STM32L4Q5VGTxP DMA why it doesn't work.

[YPark.5]

• STM32L4Q5VGTxP I use the board I made.

FUNC 1) HAL_SPI_Transmit(ILI9341_SPI_Handle,&data,1,100);

The output waveform is observed with SCLK / MOSI PIN.

FUNC 2) HAL_SPI_Transmit_DMA(ILI9341_SPI_Handle,&data,1);

Output waveform does not appear with SCLK / MOSI PIN.

After executing HAL_SPI_Transmit_DMA once

(check function)

HAL_SPI_StateTypeDef err;

err = HAL_SPI_GetState(ILI9341_SPI_Handle);

while(err != HAL_SPI_STATE_READY){

err = HAL_SPI_GetState(&hspi1);

}

The result continues to return err (HAL_SPI_STATE_BUSY_TX).

Below is a picture of CUMEMX setup. 

 

//======================== PS

HAL_ADC_Start_DMA(&hadc1,&adc_dma_buffer[0], 4);

Also, it doesn't work.

What did I miss, where did I go wrong?

[TDK · Accepted solution]

Ensure MX_DMA_Init is called before MX_SPI_Init.

[YPark.5]

Wow!

Previously, the project was applied in order in hal, but as TDK said, it was changed.

Really thankful.

It works normally now.