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STM32H7 MDMA for UART DMA

farukisiker
Associate III

‎2025-09-09 5:34 AM

Hello,

I would like to transfer 3 linked list blocks over UART DMA. When I started HAL_MDMA_START_IT, it transmits only 16 bytes. How can I send big files back to back? Configurations are as follows:

MCU : STM32H7 series

Firmware : Last release

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Saket_Om
ST Employee

‎2025-09-09 7:33 AM - edited ‎2025-09-09 7:36 AM

Hello @farukisiker 

Please refer to the article below to configure your linked list dma transfer.

How to configure the linked list mode in STM32Cube... - STMicroelectronics Community

also see the workshop below:

STM32H5 workshop - 05 More advanced GPDMA - Linked Lists (intermediate)

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Saket_Om
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Saket_Om
ST Employee

‎2025-09-09 7:48 AM

Hello @farukisiker 

Please refer to this example as starting point. 

STM32CubeU5/Projects/NUCLEO-U575ZI-Q/Examples/UART/UART_TwoBoards_ComDMAlinkedlist at main · STMicroelectronics/STM32CubeU5 · GitHub

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
Saket_Om
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