DS90UB949A-Q1EVM: DS90UB949A-Q1EVM playing audio via I2S interface

Anurag Singh

Intellectual 335 points

Part Number: DS90UB949A-Q1EVM

Hi,

I am trying to test I2S interface on DS90UB949A-Q1EVM.

after setting following registers bit 1 to "1"

0x12 [1] to 1

0x54 [1] to 1

I am able to get output only after setting FPD-Link III mode to "Legacy".

Request you to explain which register controls FPD link III mode and how I can programmatically set it to "Legacy" ?

Regards,

Anurag

over 3 years ago

0 Jack Scherlag over 3 years ago

TI__Mastermind 41945 points

Hi Anurag,

When the FPD Link III mode is set to legacy, registers 0x12 is set to 0x2 and 0x1A is set to 0x0. Can you confirm that 5.1 or 7.1 channel audio is not enabled?

Regards,

Jack

0 Anurag Singh over 3 years ago in reply to Jack Scherlag

Intellectual 335 points

Hi Jack,

Do you mean register 0x1A ?

Regards,

Anurag

+1 Jack Scherlag over 3 years ago in reply to Anurag Singh

TI__Mastermind 41945 points

Hi Anurag,

Yes. Try disabling I2S_SURROUND.

Regards,

Jack

0 Anurag Singh over 3 years ago in reply to Jack Scherlag

Intellectual 335 points

Hi Jack,

That worked.

What you would suggest correct sequence of setting these registers.

For now I followed following sequence

set bit 1 to "1" for 0x12

set bit 1 to "1" for 0x54

set bit 0 to "0" for 0x1A

Regards,

Anurag

0 Jack Scherlag over 3 years ago in reply to Anurag Singh

TI__Mastermind 41945 points

Hi Anurag,

For those registers, there is no particular order needed for programming. If the sequence you have been using works, there is no need to change it.

Regards,

Jack

0 Anurag Singh over 3 years ago in reply to Jack Scherlag

Intellectual 335 points

Hi Jack,

Thanks for quick response.

Regards,

Anurag

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DS90UB949A-Q1EVM: DS90UB949A-Q1EVM playing audio via I2S interface