TDA4VM: R5 touch panel drivers

Zi Wang

Intellectual 415 points

Part Number: TDA4VM

Hello，

Does the R5 support touch panel drivers?

We have externally connected a screen with touch function, how do we get the touch event？

over 3 years ago

0 Brijesh Jadav over 3 years ago

TI__Guru**** 477395 points

Hi Zi Wang,

SDK does not have any touch screen driver support, but you could add it easily. The basic modules, i2c, spi, uart are all supported. You could use these interfaces to implement touch panel driver.

Regards,

Brijesh

0 Zi Wang over 3 years ago in reply to Brijesh Jadav

Intellectual 415 points

Hello Brijesh,

This picture is my idea,
Is there an existing framework similar to this?
Or, is my idea feasible in TDA4?

SDK:Linux && RTOS 8.0

+1 Brijesh Jadav over 3 years ago in reply to Zi Wang

TI__Guru**** 477395 points

Hi Zi Wang,

From SDK point of view, you would require remote service framework to send message from mcu2_0 to A72. The rest is all in the application framework on a72, isnt' it? I think then this is possible.

Regards,

Brijesh

0 Zi Wang over 3 years ago in reply to Brijesh Jadav

Intellectual 415 points

Hello Brijesh,

thank you for your reply.

0 Zi Wang over 3 years ago in reply to Zi Wang

Intellectual 415 points

Hello Brijesh,

If this option is feasible, the following steps are required:
1. Porting QT framework on Linux of A72
2. Pass the touch event of MCU2_0 to A72 through remote services and bind it with the QT framework
3. Synchronize the content of the QT display interface to MCU2_0 to display

Regarding the third point, is the synchronization of the interface display achieved through tiovx, and how to connect tiovx with QT?

Is there a ready-made solution for the human-computer interaction of the TDA4 platform?

0 Brijesh Jadav over 3 years ago in reply to Zi Wang

TI__Guru**** 477395 points

Hi Zi Wang,

Zi Wang said:
3. Synchronize the content of the QT display interface to MCU2_0 to display

Did not get it. Do you mean to display content of the QT display using OpenVX display node, running on mcu2_0? I am not sure if QT can give output rendered buffer, but it can, then it can be displayed using OpenVX node.

Regards,

Brijesh

0 Zi Wang over 3 years ago in reply to Brijesh Jadav

Intellectual 415 points

Hello Brijesh,

Is there a ready-made solution for the human-computer interaction of the TDA4 platform?

0 Brijesh Jadav over 3 years ago in reply to Zi Wang

TI__Guru**** 477395 points

Hi Zi Wang,

Please find attached updated multi-camera example, which demonstrates how to use two display pipelines and position them side by side to create super frame.

/cfs-file/__key/communityserver-discussions-components-files/791/Display_5F00_Position-_2800_2_2900_.zip

I have removed LDC and mosaic nodes from this example and use two cameras to output on two display pipelines. These two display pipelines are currently downscaling input image to 960x1080 resolution and displays them side by side. I have tested it on EVM with IMX390 camera.

Regards,

Brijesh

0 Zi Wang over 3 years ago in reply to Brijesh Jadav

Intellectual 415 points

Hello Brijesh,

Sorry for my late reply. Thank you for your suggestion.

I got your reply, but this is an example of composite superframe. Based on the above scheme, I want to know how to synchronize the rendered buffer of QT to MCU 2_ 0? Because our display screen is connected to r5f through DSI. I hope to get your advice.

0 Brijesh Jadav over 3 years ago in reply to Zi Wang

TI__Guru**** 477395 points

Hi Zi Wang,

Did not get your question. Do you have a way to get the output rendered buffer from QT? If not, we cannot directly send QT buffer to mcu2_0..

The patches are for your another question, where you want to send frames to two DSI displays.. We can merge the frames using overlay manager and then can send merged frame to the display, serializer, which can split the frames and can send output to two displays..

Regards,

Brijesh

0 Zi Wang over 3 years ago in reply to Brijesh Jadav

Intellectual 415 points

Hi Brijesh,

Thank you for your reply.

Sorry, I didn't express it clearly enough.

We want to implement an APP with HMI. Click the button on the screen to get a response. This APP is intended to run on A72 Linux, but our display and touch panel are connected to r5f through DSI, so touch events are obtained through MCU2_0, and finally passed to Linux APP, The rendering buffer is finally passed to MCU2_0 to display through DSI.

Based on this requirement, we consider integrating QT on A72 Linux to develop the APP, because the tda4vm SDK says that the platform supports QT, but it is not clear how to implement it, especially how to pass render buffer to MCU2_0 in this case.

In order to meet the above needs, how should we implement it, or is there any other feasible scheme? I hope to get your support step by step.

Regards,

Zi Wang

0 Brijesh Jadav over 3 years ago in reply to Zi Wang

TI__Guru**** 477395 points

Hi Zi Wang,

Sorry for the late reply. I really doubt there is any existing solution.. But let me check internally and get back to you.

Regards,

Brijesh

0 Brijesh Jadav over 3 years ago in reply to Brijesh Jadav

TI__Guru**** 477395 points

Hi Zi Wang,

Sorry for the late reply. There is no existing solution for this..

Regards,

Brijesh

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TDA4VM: R5 touch panel drivers