Low power mode of touchGFX

[YKim.10]

Hi,

I'm using touchGFX.

• MCU : STM32H747i
• display : ILI9806E
• touch pannel : GT911

I'm developing multi-task using touchGFX.

1. task1 : uart with another mcu
2. task2 : led on/off
3. task3 : get button state

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I'm trying to reduce power consumption of entire system when the display is turned off.

And, another task must be running.

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The current consumption of my board is about 280mA when display is turned on.

When display is turned off, the current consumption is 200mA. (backlight is turned off)

Now, I have to reduce more power consumption.

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Is there any function or method for reducing power consumption of gui_task?

Or, Can touchGFX be operated with low power? (below 100mA)

​

regards,

Youngjun

[PKunK.1]

Hi!

It's not an answer to your post, but I'm writing after reading your post, thinking if I can find a clue to the problem I have to solve now.

I am connecting the ILI9806E to stm32f469I_Discovery. The interface is MIPI. But no matter how hard I try, the screen doesn't come out, so I've been thinking about it for weeks.

I think you connected TouchGFX to ILI9806E, is that right?

If I am right, can you share me the information about ILI9806E?

Can you provide me your ILI9806E initialization code so that I can compare the way you did it with the way I did?

[YKim.10]

Hi,

I also experience like you for a long time.

I solved that problem to initialize pin state.

The pin state when initializing is very important.

And, you should receive register map of ILI9806E from manufacturer.

I ask the register value to manufacturer.

When i set the register value(received from manufacturer), My display turned on.

[MMenz.1]

Hi,

I do have the same problem here...

I have set up the ili9806 as specified by the manufacturer. Now I can use the display when I use it directly (modified CubeMX ImageToggle example) but without success in combination with TouchGFX. How have you setup the LTDC/DSI/DMA2D peripheral? Mine is based on the example for STM32F679-Disco board. Are you using videoMode as the cubeMx imageToggle Examples do?