Сама передача происходит, поллинг окончания цикла DMA работает, другие прерывания(в частности Compare/Capture TIM3) функционируют

инициализация NVIC:

  /* Enable DMA1 channel5 IRQ Channel */
  NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

инициализация DMA:

DMA_DeInit(DMA1_Channel5);
  DMA_InitStructure5.DMA_PeripheralBaseAddr = (uint32_t)_SPI2_DR;
  DMA_InitStructure5.DMA_MemoryBaseAddr = (uint32_t)SPI2_TxBuf;
  DMA_InitStructure5.DMA_DIR = DMA_DIR_PeripheralDST;
  DMA_InitStructure5.DMA_BufferSize = TX_BUF_SIZE;
  DMA_InitStructure5.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure5.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure5.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure5.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure5.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure5.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure5.DMA_M2M = DMA_M2M_Disable;  
  DMA_Init(DMA1_Channel5, &DMA_InitStructure5); 
  DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE);
  DMA_ClearITPendingBit(DMA1_IT_GL5);

процедура обработки:

#define PORT_ABIT(GPIO_BASE, BIT) *((volatile unsigned long *)(PERIPH_BB_BASE + 0x20*((GPIO_BASE + 0x0C - PERIPH_BASE))+(4*BIT)))
#define SPI_NSS   PORT_ABIT(GPIOB_BASE, 12)

void DMAChannel5_IRQHandler(void)
{
  /* Test on DMA1 Channel5 Transfer Complete interrupt */
  if(DMA_GetITStatus(DMA1_IT_TC5))
  {
  SPI2_NSS = 1;    

  /* Clear DMA1 Channel5 Half Transfer, Transfer Complete and Global interrupt pending bits */
    DMA_ClearITPendingBit(DMA1_IT_GL5);
  }
}