STM32 ILI9341 SPI with DMA

u8 dmaWorking = 0;
DMA_InitTypeDef dma8, dma16;

void dmaInit() {
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

  // DMA 8bit
  DMA_StructInit(&dma8);
  dma8.DMA_PeripheralBaseAddr = (u32) & (SPI1->DR);
  dma8.DMA_DIR = DMA_DIR_PeripheralDST;
  dma8.DMA_MemoryInc = DMA_MemoryInc_Enable;
  dma8.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  dma8.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  dma8.DMA_Priority = DMA_Priority_High;

  // DMA 16bit
  DMA_StructInit(&dma16);
  dma16.DMA_PeripheralBaseAddr = (u32) & (SPI1->DR);
  dma16.DMA_DIR = DMA_DIR_PeripheralDST;
  dma16.DMA_MemoryInc = DMA_MemoryInc_Enable;
  dma16.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  dma16.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  dma16.DMA_Priority = DMA_Priority_High;

  // IRQs
  NVIC_EnableIRQ(DMA1_Channel3_IRQn);
  DMA_ITConfig(DMA1_Channel3, DMA_IT_TC, ENABLE);
  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
}

void dmaSend(u8 *data, u32 n) {
  dma8.DMA_MemoryBaseAddr = (u32)data;
  dma8.DMA_BufferSize = n;
  DMA_Init(DMA1_Channel3, &dma8);
  dmaWorking = 1;
  TFT_CS_RESET;
  DMA_Cmd(DMA1_Channel3, ENABLE);
}

void dmaSend16(u16 *data, u16 n) {
  dma16.DMA_MemoryBaseAddr = (u32)data;
  dma16.DMA_BufferSize = n;
  DMA_Init(DMA1_Channel3, &dma16);
  dmaWorking = 1;
  TFT_CS_RESET;
  DMA_Cmd(DMA1_Channel3, ENABLE);
}

#define dmaWait()    \
  while (dmaWorking) \
    ;

void dmaSendData8(u8 *data, u16 n) {
  TFT_DC_SET;
  dmaSend(data, n);
  dmaWait();
}

void dmaSendData16(u16 *data, u16 n) {
  TFT_DC_SET;
  dmaSend16(data, n);
  dmaWait();
}

// TX
void DMA1_Channel3_IRQHandler(void) {
  if (DMA_GetITStatus(DMA1_IT_TC3)) {
    DMA_ClearITPendingBit(DMA1_IT_TC3);
    DMA_Cmd(DMA1_Channel3, DISABLE);
    TFT_CS_SET;
    dmaWorking = 0;
  }
}

void dmaSendCmd(u8 cmd) {
  TFT_DC_RESET;
  dmaSend(&cmd, 1);
  dmaWait();
}