两块STM32的 SPI通信，帮看下眼都花了就是不知道问题在哪

tudou

一直接收不到数据，一个都接收不到。错位就算了。郁！！
如果有需要其它内容我也会再贴出来。怕多了看的眼难受！
从机的

void SPI2_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef  SPI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
//SPI GPIO Init PIN13_SCLK PIN15_MOSI
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_13 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//PIN14_MISO
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_14;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);


/* SPI2 configuration */
// data input on the DIO pin is sampled on the rising edge of the CLK. 
// Data on the DO and DIO pins are clocked out on the falling edge of CLK.
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //SPI?è???????????ò?????¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;                        //?è??????SPI,SSI??0
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;                //SPI·???????8?????á??
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;                          //?±???ü????
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;                        //????????????2???±????
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;                           //SSM??1
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;   //?è??·???
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //??????????MSB??????
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC?à??????7
SPI_Init(SPI2, &SPI_InitStructure);

SPI_Cmd(SPI2, ENABLE);


}

主机的：
void SPI2_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef  SPI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
//SPI GPIO Init PIN13_SCLK PIN15_MOSI
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_13 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//PIN14_MISO
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_14;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);


/* SPI2 configuration */
// data input on the DIO pin is sampled on the rising edge of the CLK. 
// Data on the DO and DIO pins are clocked out on the falling edge of CLK.
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //SPI?è???????????ò?????¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;                        //?è??????SPI,SSI??0
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;                //SPI·???????8?????á??
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;                          //?±???ü????
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;                        //????????????2???±????
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;                           //SSM??1
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;   //?è??·???
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //??????????MSB??????
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC?à??????7
SPI_Init(SPI2, &SPI_InitStructure);

SPI_Cmd(SPI2, ENABLE);


}

tudou

应该设定个回复最好的有奖励，可以惜现在没有！