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YSN
YSN
Associate III
November 8, 2020
Question

STM32H745 Cortex M7 UART Transmit and Receive with DMA Problem

  • November 8, 2020
  • 1 reply
  • 1099 views

We have tested UART3 with both Polling and Interrupt and working fine. But now we wanted to receive stream of 25 bytes each line continuously with DMA enable on UART RX.

But We are unable to Receive any data with UART DMA. I dont find any example for UART with DMA in cube package for STM32H745 MCU.

Any one has worked with UART RX DMA in STM32H7 series MCU ?

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1 reply

TDK
TDK
November 8, 2020

> I dont find any example for UART with DMA in cube package for STM32H745 MCU.

Here's one for the H743. The relevant code should be identical for the H745 (disable the CM4 core by setting option byte BOOT_CM4=0).

https://github.com/STMicroelectronics/STM32CubeH7/tree/79196b09acfb720589f58e93ccf956401b18a191/Projects/NUCLEO-H743ZI/Examples/UART/UART_TwoBoards_ComDMA

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