Channel 8 (and over) of DMA stream lead to code generation error on UART

[nSTAC.1]

Hello,

I use:

CubeIDE 1.3.0

STM32Cube_FW_F4_1.25.0

STM32F413CHU

I want to use DMA on UART5 on this uC but generated code does not compile.

Channel used by this UART is DMA1->Stream7->Channel8

I use LL, not HAL for UART.

Into MX_UART5_Init function (Core/Src/usart.c), called in main, there is this following line:

LL_DMA_SetChannelSelection(DMA1, LL_DMA_STREAM_7, DMA_CHANNEL_8);

Unfortunately,DMA_CHANNEL_8 is not defined.

Actually, DMA_CHANNEL_x are not defined. However LL_DMA_CHANNEL_1 to LL_DMA_CHANNEL_7 are defined.

I added LL_DMA_CHANNEL_8 (into Drivers/STM32F4xx_HAL_Driver/STM32F4xx_ll_dma.h):

#define LL_DMA_CHANNEL_8 DMA_SxCR_CHSEL_3

I replaced DMA_CHANNEL_8 to LL_DMA_CHANNEL_8 and my code is compiling.

My code generation produces an error.

Is it a bug?

Thanks for your help.

[TDK]

Appears to be a bug/omission. They are defined within stm32f4xx_hal_dma.h but not within stm32f4xx_ll_dma.h.

#if defined (DMA_SxCR_CHSEL_3)
#define DMA_CHANNEL_8                 0x10000000U    /*!< DMA Channel 8 */
#define DMA_CHANNEL_9                 0x12000000U    /*!< DMA Channel 9 */
#define DMA_CHANNEL_10                0x14000000U    /*!< DMA Channel 10 */
#define DMA_CHANNEL_11                0x16000000U    /*!< DMA Channel 11 */
#define DMA_CHANNEL_12                0x18000000U    /*!< DMA Channel 12 */
#define DMA_CHANNEL_13                0x1A000000U    /*!< DMA Channel 13 */
#define DMA_CHANNEL_14                0x1C000000U    /*!< DMA Channel 14 */
#define DMA_CHANNEL_15                0x1E000000U    /*!< DMA Channel 15 */
#endif /* DMA_SxCR_CHSEL_3 */

[waclawek.jan]

> I added LL_DMA_CHANNEL_8 (into Drivers/STM32F4xx_HAL_Driver/STM32F4xx_ll_dma.h):

> #define LL_DMA_CHANNEL_8 DMA_SxCR_CHSEL_3

#define DMA_SxCR_CHSEL_3        0x10000000U

#define DMA_CHANNEL_8 0x10000000U /*!< DMA Channel 8 */

To me, these look identical.

> My code generation produces an error.

What does this exactly mean?

Do you need to *generate* the code? Can't you simply compile and run it?

JW

[nSTAC.1]

Thanks for your response.

I agree with you but in my project, CubeIDE produces:

#define DMA_SxCR_CHSEL_3        0x10000000U

(into stm32f413xx.h), but not:

#define DMA_CHANNEL_8 0x10000000U

DMA_CHANNEL_8 is not defined at all

That's why I have defined LL_DMA_CHANNEL_8 myself.

Therefore, I can't compile and run the code after CubeIDE code generation (using CubeMX).

[nSTAC.1]

Thanks for your help.

I will create a bug report using your answer.