请问各位贴吧大神，我的F4 I2S始终进不了中断，各位帮小弟看看吧，折腾了我一天了。以下是我的I2S配置！！！
GPIO_InitTypeDef GPIO_InitStructure;
I2S_InitTypeDef I2S_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);

GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;

GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_13;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2);

GPIO_InitStructure.GPIO_Pin   =  GPIO_Pin_3;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource3, GPIO_AF_SPI2);

SPI_I2S_DeInit(I2S);
I2S_StructInit(&I2S_InitStructure);
I2S_InitStructure.I2S_AudioFreq = I2S_AudioFreq_32k;
I2S_InitStructure.I2S_Standard = I2S_Standard_LSB;
I2S_InitStructure.I2S_DataFormat = I2S_DataFormat_16b;
I2S_InitStructure.I2S_CPOL = I2S_CPOL_High;
I2S_InitStructure.I2S_Mode = I2S_Mode_MasterRx;
I2S_InitStructure.I2S_MCLKOutput = I2S_MCLKOutput_Disable;
I2S_Init(I2S, &I2S_InitStructure);

SPI_I2S_ITConfig(I2S, SPI_I2S_IT_RXNE, ENABLE);
I2S_Cmd(I2S, ENABLE);

NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);