stm32 usart DMA 双缓冲中断进不去的解决办法？

#include "FreeRTOS.h"
#include "STM32f4xx.h"
#include "stm32f4xx_dma.h"
#include "queue.h"
#include "task.h"
#include "zigbee_task.h"
#include "bsp_zigbee.h"
unsigned char gcav_Usart1DmaRxBuffer[2][1024];
unsigned char gcav_Usart1DmaTxBuffer[2][1024] = {{1},{'+','+','+',}};
void zigbee_usart1_init()
{
    GPIO_InitTypeDef GPIO_InitStruct;
    USART_InitTypeDef UART_InitStruct;
    NVIC_InitTypeDef NVIC_InitStruct;
    DMA_InitTypeDef DMA_InitStruct;
    /*浣胯兘GPIOB&USART&DMA2*/
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);
    /*GPIO閰嶇疆*/
    /*澶嶇敤GPIO*/
    GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_USART1);
    GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_USART1);
    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;        
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOB,&GPIO_InitStruct);
    USART_DeInit(USART1);
    UART_InitStruct.USART_BaudRate = 115200;
    UART_InitStruct.USART_StopBits = USART_StopBits_1;
    UART_InitStruct.USART_Parity = USART_Parity_No;
    UART_InitStruct.USART_WordLength = USART_WordLength_8b;
    UART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    UART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_Init(USART1, &UART_InitStruct);
        /*涓柇閰嶇疆*/
    NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 5;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);
    /*涓柇浣胯兘*/
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
    /*涓插彛浣胯兘*/
    USART_Cmd(USART1, ENABLE);
    /*RX*/
    /*鍏抽棴DMA閫氶亾*/
    DMA_DeInit(DMA2_Stream5);
    while(DMA_GetCmdStatus(DMA2_Stream5) != DISABLE);
    DMA_InitStruct.DMA_Channel = DMA_Channel_4;
    DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&USART1->DR;
    DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)&gcav_Usart1DmaRxBuffer[0];
    DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStruct.DMA_BufferSize = 1024;
    DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStruct.DMA_Priority = DMA_Priority_VeryHigh;
    DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_DoubleBufferModeConfig(DMA2_Stream5, (uint32_t)&gcav_Usart1DmaRxBuffer[1], DMA_Memory_0);
    DMA_DoubleBufferModeCmd(DMA2_Stream5, ENABLE);
    DMA_Init(DMA2_Stream5, &DMA_InitStruct);
        /*涓柇浣胯兘*/
   // DMA_ITConfig(DMA2_Stream5, DMA_IT_TC, ENABLE);
     /*TX*/
    DMA_DeInit(DMA2_Stream7);
    while(DMA_GetCmdStatus(DMA2_Stream7) != DISABLE);
    DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)&gcav_Usart1DmaTxBuffer[0];
    DMA_InitStruct.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    DMA_DoubleBufferModeConfig(DMA2_Stream7, (uint32_t)&gcav_Usart1DmaTxBuffer[1], DMA_Memory_0);
    DMA_DoubleBufferModeCmd(DMA2_Stream7, ENABLE);
    DMA_Init(DMA2_Stream7, &DMA_InitStruct);
    /*DMA TX*/
    NVIC_InitStruct.NVIC_IRQChannel = DMA2_Stream7_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);
    /*涓柇浣胯兘*/
    DMA_ITConfig(DMA2_Stream7, DMA_IT_TC, ENABLE);
    /*DMA浣胯兘*/
    DMA_Cmd(DMA2_Stream5, ENABLE);
    USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
    USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
}
/**
USART1 中断函数
**/
void USART1_IRQHandler(void)
{
    zigbee_msg_st ltv_Msg;
    BaseType_t ltv_HigherPriorityTaskWoken;
        
  if(USART_GetITStatus(USART1, USART_IT_IDLE) != RESET){
          //关闭，防干扰
    DMA_Cmd(DMA2_Stream5, DISABLE);
        
    /*获取当前正在使用的buff*/
    ltv_Msg.mcv_RxIndex = DMA_GetCurrentMemoryTarget(DMA2_Stream5);
    ltv_Msg.mcv_TxIndex = DMA_GetCurrentMemoryTarget(DMA2_Stream7);
    /*切换buff*/
    DMA_DoubleBufferModeCmd(DMA2_Stream5, DISABLE);
    if(!ltv_Msg.mcv_RxIndex) {
       DMA_DoubleBufferModeConfig(DMA2_Stream5, (uint32_t)&gcav_Usart1DmaRxBuffer[0], DMA_Memory_1);
     } else {
       DMA_DoubleBufferModeConfig(DMA2_Stream5, (uint32_t)&gcav_Usart1DmaRxBuffer[1], DMA_Memory_0);
     }
         DMA_DoubleBufferModeCmd(DMA2_Stream5, ENABLE);
         
    ltv_Msg.msv_RcvLen=1024-DMA_GetCurrDataCounter(DMA2_Stream5);
        /**重新定义长度 下次接收**/
    DMA_SetCurrDataCounter(DMA2_Stream5, 1024);
    DMA_Cmd(DMA2_Stream5, ENABLE);
        USART1->SR;
        USART1->DR;
                /*Send Msg*/
        xQueueSendFromISR(gtv_ZigbeeTaskMsgQueueHandle,    }
}
/**
  * @brief  DMA1 Usart1 Tx 涓柇鍑芥暟
  * @param  None
  * @retval None
  */
void DMA2_Stream7_IRQHandler(void)
{
    if(DMA_GetITStatus(DMA2_Stream7, DMA_IT_TCIF7) != RESET) {
        DMA_Cmd(DMA2_Stream7, DISABLE);
        DMA_ClearFlag(DMA2_Stream7, DMA_IT_TCIF7);
    }
}
/**
  * @brief  USART1 鏁版嵁鍙戦

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