SPI DMA Correct Implementation

Hi, I am trying to use DMA in my project for SPI and noticed there are 2 type definitions as below:-

SPI_HandleTypeDef hspi1;
DMA_HandleTypeDef hdma_spi1_tx;

Which one do I need to use for SPI transmission as I am having problems using 'hspi1' as below:-

HAL_SPI_Transmit_DMA(&hspi1, "Test",sizeof"Test");

HAL_SPI_Transmit_DMA(&hdma_spi1_tx, "Test",sizeof"Test");

I just wasn't sure which handle was the correct to use...

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AScha.3Best answer

Super User

afaik you need it to do this way:

HAL_DMA_Init(&hdma_spi1_tx);
HAL_SPI_Transmit_DMA(&hspi1, "Test",sizeof"Test");

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ST Technical Moderator

Hello @Linkpad

I suggest you to take a look at the following example to understand how the spi dma configuration works exactly.

Best Regards.

STTwo-32

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AScha.3Best answer

Super User

afaik you need it to do this way:

HAL_DMA_Init(&hdma_spi1_tx);
HAL_SPI_Transmit_DMA(&hspi1, "Test",sizeof"Test");

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Associate II

Hi,

Thanks for the explanation I now understand!

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