How to use TouchGFX on SPI TFT Sreen?

[Jack li1]

Hi:

I have an spi TFT screen,and how to port the TouchGFX on this Sreen?

Thanks!!

[Martin KJELDSEN]

https://touchgfx.zendesk.com/hc/en-us/articles/203642951-MCUs-without-TFT-controller

You'll find that, when you don't have an LTDC to clock out pixels for you, you'll implement a transfer of the framebuffer (or parts of it) to your SPI display in a particular method called after a frame has been rendered.

void HAL::flushFrameBuffer();
void HAL::flushFrameBuffer(Rect& r);

/Martin

[Martin KJELDSEN]

So the port will consist of you creating your own HAL that overrides flushFrameBuffer. E.g.

void MyHAL::flushFrameBuffer(Rect& r)
{
 HAL::flushFrameBuffer(r);
 
 //Use own drivers to transfer data
 ...
 
 //If using DMA to transfer data you'll need an additional semaphore released by your DMA 
 // TX completed handler. This overrided flush method should try to take that semaphore so it doesn't return 
 // before DMA transfer has been completed. 
 
}

Give the article a read and let me know.

[Jack li1]

Hi Martin:

Thank you so much.l am tring to use it in my program.

Best regards!

Jack li

[Jack li1]

Hi Martin:

Thank you so much.l am tring to use it in my program.

Best regards!

Jack li

[Jack li1]

Hi Martin:

Thanks your help! It can display on TFT by touchgfx.

Best regards!

Jack li

[Martin KJELDSEN]

That's great, @Jack li​!

/Martin

[KR51K]

Hello, would you share your solution?

Best regards!