Apparent error on the HAL SPI library when using DMA.

[EngScn]

Even after setting up a DMA stream to a SPI_RX DMA request, the HAL_SPI_Receive_DMA() function return error code 1 when called. I've solved this problem by also setting up a DMA stream to the SPI_TX request, even though I won't use it. 

Problem occurred when using SPI1 on Full-Duplex Master mode in the STM32F412 uC, STM32CubeIDE Version: 1.16.1

[Andrew Neil]

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@EngScn wrote:

Problem occurred when using SPI1 on Full-Duplex Master mode 

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Surely, in a Full-Duplex master, you would have to have a TX running - so the behaviour is as expected?

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@EngScn wrote:

function return error code 1

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What does that code indicate?

[EngScn]

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Surely, in a Full-Duplex master, you would have to have a TX running - so the behaviour is as expected?

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I would like to have only my RX using DMA. My TX would be transmitting data in polling mode. I believe this should justify using a DMA stream only to the RX channel?

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What does that code indicate?

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HAL_SPI_Receive_DMA() returns a HAL_StatusTypeDef, for code 1 that would be HAL_ERROR.

[Imen.D · Accepted solution]

Hello @EngScn ,

In Full-Duplex mode, both the TX and RX DMA streams need to be configured. 

Ensure that the SPI is disabled before calling the HAL_SPI_Receive_DMA () function to avoid overrun errors.