SPI乱进中断求助

yangzhen86

我是SPI2与SPI1通信，为什么主机发送数据的时候同时会进入主机的接收中断？太奇怪了，而且不能连发数据，连发的话会多次进入主机接收中断，而不进入第二次从机接收中断
这个是我的SPI2做主机，SPI1做从机的初始化
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB 
                  | RCC_APB2Periph_SPI1, ENABLE); //GPIOD clock ENABLE
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); //TIM2  clock ENABLE



GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); 



   SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
   SPI_InitStructure.SPI_Mode   = SPI_Mode_Master;
   SPI_InitStructure.SPI_DataSize  = SPI_DataSize_16b;
   SPI_InitStructure.SPI_CPOL   = SPI_CPOL_Low;
   SPI_InitStructure.SPI_CPHA   = SPI_CPHA_2Edge;
   SPI_InitStructure.SPI_NSS   = SPI_NSS_Soft;
   SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
   SPI_InitStructure.SPI_FirstBit    = SPI_FirstBit_MSB;
   SPI_InitStructure.SPI_CRCPolynomial  = 7;
   SPI_Init(SPI2, &SPI_InitStructure);
   SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
   SPI_Init(SPI1, &SPI_InitStructure);
   SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_RXNE, ENABLE);
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_RXNE, ENABLE);
   SPI_Cmd(SPI2, ENABLE);
   SPI_Cmd(SPI1, ENABLE);
 
 NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;       
    NVIC_Init(&NVIC_InitStructure);
 
  NVIC_InitStructure.NVIC_IRQChannel = SPI1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_Init(&NVIC_InitStructure);

Rocks

SPI_Direction_2Lines_FullDuplex

你知道這個設定的意思嗎

去讀詳細SPI傳輸協定的工作方式吧