difference between HAL_I2C_Mem_Write() and HAL_I2C_Mem_Write_DMA()

[dspark]

Posted on July 03, 2016 at 10:49

Hello,

I generated the code using the STM32CubeMx.I'm trying to I2C communication between STM32F4(master) and IC(slave, 7bit address).I tested to two functions for I2C communication.HAL_I2C_Mem_Write is OK, but HAL_I2C_Mem_Write_DMA is fail.Test condition and setting parameters are same only except the function.please let me know why HAL_I2C_Mem_Write_DMA() is didn't work.thank you.==================================================================//test code/* I2C1 init function */static void MX_I2C1_Init(void){  hi2c1.Instance = I2C1;  hi2c1.Init.ClockSpeed = 100000;  hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;  hi2c1.Init.OwnAddress1 = 0;  hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;  hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;  hi2c1.Init.OwnAddress2 = 0;  hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;  hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;  if (HAL_I2C_Init(&hi2c1) != HAL_OK)  {    Error_Handler();  }}static void MX_DMA_Init(void) {  /* DMA controller clock enable */  __HAL_RCC_DMA1_CLK_ENABLE();  /* DMA interrupt init */  /* DMA1_Stream0_IRQn interrupt configuration */  HAL_NVIC_SetPriority(DMA1_Stream0_IRQn, 0, 0);  HAL_NVIC_EnableIRQ(DMA1_Stream0_IRQn);  /* DMA1_Stream2_IRQn interrupt configuration */  HAL_NVIC_SetPriority(DMA1_Stream2_IRQn, 0, 0);  HAL_NVIC_EnableIRQ(DMA1_Stream2_IRQn);  /* DMA1_Stream4_IRQn interrupt configuration */  HAL_NVIC_SetPriority(DMA1_Stream4_IRQn, 0, 0);  HAL_NVIC_EnableIRQ(DMA1_Stream4_IRQn);  /* DMA1_Stream6_IRQn interrupt configuration */  HAL_NVIC_SetPriority(DMA1_Stream6_IRQn, 0, 0);  HAL_NVIC_EnableIRQ(DMA1_Stream6_IRQn);}void main(void){         uint8_t error;         uint8_t data[3];         data[0] = 0x47;         error = HAL_I2C_Mem_Write(&hi2c1, 0x82, 0x3f, 1,  data, 1,100); //succeed         error = LT_I2C_Write_DMA(&lt_i2c1_, 0x82, 0x3f, data, 1); //fail}

success: HAL_I2C_Mem_Write(Dev Add: 0x82, Mem Add: 0x3f, data: 0x47)

FAIL: HAL_I2C_Mem_Write_DMA(Dev Add: 0x82, Mem Add: 0x3f, data: 0x47)

[slimen]

Posted on July 03, 2016 at 23:29

Hi,

You can find the needed for your project under this application which can help you as an implementation example to develop your application:STM32Cube_FW_F4_V1.12.0\Projects\STM32F4-Discovery\Examples\I2C\I2C_TwoBoards_ComDMAThis example guides you through the different configuration steps to ensure I2C Data buffer transmission and reception with DMA.Regards

[blacksu6]

Posted on March 11, 2017 at 14:43

Hi

,

I also have the same problem you encountered . Do you have the answer about this defeat issue?  If you solved this problem, can you give me some hints?

P.S.   I2C(API functions) test result as below

   1.

HAL_I2C_Mem_Write

  -->OK

   2.

HAL_I2C_Mem_Read

  -->OK

   3.

HAL_I2C_Mem_Write_DMA

  -->NG

   4 

HAL_I2C_Mem_Read_DMA

  -->OK

Regards             

[6740493]

Posted on May 03, 2017 at 15:42

Hello.

When you use

HAL_I2C_Mem_Write_DMA

 it's freeze because master doesn't send Stop

condition. You must enable I2C event interrupt. In this interrupt call I2C_MasterTransmit_BTF for generate Stop condition.

Regards   

[Sergei Litovko]

Posted on August 02, 2017 at 21:48

Cool! It's works! Thank you.

[Nesrine M_O]

Posted on August 03, 2017 at 10:14

Sergei Litovko wrote:

Cool! It's works! Thank you.

https://community.st.com/0D50X00009bMM5DSAW

 

[dspark]

Posted on February 12, 2018 at 01:22

Thank you.

[Youssouf Coulibaly]

Posted on March 13, 2018 at 10:51

Hi,

Could you please explain what do you mean by enabling I2C event interrupt and call I2C_MasterTransmit_BTF ?

Because I am using the I2C_Mem_Write_DMA and somehow, the code is in interrupt endless loop. 

void I2C1_IRQHandler(void)

{       if(hi2c1->Instance->ISR & (I2C_FLAG_BERR | I2C_FLAG_ARLO | I2C_FLAG_OVR))       {             HAL_I2C_ER_IRQHandler(hi2c1);       }       else       {             HAL_I2C_EV_IRQHandler(hi2c1);       }}

static HAL_StatusTypeDef I2C_Master_ISR_DMA(struct __I2C_HandleTypeDef *hi2c, uint32_t ITFlags, uint32_t ITSources)

{       uint16_t devaddress = 0U;       uint32_t xfermode = 0U;

      /* Process Locked */

      __HAL_LOCK(hi2c);

      ************************

      ************************

      else if(((ITFlags & I2C_FLAG_STOPF) != RESET) && ((ITSources & I2C_IT_STOPI) != RESET))

      {             /* Call I2C Master complete process */             I2C_ITMasterCplt(hi2c, ITFlags);       }

      /* Process Unlocked */

      __HAL_UNLOCK(hi2c);

   return HAL_OK;

}

In 

I2C_Master_ISR_DMA function, the 

 

__HAL_LOCK return a busy flag and cannot proceed with upper layer function in my application. Basically, the program is contenstly in interrupt with dead lock. 

How this could happen on I2C line ?

Is the issue on HAL itself because it is reponsible to take care of all interrupt and lock boolean ?

Thanks in advance for your supports.

Best regards,

[John Craven]

189565CGIL3

[Frank CA]

Posted on April 04, 2018 at 18:00

I recently posted about exactly this issue, unfortunately I had not seen this post, would have saved me some time! My post

https://community.st.com/0D50X00009XkVw0SAF

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