TDA4VM: About mcasp in c6x

Hi Eason,

eason zhou said:

If I refer to createStreams() in pdk_jacinto_09_02_00_30/packages/ti/drv/mcasp/example/src/audioSample_io.c, do I only need to create TX and RX once?

Yes, you should only have to initialize the TX and RX once. You should look at the packages/ti/drv/mcasp/example/j721e/src/audio_evmInit.c for more information on initializing the MCASP.

eason zhou said:

I use all the serializers of the mcasp4 mentioned above to transmit and receive TDM16 data, so how do I configure the distribution of the transmitted or received TDM16 data?

Please read the following documentation: 5.13. McASP — Platform Development Kit (PDK) - JACINTO User Guide

Best,
Jared

Hi Jared

 Let's continue the discussion. I have some more information to confirm.
From the reference documentation you mentioned:

Jared McArthur said:

Please read the following documentation: 5.13. McASP — Platform Development Kit (PDK) - JACINTO User Guide

If I use interleaved：

The above is my understanding of the system memory storage method.

Q1:

If my synchronization clock uses 48khz,

then my bit clock is:  16 (TDM16) * 32 (bit per slot) * 48khz = 24.576Mhz ?

Or:  8 (each serializer has 8 slots, there are 4 serializers in total: two transmit and two receive) * 32 (bit per slot) * 48Khz = 12.288Mhz?

Q2: 

In Mcasp_ChanParams configuration of Tx:

Serializer configuration is:

2, /* number of serialisers */
{Mcasp_SerializerNum_0,Mcasp_SerializerNum_1}, /* serialiser index */
16, /* number of TDM channels */

In Mcasp_ChanParams configuration of Rx:
Serializer configuration is:

2, /* number of serialisers */
{Mcasp_SerializerNum_2,Mcasp_SerializerNum_3}, /* serialiser index */
16, /* number of TDM channels */