C5515 EZDSP

Paolo Martinetti

Expert 2730 points

Hi,

i need some help. I have trouble in managing I2S I/O with DMA (Ping Pong Buffer configuration).

Where can i find the correspondence between DMA channels 0...3 and I2S0 RX / TX?

Thanks in advance

Paolo

over 8 years ago

0 Cvetolin Shulev-XID over 8 years ago

TI__Guru 65405 points

Hi Paolo,

I've forwarded this to the software experts. Their feedback should be posted here but could you give more detailed description about your issue. Also which software release you are using?

BR
Tsvetolin Shulev

0 Paolo Martinetti over 8 years ago in reply to Cvetolin Shulev-XID

Expert 2730 points

I'm using
TMDX5515EZDSP (REV D) evaluation board

Software:
CCS v6
CSL v3.0.6

I'm only need to know the mapping between the DMA controllers / channels and I2S0 on my board, in order to implement an interrupt driven I2S reader using DMA using CSL 3.0.6. What DMA controller is mapped to I2S0 on my board? What DMA channels (0..3) are used for reading / writing?

Thanks you so much

0 Lalindra Jayatilleke over 8 years ago in reply to Paolo Martinetti

TI__Mastermind 30365 points

Paolo,
Please take a look at the I2S UG for C5515 www.ti.com/.../tms320c5515.pdf this will provide more detail on the channel mapping for I2S0 that you need. I2S0 is on DMA0.

As far as examples go, there are I2S examples in the CSL at C:\ti\c55_lp\c55_csl_3.07\ccs_v6.x_examples\i2s

There is also a C5515 specific decimation example that uses I2S0 and the example code can be found in the CSL at C:\ti\c55_lp\c55_csl_3.07\demos\decimation\c5515\c55x-digital-mic-decimation The app note for this example is at www.ti.com/.../sprac51.pdf

IdleLoop.c should be interesting.

Note: This is only available in CSL v3.07 which can be downloaded at software-dl.ti.com/.../index_FDS.html

Hope this helps.

Lali

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