i.MX ProcessorsのトピックRandom stop audio playback on SGTL5000

Random stop audio playback on SGTL5000

giacomomola — Thu, 16 Feb 2017 08:14:34 GMT

Hello,
I have a custom board with imx28 (287) and sgtl5000, kernel 4.
sound codec sgtl5000.

while in playback while performing a song at random
the audio stops feeling.

the kernel hooks the codec properly start and for a while everything seems to work as it should.

some advice??

thank you

excuse for my easy english

Giacomo

Re: Random stop audio playback on SGTL5000

giacomomola — Thu, 16 Feb 2017 15:12:42 GMT

I verified,
when he stops playing records

ANA_CTRL (0x0024) and ANA_POWER (0x0030) of SGTL return to their default values 0x0111 and 0x7060, with devices switched off.

why can go to reset or return to the default values in those registers

thank you

Giacomo

Re: Random stop audio playback on SGTL5000

art — Tue, 21 Feb 2017 09:27:55 GMT

It might be the effect of the SGTL5000 silicon erratum in case of using the internal VDDD regulator. Please check. The erratum itslef is described in the SGTL5000 Silicon Errata document, available on the SGTL5000 Documentation web page:

http://www.nxp.com/products/media-and-audio-processing/data-converters/audio-converters/audio-codec/ultra-low-power-audio-codec:SGTL5000?tab=Documentation_Tab

Have a great day,
Artur

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Re: Random stop audio playback on SGTL5000

giacomomola — Tue, 21 Feb 2017 13:43:35 GMT

Hello,
the problem was derived from a grounded inductor disorders and cleared it led into the chip.
solved

thank you
regards

Giacomo