Howto migrate example G071 partial buffering TouchGFX to for example F446, when MB1642BDisplayDriver use non HAL based parts ...

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  // Disable spi peripherals
  __HAL_SPI_DISABLE(&hspi1);
  __HAL_DMA_DISABLE(&hdma_spi1_tx);
 
  CLEAR_BIT(hspi1.Instance->CR2, SPI_CR2_LDMATX);
 
  /* Clear all flags */
  __HAL_DMA_CLEAR_FLAG(&hdma_spi1_tx, (DMA_FLAG_GI1 << (hdma_spi1_tx.ChannelIndex & 0x1cU)));
 
  /* Configure DMA Channel data length */
  hdma_spi1_tx.Instance->CNDTR = sizex*sizey;
  /* Configure DMA Channel destination address */
  hdma_spi1_tx.Instance->CPAR = (uint32_t)&hspi1.Instance->DR;
 
  /* Configure DMA Channel source address */
  hdma_spi1_tx.Instance->CMAR = (uint32_t)bitmap;
 
  /* Disable the transfer half complete interrupt */
  __HAL_DMA_DISABLE_IT(&hdma_spi1_tx, DMA_IT_HT);
  /* Enable the transfer complete interrupt */
  __HAL_DMA_ENABLE_IT(&hdma_spi1_tx, (DMA_IT_TC | DMA_IT_TE));
 
  /* Enable the Peripherals */
  __HAL_DMA_ENABLE(&hdma_spi1_tx);
  __HAL_SPI_ENABLE(&hspi1);
 
  /* Enable Tx DMA Request */
  SET_BIT(hspi1.Instance->CR2, SPI_CR2_TXDMAEN);

Here part from void Display_Bitmap(

produce errors...

../Core/Src/UNIMM_DisplayDriver.c: In function 'Display_Bitmap':
../Core/Src/UNIMM_DisplayDriver.c:139:34: error: 'SPI_CR2_LDMATX' undeclared (first use in this function); did you mean 'SPI_CR2_TXDMAEN'?
  139 |   CLEAR_BIT(hspi1.Instance->CR2, SPI_CR2_LDMATX);
      |                                  ^~~~~~~~~~~~~~
../Drivers/CMSIS/Device/ST/STM32F4xx/Include/stm32f4xx.h:214:43: note: in definition of macro 'CLEAR_BIT'
  214 | #define CLEAR_BIT(REG, BIT)   ((REG) &= ~(BIT))
      |                                           ^~~
../Core/Src/UNIMM_DisplayDriver.c:139:34: note: each undeclared identifier is reported only once for each function it appears in
  139 |   CLEAR_BIT(hspi1.Instance->CR2, SPI_CR2_LDMATX);
      |                                  ^~~~~~~~~~~~~~
../Drivers/CMSIS/Device/ST/STM32F4xx/Include/stm32f4xx.h:214:43: note: in definition of macro 'CLEAR_BIT'
  214 | #define CLEAR_BIT(REG, BIT)   ((REG) &= ~(BIT))
      |                                           ^~~
In file included from ../Core/Inc/stm32f4xx_hal_conf.h:286,
                 from ../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal.h:30,
                 from ../Core/Inc/main.h:31,
                 from ../Core/Src/UNIMM_DisplayDriver.c:1:
../Core/Src/UNIMM_DisplayDriver.c:142:40: error: 'DMA_FLAG_GI1' undeclared (first use in this function); did you mean 'DMA_FLAG_FEIF1_5'?
  142 |   __HAL_DMA_CLEAR_FLAG(&hdma_spi1_tx, (DMA_FLAG_GI1 << (hdma_spi1_tx.ChannelIndex & 0x1cU)));
      |                                        ^~~~~~~~~~~~
../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_dma.h:561:81: note: in definition of macro '__HAL_DMA_CLEAR_FLAG'
  561 | (((uint32_t)((__HANDLE__)->Instance) > (uint32_t)DMA2_Stream3)? (DMA2->HIFCR = (__FLAG__)) :\
      |                                                                                 ^~~~~~~~
../Core/Src/UNIMM_DisplayDriver.c:142:69: error: 'DMA_HandleTypeDef' {aka 'struct __DMA_HandleTypeDef'} has no member named 'ChannelIndex'
  142 |   __HAL_DMA_CLEAR_FLAG(&hdma_spi1_tx, (DMA_FLAG_GI1 << (hdma_spi1_tx.ChannelIndex & 0x1cU)));
      |                                                                     ^
../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_dma.h:561:81: note: in definition of macro '__HAL_DMA_CLEAR_FLAG'
  561 | (((uint32_t)((__HANDLE__)->Instance) > (uint32_t)DMA2_Stream3)? (DMA2->HIFCR = (__FLAG__)) :\
      |                                                                                 ^~~~~~~~
../Core/Src/UNIMM_DisplayDriver.c:142:69: error: 'DMA_HandleTypeDef' {aka 'struct __DMA_HandleTypeDef'} has no member named 'ChannelIndex'
  142 |   __HAL_DMA_CLEAR_FLAG(&hdma_spi1_tx, (DMA_FLAG_GI1 << (hdma_spi1_tx.ChannelIndex & 0x1cU)));
      |                                                                     ^
../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_dma.h:562:81: note: in definition of macro '__HAL_DMA_CLEAR_FLAG'
  562 |  ((uint32_t)((__HANDLE__)->Instance) > (uint32_t)DMA1_Stream7)? (DMA2->LIFCR = (__FLAG__)) :\
      |                                                                                 ^~~~~~~~
../Core/Src/UNIMM_DisplayDriver.c:142:69: error: 'DMA_HandleTypeDef' {aka 'struct __DMA_HandleTypeDef'} has no member named 'ChannelIndex'
  142 |   __HAL_DMA_CLEAR_FLAG(&hdma_spi1_tx, (DMA_FLAG_GI1 << (hdma_spi1_tx.ChannelIndex & 0x1cU)));
      |                                                                     ^
../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_dma.h:563:81: note: in definition of macro '__HAL_DMA_CLEAR_FLAG'
  563 |  ((uint32_t)((__HANDLE__)->Instance) > (uint32_t)DMA1_Stream3)? (DMA1->HIFCR = (__FLAG__)) : (DMA1->LIFCR = (__FLAG__)))
      |                                                                                 ^~~~~~~~
../Core/Src/UNIMM_DisplayDriver.c:142:69: error: 'DMA_HandleTypeDef' {aka 'struct __DMA_HandleTypeDef'} has no member named 'ChannelIndex'
  142 |   __HAL_DMA_CLEAR_FLAG(&hdma_spi1_tx, (DMA_FLAG_GI1 << (hdma_spi1_tx.ChannelIndex & 0x1cU)));
      |                                                                     ^
../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_dma.h:563:110: note: in definition of macro '__HAL_DMA_CLEAR_FLAG'
  563 |  ((uint32_t)((__HANDLE__)->Instance) > (uint32_t)DMA1_Stream3)? (DMA1->HIFCR = (__FLAG__)) : (DMA1->LIFCR = (__FLAG__)))
      |                                                                                                              ^~~~~~~~
../Core/Src/UNIMM_DisplayDriver.c:145:26: error: 'DMA_Stream_TypeDef' {aka 'struct <anonymous>'} has no member named 'CNDTR'; did you mean 'NDTR'?
  145 |   hdma_spi1_tx.Instance->CNDTR = sizex*sizey;
      |                          ^~~~~
      |                          NDTR
../Core/Src/UNIMM_DisplayDriver.c:147:26: error: 'DMA_Stream_TypeDef' {aka 'struct <anonymous>'} has no member named 'CPAR'; did you mean 'PAR'?
  147 |   hdma_spi1_tx.Instance->CPAR = (uint32_t)&hspi1.Instance->DR;
      |                          ^~~~
      |                          PAR
../Core/Src/UNIMM_DisplayDriver.c:150:26: error: 'DMA_Stream_TypeDef' {aka 'struct <anonymous>'} has no member named 'CMAR'; did you mean 'CR'?
  150 |   hdma_spi1_tx.Instance->CMAR = (uint32_t)bitmap;
      |                          ^~~~
      |                          CR

??? SPI_CR2_LDMATX is in F446 ???

howto replace this code with normal _DMA call?

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I extend my question . Exist an explain diagram for this G071 example? Code is little chaos and handle partial buffering isnt clean. How work TE interrupt and timer 6 ?

Why some lines in code is commented ? And we can continue ...

[MM..1]

I replace this chaos

volatile uint8_t IsTransmittingBlock_;
void UNIMM_dmacallback(void)
{
	IsTransmittingBlock_ = 0;
	DisplayDriver_TransferCompleteCallback();
}
 
void Display_Bitmap(const uint16_t *bitmap, uint16_t posx, uint16_t posy, uint16_t sizex, uint16_t sizey)
{
  IsTransmittingBlock_ = 1;
  GC9A01A_SetWindow(posx, posy, posx+sizex-1, posy+sizey-1);
  HAL_GPIO_WritePin(LCD_DC_GPIO_Port, LCD_DC_Pin, GPIO_PIN_SET);
  SPI_send_dma(GC9A01A_SPI_periph, 1, (uint8_t *)bitmap, sizex*sizey, UNIMM_dmacallback);
}