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- void SPI2_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- SPI_InitTypeDef SPI_InitStructure;
- RCC_APB2PeriphclockCmd(RCC_APB2Periph_GPIOB, ENABLE );//
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE );//
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_15;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //PB13/14/15
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB, &GPIO_InitStructure);//
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14 ;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- 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_8b;
- SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
- 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_Cmd(SPI2, ENABLE);
- SPI2_ReadWriteByte(0xFF);
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