5515 Half buffer DMA interrupt

Dimitry Skryabin

Hi!

Right now I'm trying to initialize DMA controller to work I2S port and with codec AIC3204 connected to this I2S port.
And I'm really wondered! There is no half buffer DMA interrupt!
May be I'm not able to find this interrupt?

over 15 years ago

0 TommyG over 15 years ago

TI__Genius 13045 points

di-sk,

There should be a DMA Peripheral Reference Guide (PRG) for the C5515, but I don't see it. Maybe it is not released yet. There is a mode in the C5515 DMA to setup Ping-Pong buffers which should give interrupts when either Ping or Pong buffer is available. You can get details by looking at VC5505 DMA PRG (http://www-s.ti.com/sc/techlit/sprufo9) and this Wiki page that explains the difference between the VC5505 and C5505/15 devices (http://processors.wiki.ti.com/index.php/TMS320VC5504/05_to_TMS320C5504/05/14/15_Migration). Look at the Device Migration Guide, Section 12.3.

Regards.

0 Dimitry Skryabin over 15 years ago in reply to TommyG

Prodigy 80 points

Thnak you!

I see only C5515 got the ping-pong buffer support, but I have VC5515 on my EVM5515 board :(

0 TommyG over 15 years ago in reply to Dimitry Skryabin

TI__Genius 13045 points

Are you sure you have a VC5515? As far as I know, there was no VC5515 ever released. Your EVM should have the C5515 device.

Regards.

0 TommyG over 15 years ago in reply to TommyG

TI__Genius 13045 points

I double checked with the C5000 IC team and found out that early versions of the C5515 were in fact labelled VC5515. So your EVM has same as C5515 DSP. The Ping-Pong buffer fix should work for you.

Regards.

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5515 Half buffer DMA interrupt