution and frame rate, what is the audio format? Please provide complete information if you want feedback.

0 Brad Griffis over 7 years ago in reply to Biser Gatchev-XID

Try setting PR_OLD_COUNT = 0x30 like this thread:

e2e.ti.com/.../1058091

0 shigehiro tsuda over 7 years ago in reply to Biser Gatchev-XID

Hi Biser,

Thank you for quick reply.

I'm sorry. The answer to your question was late.

Our customer use AM3358 processor and 3rd-party OS.

LCD resolution is 1280x800 and this frame rate is 60 .

Audio format :I2S 8kHz or 16kHz 16bit stereo wave format

Best Regards,

Shigehiro Tsuda

0 shigehiro tsuda over 7 years ago in reply to Brad Griffis

Hi Brad,

Thank you for quick reply.
I have our customer try it.

Best Regards,
Shigehiro Tsuda

Processors forum