Yes, I ​do not lock DMA to front Porch. I change the "lockDMAToFrontPorch(false);" in TouchGFXGeneratedHAL.cpp, the tearing still alive.
And this is the all code of TouchGFXHAL.cpp.
/**
******************************************************************************
* File Name : TouchGFXHAL.cpp
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under Ultimate Liberty license
* SLA0044, the "License"; You may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* www.st.com/SLA0044
*
******************************************************************************
*/
#include <TouchGFXHAL.hpp>
/* USER CODE BEGIN TouchGFXHAL.cpp */
#include "stm32h7xx.h"
#include <touchgfx/hal/OSWrappers.hpp>
#include "main.h"
#include "user_voice.h"
#include "st7789v.h"
#include "user_lcd.h"
#include "user_config.h"
#include <touchgfx/hal/GPIO.hpp>
#include "FreeRTOS.h"
#include "task.h"
/* USER CODE END private defines */
/* USER CODE BEGIN private variables */
volatile bool firstFrameReadyToDisplay = false;
static uint16_t* currFbBase = 0;
/* USER CODE END private variables */
/* USER CODE BEGIN private functions */
/* USER CODE END private functions */
/* USER CODE BEGIN extern C prototypes */
extern "C"
{
bool os_inited = false;
uint32_t display_start,display_tot,display_max = 0;
}
/* USER CODE END extern C prototypes */
using namespace touchgfx;
void TouchGFXHAL::initialize()
{
/* USER CODE BEGIN initialize step 1 */
GPIO::init();
// ST7789V2_Init();
/* USER CODE END initialize step 1 */
// Calling parent implementation of initialize().
//
// To overwrite the generated implementation, omit call to parent function
// and implemented needed functionality here.
// Please note, HAL::initialize() must be called to initialize the framework.
TouchGFXGeneratedHAL::initialize();
/* USER CODE BEGIN initialize step 2 */
lockDMAToFrontPorch(false);
instrumentation.init();
setMCUInstrumentation(&instrumentation);
enableMCULoadCalculation(true);
os_inited = true;
/* USER CODE END initialize step 2 */
}
uint16_t* TouchGFXHAL::getTFTFrameBuffer() const
{
return currFbBase;
}
void TouchGFXHAL::setTFTFrameBuffer(uint16_t* adr)
{
currFbBase = adr;
}
void TouchGFXHAL::configureInterrupts()
{
}
void TouchGFXHAL::enableLCDControllerInterrupt()
{
}
void TouchGFXHAL::disableInterrupts()
{
}
void TouchGFXHAL::enableInterrupts()
{
}
// Full refresh
void TouchGFXHAL::flushFrameBuffer()
{
Rect rect = Rect(0, 0, 320, 170);
HAL::flushFrameBuffer();
ST7789V2_SetDisplayWindow(rect.x, rect.y, rect.width, rect.height);
this->copyFrameBufferBlockToLCD(rect);
}
void TouchGFXHAL::flushFrameBuffer(const Rect& rect)
{
// Partial framebuffer might be supported for this platform only when Double
// Buffering is enabled
display_start = GetSysTs_To_uSec();
// HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_RESET);
this->flushFrameBuffer();
// HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_SET);
display_tot = GetSysTs_To_uSec() - display_start;
if(display_tot > display_max)
{
display_max = display_tot;
}
}
void TouchGFXHAL::copyFrameBufferBlockToLCD(const Rect rect)
{
__IO uint16_t* ptr;
uint32_t tot;
// Use default implementation (CPU copy!).
// This can be accelerated using regular DMA hardware
ptr = getClientFrameBuffer();
tot = (rect.width - rect.x)*(rect.height - rect.y);
#if 0
ST7789V2_WriteMultipleData((uint16_t*)ptr, tot);
#else
ST7789V2_blockCopy((uint16_t *)ptr,tot);
#endif
}
bool TouchGFXHAL::blockCopy(void* RESTRICT dest,
const void* RESTRICT src,
uint32_t numBytes)
{
bool retval = true;
// Use default implementation (CPU copy!).
// This can be accelerated using regular DMA hardware
retval = HAL::blockCopy(dest, src, numBytes);
return retval;
}
/* USER CODE BEGIN virtual overloaded methods */
bool TouchGFXHAL::beginFrame()
{
return HAL::beginFrame();
}
void TouchGFXHAL::endFrame()
{
HAL::endFrame();
if (frameBufferUpdatedThisFrame)
{
if (!firstFrameReadyToDisplay)
{
firstFrameReadyToDisplay = true;
/* Backlight control signal assertion */
BacklightEnable();
// Voice_Set(0x52);
}
}
}
/* USER CODE END virtual overloaded methods */
/* USER CODE BEGIN extern C functions */
// TODO : Remove this and use BSP/Components/st7789H2 API once fixed
extern "C" {
portBASE_TYPE IdleTaskHook(void* p)
{
if ((int)p) //idle task sched out
{
touchgfx::HAL::getInstance()->setMCUActive(true);
}
else //idle task sched in
{
touchgfx::HAL::getInstance()->setMCUActive(false);
}
return pdTRUE;
}
void TouchGFX_TickHandler(uint8_t PinStatus)
{
if (os_inited == true)
{
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();
GPIO::set(GPIO::VSYNC_FREQ);
}
else /* Falling edge : exiting active area */
{
GPIO::clear(GPIO::VSYNC_FREQ);
HAL::getInstance()->frontPorchEntered();
}
}
}
}
/* USER CODE END extern C functions */
/* USER CODE END TouchGFXHAL.cpp */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
Wrong synchronization between your screen and your MCU? Your mean is the TE signal from screen? Or another reason.
