AM5728: Register configuration about Sampling rate conversion

matusan said:

1: Could you tell us how to realize "decode *.wav file on A15 and send the raw data to DSP"?

I don't believe a wav file is compressed, so you should just be able to put it in memory and share it with the DSP. All DSP communications are done using IPC.

Please see our IPC documentation here:

http://software-dl.ti.com/processor-sdk-linux/esd/docs/05_01_00_11/linux/Foundational_Components_IPC.html

matusan said:

2: Could you tell us how to realize "send the McASP data to DSP"?

This would also be through IPC, but I would investigate having the DSP control the McASP so that the data is directly received by the DSP.

matusan said:

3: Could you tell us how to realize "mix the decoded data from A15 & McASP captured data" on the DSP(C66x)"?

This is a high level audio/DSP question and beyond the scope of our support. There are many ways to do this and you should research to find the best for your needs.

matusan said:

4: Are there any related document or sample code?

The IPC documentation above will point to examples. You should be able to find C examples of audio mixing in a variety of resources.

I hope this is helpful to you.

Matusan,

If you refer to the IPC on AM57xx article, you will notice that we have provided couple of examples that show how UART And GPIO driver example code can be merged with IPC code on the and deployed on the slave cores like DSP and IPU. We don`t intend to extend these examples to cover MCASP usecase, so can you try to follow the steps that we have shared on the article with the MCASP use case and let us know if you run into any issues.

In addition to the peripheral configuration and the clock configuration, you may also need to use DSP DMA resources to prevent any conflict with the ARM Android or Linux.

Regards,
Rahul