When i use HAL_UART_Transmit and HAL_UART_Receive, and then after it use HAL_UART_Receive_DMA, the dma doesn't work. Is there a reason for this? (stm32g473cct3)

TMich.1 · ‎2023-03-21

Foued_KH · ‎2023-03-21

Hello @TMich.1 ,

Please you can refer to this link, it may helps you : FAQ: STM32 HAL UART driver - API and Callbacks

Foued

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TMich.1 · ‎2023-03-21

thank you, but it does not say anything about combining dma and normal blocking mode.

Foued_KH · ‎2023-03-21

For the DMA mode, the UART half transfer callback or the transfer complete callback is called.

When DMA is used, the MX_DMA_Init shall always be called before any other HAL_***_Init (where *** is any peripheral with a HW dependency on DMA init code).

Make sure that :

GPIO
DMA
SystemClock_Config
the rest

Foued

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TMich.1 · ‎2023-03-21

thank you, everything was allright, it ended up being the boot0 jumper that had a bad connection.