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TPS65930: DM3730 ARM- TPS65930 audio buffer delay

Part Number: TPS65930
Other Parts Discussed in Thread: DM3730, , OMAP3530

Hi,

we using TI DM3730 arm processor and TPS65930 chip as a sound card by using alsa library.

We are developing a delay sensitive application and we notice that  there is a large buffer delay when playing and recording audio .

The buffer delay is 140 ms and 1120 sample when the sample rate is set to 8000. Although we can modify this delay value by software modifications, the measured buffer delay does not go below this value.

Is there  any way to decrease audio buffer delay or this 140ms is the minimum buffer delay limit for this chip ?

The second question is that, is there any example application about playing/capturing audio by using DSP(c64x) and TPS65930 device? 

We consider that, DSP(c64x) application may not cause delay.

Omer,

  • Hi Omer,

    We recommend using an AM57x processor family rather than the older DM3730, partially because the TPS65930 and related family are now approaching 10 years since their catalog release, and are even older considering when their design was first started.

    If you haven't found it yet, the Technical Reference Manual for the TPS65930 is located here: www.ti.com/.../swcu052

    That will be the most likely path to a solution. I looked through it a bit but didn't see anything obvious from a buffer standpoint.

    I wouldn't recommend using this PMIC with anything other than the OMAP3530 or DM3730. It's behaviors are custom designed for the OMAP3530 and it is supposed to support related devices like DM3730. No new development is being supported for this PMIC at this time.