NVIC_Init() conflict

Posted on January 31, 2017 at 21:39

In the code excerpt below there appears to be contradictory settings for nvic. NVIC_IRQChannel on the lines commented

// First selection ************************** 

// Second selection **************************

In both calls to NVIC_Init() the address of nvic is used (&nvic). Or am I looking at this wrong?

Thanks,

JH

static void serial_init(void)

{

  USART_InitTypeDef usart;

  NVIC_InitTypeDef nvic;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART8,ENABLE);

 

  USART_DeInit(DebugUart);      //UART8

 

  USART_StructInit(&usart);

  usart.USART_BaudRate = 115200;

  USART_Init(DebugUart, &usart);

  USART_Cmd(DebugUart ,ENABLE);

  USART_DMACmd(DebugUart, USART_DMAReq_Tx|USART_DMAReq_Rx, ENABLE);

 

  nvic.NVIC_IRQChannel = DMA1_Stream6_IRQn;      // First selection **************************

  nvic.NVIC_IRQChannelPreemptionPriority = 5;

  nvic.NVIC_IRQChannelSubPriority = 0;

  nvic.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&nvic);

 

  nvic.NVIC_IRQChannel = DMA1_Stream0_IRQn;      // Second selection **************************

  NVIC_Init(&nvic);

}