My config:I am use FSMC for communication over intel 8080 without DMA with SSD1963 LCD driver;My custom display 100x100 pixels;I am not use touch;I am use internal framebufferI am configure my project with as: https://support.touchgfx.com/docs/development/touchgfx-hal-development/scenarios/scenarios-fmc/generate simple design in TouchGFX Designer (box 100x100 pixels with RED color)create one frame buffer 100x100 pixels 16bppadd code for handling tearing and synchronization with RTOSTouchGFXHAL::flushFrameBuffer(const touchgfx::Rect& rect) never call... (I am use TouchGFX gen. 4.14 and 4.13 designer)Can you describe steps for run my simple design?My GUI Task in freertos:void TouchGFXHAL::taskEntry() { enableLCDControllerInterrupt(); enableInterrupts(); os_inited = true; OSWrappers::waitForVSync(); backPorchExited(); for (;;) { OSWrappers::waitForVSync(); backPorchExited(); } }and virtual void backPorchExited() { swapFrameBuffers(); tick(); }

EHay.1

Associate II

Question

How to configurate my custom project with TouchGFX engine and design for STM32F4 (I am use RTOS) with LCD controller SSD1963 over 8080 interface (i am not use DMA)?

Forum|Forum|5 years ago
August 26, 2020
3 replies
1747 views

My config:

I am use FSMC for communication over intel 8080 without DMA with SSD1963 LCD driver;
My custom display 100x100 pixels;
I am not use touch;
I am use internal framebuffer
I am configure my project with as: https://support.touchgfx.com/docs/development/touchgfx-hal-development/scenarios/scenarios-fmc/
generate simple design in TouchGFX Designer (box 100x100 pixels with RED color)
create one frame buffer 100x100 pixels 16bpp
add code for handling tearing and synchronization with RTOS

TouchGFXHAL::flushFrameBuffer(const touchgfx::Rect& rect) never call... (I am use TouchGFX gen. 4.14 and 4.13 designer)

Can you describe steps for run my simple design?

My GUI Task in freertos:

void TouchGFXHAL::taskEntry()
{
 enableLCDControllerInterrupt();
 enableInterrupts();
 os_inited = true;
 OSWrappers::waitForVSync();
 backPorchExited();
 
 for (;;)
 {
 OSWrappers::waitForVSync();
 backPorchExited();
 }
}

and

 virtual void backPorchExited()
 {
 swapFrameBuffers();
 tick();
 }

This topic has been closed for replies.

Alexandre RENOUX

Visitor II

Hello,

Is FlushFramebuffer called at least once ?

If nothing is written in the Framebuffer, the flushFramebuffer will not be called. Are you sure you draw something in your framebuffer ?

Please have a look at the L496G-DISCO board Application Template available in TouchGFX Designer, this implements the FMC display interface.

/Alexandre

EHay.1Author

Associate II

No, flush framebuffer never call. I think need add call manually flush framebuffer in:

 virtual void backPorchExited()
 {
 //swapFrameBuffers();
 TouchGFXHAL::flushFrameBuffer(const touchgfx::Rect& rect);
 tick();
 }

void TouchGFX_TearingHandler(uint8_t PinStatus)
{
 if (os_inited)
 {
 if (PinStatus) /* Raising edge : entering Active Area */
 {
 HAL::getInstance()->vSync();
 OSWrappers::signalVSync();
 // Swap frame buffers immediately instead of waiting for the task to be scheduled in.
 // Note: task will also swap when it wakes up, but that operation is guarded and will not have
 // any effect if already swapped.
 //HAL::getInstance()->swapFrameBuffers();
 }
 else /* Falling edge : exiting active area */
 {
 HAL::getInstance()->frontPorchEntered();
 }
 }
}

This issue recommended use endFrame() for call flush. But I not understand where insert endFrame()...

https://community.st.com/s/question/0D50X0000BmnXT3/howto-trigger-flushframebufferrect

Example for redefine virtual function flush:

https://community.st.com/s/question/0D53W000004KWCjSAO/how-to-configura-touchgfx-for-stm32f407zgt6-with-cubemx

and

https://community.st.com/s/question/0D50X0000ADDsIiSQL/stm32f4touchgfxlcd-with-8080-parallel-interface