STM32: I2C-Error-Handling IRQ wird nicht aufgerufen

void i2c_init(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  I2C_InitTypeDef I2C_InitStructure;

  NVIC_InitTypeDef NVIC_InitStructure;

  DMA_InitTypeDef DMA_InitStructure;

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOB, &GPIO_InitStructure);

  I2C_DeInit(I2C1);

  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

  I2C_InitStructure.I2C_ClockSpeed = 80000;

  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;

  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;

  I2C_InitStructure.I2C_OwnAddress1 = 0;

  I2C_Init(I2C1, &I2C_InitStructure);

  I2C_ITConfig(I2C1, I2C_IT_EVT, ENABLE);

  I2C_ITConfig(I2C1, I2C_IT_ERR, ENABLE);

  I2C_Cmd(I2C1, ENABLE);

  I2C_DMACmd(I2C1, ENABLE);

  NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

  // DMA Channel 6 - I2C1 TX

  DMA_InitStructure.DMA_BufferSize = 0;

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;

  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) i2c_tx_buffer;

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) & I2C1->DR;

  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_Init(DMA1_Channel6, &DMA_InitStructure);

  // DMA Channel 7 - I2C1 RX

  DMA_InitStructure.DMA_BufferSize = 0;

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) i2c_rx_buffer;

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) & I2C1->DR;

  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_Init(DMA1_Channel7, &DMA_InitStructure);

  DMA_ITConfig(DMA1_Channel7, DMA_IT_TC, ENABLE);

  NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel7_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

  i2c_BusyFlag = 0;

  bldc_communication_enable = 0;

  bldc_communication_BusyFlag = 0;

}

void i2c_send_data(uint8_t address, uint8_t data)

{

  while(i2c_BusyFlag);

  i2c_BusyFlag = 1;

  i2c_deviceAddress = address;

  i2c_tx_buffer[0] = data;

  i2c_DirectionWrite = 1;

  DMA_SetCurrDataCounter(DMA1_Channel6, 1);    // TX

  I2C_GenerateSTART(I2C1, ENABLE);

}

void i2c_read_data(uint8_t address, uint8_t size)

{

  while(i2c_BusyFlag);

  i2c_BusyFlag = 1;

  i2c_deviceAddress = address;

  i2c_DirectionWrite = 0;

  DMA_SetCurrDataCounter(DMA1_Channel7, size);  // RX

  I2C_GenerateSTART(I2C1, ENABLE);

}

void I2C1_EV_IRQHandler(void)

{

  if (I2C_GetFlagStatus(I2C1, I2C_FLAG_SB) == SET)  // Start bit gesendet

  {

    if(i2c_DirectionWrite)              // STM32 Transmitter

      I2C_Send7bitAddress(I2C1, i2c_deviceAddress, I2C_Direction_Transmitter);

    else                      // STM32 Receiver

      I2C_Send7bitAddress(I2C1, i2c_deviceAddress, I2C_Direction_Receiver);

  }

  else if(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) == SUCCESS ||

      I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) == SUCCESS)  // entspricht EV6

  {

    if (i2c_DirectionWrite)              // STM32 Transmitter

    {

      DMA_Cmd(DMA1_Channel6, ENABLE);

    }

    else                      // STM32 Receiver

    {

      I2C_DMALastTransferCmd(I2C1, ENABLE);

      DMA_Cmd(DMA1_Channel7, ENABLE);

    }

  }

  else if(I2C_GetFlagStatus(I2C1, I2C_FLAG_BTF))    // Byte transfer finished

  {

    if(i2c_DirectionWrite)              // STM32 Transmitter

    {

      I2C_GenerateSTOP(I2C1, ENABLE);

      DMA_Cmd(DMA1_Channel6, DISABLE);

      i2c_BusyFlag = 0;

    }

  }

}

void DMA1_Channel7_IRQHandler(void)

{

  DMA_ClearFlag(DMA1_FLAG_TC7);

  I2C_GenerateSTOP(I2C1, ENABLE);

  DMA_Cmd(DMA1_Channel7, DISABLE);

  i2c_BusyFlag = 0;

}

void I2C1_ER_IRQHandler(void)

{

  I2C_GenerateSTOP(I2C1, ENABLE);

  I2C_ClearFlag(I2C1, I2C_FLAG_AF);

  I2C_ClearFlag(I2C1, I2C_FLAG_ARLO);

  I2C_ClearFlag(I2C1, I2C_FLAG_BERR);

  i2c_BusyFlag = 0;

}