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)

[QBui]

Hi Sergei. Can you tell how you fix it problem please. Is it true to add the following code to main.c

void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c)

{

if(hi2c->Instance==hi2c1.Instance)

{

I2C_MasterTransmit_BTF(hi2c);

}

}

[QBui]

Hi. Can you tell how you fix it problem please. Is it true to add the following code to main.c

void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c)

{

if(hi2c->Instance==hi2c1.Instance)

{

I2C_MasterTransmit_BTF(hi2c);

}

}

[Mohan1]

Hello dspark, i want to ask you one thing that you given data=0x47,what does it mean,means which data?