STM32F207的SPI配置问题！！！！！！！！

liu_wenju 提问时间：2011-12-1 08:43 /

STM32F207的SPI配置问题！！！！！！！！

                                   在调试207的SPI过程中遇到了一个奇怪的问题，求助于各位大侠了
         在调试过程中发现，stm32f207的SPI口中所有的输入口好像都不工作，输出口工作正常，不知道什么原因
         SPI口配置代码如下：
            GPIO_InitTypeDef GPIO_InitStructure;

         SPI_InitTypeDef SPI_InitStructure;

         RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
         RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);

         GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_SPI1);
         GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_SPI1);
         GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_SPI1);

         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
         GPIO_InitStructure.GPIO_OType =GPIO_OType_PP;
         GPIO_InitStructure.GPIO_Pin = IO_PIN_BUS_CS;
         GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
         GPIO_Init(IO_PORT_BUS_CS,&GPIO_InitStructure);

         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
         GPIO_InitStructure.GPIO_OType =GPIO_OType_PP;
         GPIO_InitStructure.GPIO_Pin = IO_PIN_BUS_MISO;
         GPIO_Init(IO_PORT_BUS_MISO,&GPIO_InitStructure);

         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
         GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
         GPIO_InitStructure.GPIO_Pin = IO_PIN_BUS_SCK;
         GPIO_Init(IO_PORT_BUS_SCK,&GPIO_InitStructure);

         GPIO_InitStructure.GPIO_Pin = IO_PIN_BUS_MOSI;
         GPIO_Init(IO_PORT_BUS_MOSI,&GPIO_InitStructure);

         SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
         SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
         SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
         SPI_InitStructure.SPI_CRCPolynomial = 0;
         SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
         SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
         SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
         SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
         SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
         SPI_Init(SPI1, &SPI_InitStructure);

         SPI_CalculateCRC(SPI1, DISABLE);

            NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
            NVIC_InitStructure.NVIC_IRQChannel = SPI1_IRQn;
            NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0 ;
            NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2 ;
            NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
            NVIC_Init(&NVIC_InitStructure);
         wvSpiItEnable();

         SPI_Cmd(SPI1,ENABLE);
         期待得到答案，重复问题:spi口的输入性质的口好像都不工作，时钟和输入口都没工作，望高手帮我看看，期待。。。。。。