TDA4VEN-Q1: How to use the C7x's DMA in Entry sdk 10.0，update a patch in sdk 10.0

xie jc

Part Number: TDA4VEN-Q1
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hi TI experts,

We are currently evaluating C7X core on TDA4VEN chip based on this SDK version.
It is planned to port the functionality of the UDMA of the TDA4's C6X core to ENTRY's C7X core. The UDMA function is used to copy image, which is in order to save C7 CPU resource.

But at present debugging down, from the SDK c7x demo code found that SOC_J722S chip C7X does not seem to support DMA.

Source location: vision_apps\apps\basic_demos\app_c7x_kernel\c7x\app_c7x_target_kernel_img_add.cpp
The source code is shown in the following figure:

#if defined(x86_64) || defined(SOC_AM62A) || defined(SOC_J722S)
#undef USE_HW_DMA
#else
#define USE_HW_DMA
#endif

1. And then，Joe give a new dma demo and patch in entry SDK9.2 ，such as：

dma_demo.rar

2. But now, I can't use this patch in sdk 10.0. Could you update a new dma demo and patch in SDK 10.0？

Thanks.

2 months ago

0 Asha Bhandarkar 2 months ago

TI__Genius 10170 points

Hi,

Thank you for posting your question. Your question has been assigned to the appropriate engineer, however please expect a response next week due to TI holidays this week.

Best,

Asha

0 Brijesh Jadav 2 months ago in reply to Asha Bhandarkar

TI__Guru**** 436255 points

Hi,

There isn't UDMA available on the TDA4AEN device. There is a BCDMA, but it isn't still available in the SDK level, so we can't enable this macro to support DMA on C7x.

Regards,

Brijesh

0 xie jc 2 months ago

Expert 1770 points

Hi，

So there is a demo in the SDK 9.2 to use dru. Could you give a new demo to use dru in the sdk 10.0?

The SDK9,2 demo has posted here，liked the dma_demo.rar in this issue.

Thanks

0 Brijesh Jadav 2 months ago in reply to xie jc

TI__Guru**** 436255 points

Hi JC,

No, there isn't demo available to use DRU on in the SDK yet.

Regards,

Brijesh

0 xie jc 1 month ago in reply to Brijesh Jadav

Expert 1770 points

Hi,

I have 2 questions about the DRU and DMA.

1. How many free DRU channels are available, which can be used for us.

2. In the SDK10.0, there is no demo for the dma in the C7x. In the future, which SDK can support the demo of DMA in the C7x？

Thanks

0 Brijesh Jadav 11 days ago in reply to xie jc

TI__Guru**** 436255 points

Hi jc,

For the number of Free DRU channels, i would request you to refer to sysconfig tool. This will tell us resources allocated to each core.

We are still working on enabling this feature in the SDK.

Regards,

Brijesh

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Processors forum

TDA4VEN-Q1: How to use the C7x's DMA in Entry sdk 10.0，update a patch in sdk 10.0