各位同学，由于我不太擅长SMT32F4使用库函数写代码，求把NVIC部分的这段代码改成寄存器版的代码，谢谢啦

  /* Configure the Priority Group to 1 bit */                   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);      /* Configure the SPI interrupt priority */   NVIC_InitStructure.NVIC_IRQChannel = SPIx_IRQn;   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   NVIC_Init(&NVIC_InitStructure);