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G
Ganesh-K-Grg
Visitor II
June 3, 2024
Solved

HAL_I2C_Mem_Write_DMA issue

  • June 3, 2024
  • 1 reply
  • 2547 views

Hi There,

I have searched a lot about the  HAL_I2C_Mem_Write_DMA problem and seems like i have not found anywhere else this issue has been solved.

Can anyone contribute if someone has solved it.

 

Thanks

    This topic has been closed for replies.
    Best answer by Ganesh-K-Grg

    Hi Andrew,

    I found the solution from this link:-

    https://community.st.com/t5/stm32-mcus-products/hal-i2c-dma-bugs-why-does-this-simple-dma-code-not-work/td-p/136667

     

    I need to add below code and enable the I2c event interrupt. Seems working fine. But I need to tune my code a little bit more.

     

    void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
	if (hi2c->Instance==hi2c1.Instance)
	{
		HAL_DMA_Abort_IT(hi2c->hdmatx);
	}
}

void HAL_I2C_MemRxCpltCallback(I2C_HandleTypeDef *hi2c)
{
	if (hi2c->Instance==hi2c1.Instance)
	{
		HAL_DMA_Abort_IT(hi2c->hdmatx);
	}
}

     

     

    1 reply

    A
    Andrew Neil
    Super User
    June 3, 2024
    @Ganesh-K-Grg wrote:

    the  HAL_I2C_Mem_Write_DMA problem

    what problem?

      G
      Ganesh-K-GrgAuthor
      Visitor II
      June 4, 2024

      Hi Evangelist,

      Calling a write function to write about 6 bytes. But it keeps sending contineously a lot of data.

      HAL_StatusTypeDef ret = HAL_I2C_Mem_Write_DMA(&hi2c1, (20 << 1) | 0, 4, 1, &to_reg[0], 6);

       

      GaneshKGrg_0-1717490730993.png

       

      A
      Andrew Neil
      Super User
      June 4, 2024

      Does it work without DMA - ie, using HAL_I2C_Mem_Write ?

      Please show a minimum but complete example which illustrates the problem.

      What slave device are you using? Show your schematic of how it's connected.

      Are you getting ACKs from the slave?

       

      Please use this button to properly post source code:

      AndrewNeil_0-1717493634578.png

       

      https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228

       

       

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