Change the pixel (0,0)

[Juan Delgado]

Hello,

I developed an application in touchgfx and it is working perfectly.

It is 480x800 resolution and the display is oriented in landscape mode.

When I installed the display in the device I realize that the base only fits in one way and therefore the screen is displayed backwards.

The base of the device where I am going to install the display cannot be changed, so I need help to know how to put the pixel (0,0) in the opposite corner to the one that is now and thus be able to view the app correctly.

***************************************************
*=================================================*
*=================================================*
*=================================================*
*=================================================*
*=================================================*
*===============================pixel(0,0) actual *
***************************************************
 
 **************************************************
* pixel(0,0) desired==============================* 
*=================================================*
*=================================================*
*=================================================*
*=================================================*
*=================================================*
***************************************************
 

Thank you,

[Martin KJELDSEN]

Which MCU is this? Maybe it's psosible for you to configure the display to do this - It's not something TouchGFX can help you do effeciently. It's possible to create a widget that sits on top of everything and swaps the pixels but this is very ineffecient.

/Martin

[Juan Delgado]

It is a STM32F746G MCU and the display is DET043WVNMCMIS-4A using the ILI9806E TFT driver IC

[Martin KJELDSEN]

What do you think about the other parts of my answer? Can you configure the display? Would you be satisfied with an inefficient solution? etc.

[Juan Delgado]

I am reading the display commands and I think that it can be set by it.

I would like an inefficient solution while prototyping and read the display driver documentation next.

How can I create the widget sits on top of everything?

[Juan Delgado · Accepted solution]

The display orientation problem was solved by implementing the page 0 command set of the ILI9806E IC driver.

Specifically the command is:

Display Access Control (36h)

This solution is efficient and does not require processing overhead in the MCU.

I hope this help you community!

Bests