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STMicroelectronics / stm32h7xx-hal-driver

Provides the STM32Cube MCU Component "hal_driver" of the STM32H7 series.
BSD 3-Clause "New" or "Revised" License
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The type of DMA_HandleTypeDef.Instance may be incorrect. #40

Closed pic-man749 closed 11 months ago

pic-man749 commented 1 year ago

Describe the set-up

Describe the bug

Hi.

When I programming USART communication using DMA, I encountered a compile error when attempting to retrieve the write address of the DMA buffer. I found that the type of the DMA_HandleTypeDef.Instance defined in stm32h7xx_hal_dma.h, is set to void*. I suspect that the correct type would be DMA_Channel_TypeDef*.

https://github.com/STMicroelectronics/stm32h7xx_hal_driver/blob/dca6b63d9cce505f2801107f514c491d850a6cbb/Inc/stm32h7xx_hal_dma.h#L138C75-L138C75

Please look into this matter and confirm if my assumption is correct. Thank you.

pic-man749 commented 11 months ago

Dear,

I have come to the realization that the issue I raised regarding a potential bug was, in fact, a result of an error in my own code.

I tried to use huart2.hdmarx->Instance->NDTR to get write address of the DMA buffer, but it was a mistake. I made a mistake because I had used this code in the past to similar calculations on an STM32F4 board. In STM32F7, I was able to calculate this by using the __HAL_DMA_GET_COUNTER() macro.

I appreciate your time and attention to the matter. Please consider this issue resolved, and feel free to close it at your earliest convenience.

Thank you for your dedication to maintaining this library, and I am grateful for the excellent work you and the team do in supporting the community.

TOUNSTM commented 11 months ago

Hello @pic-man749,

Thank you for your contribution. Regarding the point for which you opened the issue, as it has been resolved, please allow me to close the issue. Thank you again for your report. We are looking forward to reading from you again.

With regards,