TDA4VM: J7 TDA4VM EVM - Single Camera VPAC Application

Aharon Shpigel

Prodigy 140 points

Part Number: TDA4VM

Hello,

I want to use the Single Camera Application on the J7 TDA4VM EVM.

I will use OnSemi AR0820 sensor as CSI input.

I want to do few changes of the application:

I want that the VISS will output the video data as RGB888 instead of YUV420
I want the output through DSS will be to DSI instead of eDP/HDMI

I need that the DSI will work at non-burst with sync pulses, and I need to disable the DCS command because I will connect the DSI stream to DSI analyzer and not to a display

What I need to do in order to implement the changes I want?

Thanks

Aharon Shpigel

over 4 years ago

0 Brijesh Jadav over 4 years ago

TI__Guru**** 452265 points

Hi Aharon Shpigel,

RGB output from VISS is not recommended to be used, so could you please help us understand why you require RGB output format?

DSI output can be enabled in vision apps by enabling ENABLE_DSS_DSI macro in ti-processor-sdk-rtos-j721e-evm-07_01_00_11\vision_apps\apps\basic_demos\app_tirtos\common\app_cfg_mcu2_0.h file.

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Hi Brijesh,

Thanks for your response.

I want the RGB output format because my final goal is to take the DSI stream and convert it to CSI stream by converting data types between DSI types to CSI types. The ECU that will receive the CSI support RGB888.

What about my question regarding the DSI configuration:

"I need that the DSI will work at non-burst with sync pulses, and I need to disable the DCS command because I will connect the DSI stream to DSI analyzer and not to a display"

How can I do that?

Thanks

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Hi Aharon,

But please for DSI input, you would external DSI receiver. Otherwise how do you convert DSI to CSI stream??

Yes, the default output from DSI has DSC commands disabled. Not sure what you mean non-burst with sync pulses. DSI output is for video streams, so it will included sync pulses.

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Hi Brijesh,

Yes I have DSI receiver that is implemented by FPGA.

DSI have three mode of operation:

Non burst with sync pulses
Non burst with sync events
Burst with sync events

I need that the DSI output will work an the first mode. Can I control it at the J7 TDA4VM?

Thanks

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Hi Aharon,

I think it supports, i see flag burstMode in DSI driver. I think by default it is working on non-burst mode.

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Hi Brijesh,

There are two option at non-burst mode 1. sync pulses 2. sync events. I need the sync pulses

What about the RGB888? You wrote that it is not recommended as output of VISS but is it possible? Why it is not recommended?

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Hi Aharon,

RGB888 is more of Debug output, so not recommended to be used. Also it is not supported by many other modules..

I need to check pulse vs events. but can you give it a try?

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Hi Brijesh,

Can you tell me what is the output format of the DSS in the Single Camera VPAC Application? How can I see what is the format? How can I control/change it?

Thanks

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Hi Aharon,

it is not related to single camera example. It is common for all examples.

There are three display outputs supported in vision apps

- HDMI output. In this case DSS outputs in RGB24 bit DPI format and then external module is used to convert it into HDMI format

- eDP output: in this case, DSS and eDP outputs in RGB format

- DSI output: I believe, even in this case DSS and DSI are configured to output in RGB format.

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Thanks,

Another question dose TI has (or can point to) a board that can connect to the J7X COMMON PROCESSOR BOARD DSI FPC connector?

The best will be a board with headers or SMA connectors but any board will be ok

Thanks

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Aharon,

I will get back to you on this question, as i am not currently sure about supported board on this connector.

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Hello Brijesh,

I want to connect the DSI output to 1280*800 DSI display.

Where should I change the DSI resolution to 1280*800, in which files?

Thanks

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Hello Aharon,

The default resolution supported for DSI in vision apps is 1280x800 resolution. You just need to enable DSI output in vision apps by enabling macro ENABLE_DSS_DSI in file ti-processor-sdk-rtos-j721e-evm-07_01_00_11\vision_apps\apps\basic_demos\app_tirtos\common\app_cfg_mcu2_0.h.

Please note that the default output is on EVM, which goes via ub941 serializer, so this example configures SERDES in the ti-processor-sdk-rtos-j721e-evm-07_01_00_11\vision_apps\utils\dss\src\app_dss_j721e.c file. You may require to change, as per your board requirement.

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Hello Brijesh,

I am working with ti-processor-sdk-rtos-j721e-evm-06-02-00-21. Does the default resolution in this version is the same?

I saw an answer you wrote: https://e2e.ti.com/support/processors/f/791/t/912650?tisearch=e2e-quicksearch&keymatch=dsi

In this answer you are saying that the default resolution is 1080p

Thanks

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Hello Aharon,

That's output resolution in demo.

DSI supports only 1280x800 resolution, so we need to change demo to output in 1280x800 resolution.

Regards,

Brijesh

0 Brijesh Jadav over 4 years ago in reply to Brijesh Jadav

TI__Guru**** 452265 points

You could follow below FAQ to change output resolution in demo.

[FAQ] PROCESSOR-SDK-DRA8X-TDA4X: How to change display resolution in vision apps? - Processors forum...

e2e.ti.com

Part Number: PROCESSOR-SDK-DRA8X-TDA4X Vision apps demos uses 1920x1080 display resolution. This article explains how to change resolution and demo to use new resolutions

Regards,

Brijesh

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Thanks,

Now I noticed you sent me this link

0 Aharon Shpigel over 4 years ago in reply to Brijesh Jadav

Prodigy 140 points

Thanks,

I changed the resolution and now I can see the image from the sensor on the SDI display.

Now I'm trying to output the DSI without FPD-LINKIII module, directly to J53 (DSI-FPC Connector) to use native DSI interface while using the same driver.

I believe that I will need to disable the FPD-LINKIII configuration, can you please point me to how and where I need to disable the FPD-LINKIII configuration

Thanks

Aharon

0 Brijesh Jadav over 4 years ago in reply to Aharon Shpigel

TI__Guru**** 452265 points

Aharon,

We have not really tested DSI output without FPD link.

You could comment out API appDssConfigureUB941AndUB925 in the file ti-processor-sdk-rtos-j721e-evm-07_01_00_11\vision_apps\utils\dss\src\app_dss_j721e.c to disable FPD Link configuration.

Regards,

Brijesh