STM32F407硬件SPI配置

void SPI1_init(void) //SPI1口初始化
{

	GPIO_InitTypeDef  GPIO_InitStructure;
	SPI_InitTypeDef  SPI_InitStructure;		
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);   //使能GPIOA时钟
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);      //使能SPI1时钟

//Configure SPI1 pins: SCK, MISO and MOSI

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;  //管脚SPI复用 (PA5:SPI1_SCK,PA6:SPI1_MISO,PA7:SPI1_MOSI)
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;         //复用 
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;      //推挽输出
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;          //上拉
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   
	GPIO_Init(GPIOA, &GPIO_InitStructure);                      //配置到管脚
	
	GPIO_PinAFConfig(GPIOA,5,GPIO_AF_SPI1);
	GPIO_PinAFConfig(GPIOA,6,GPIO_AF_SPI1);
	GPIO_PinAFConfig(GPIOA,7,GPIO_AF_SPI1);

//SPI模块配置

	SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;         //SPI设置为双线双向全双工
	SPI_InitStructure.SPI_Mode = SPI_Mode_Master;          //设置为主SPI
	SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;      //8位帧数据结构
	SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;             //同步时钟的空闲状态为高电平
	SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;          //同步时钟的第二个跳变沿（上升或下降）数据被采样
	SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;                 //NSS 信号由硬件(NSS管脚)还是软件(使用 SSI位)管理:内部NSS信号由SSI位控制 
	SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;  //波特率预分频值为256
	SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;       //数据传输从MSB位开始
	SPI_InitStructure.SPI_CRCPolynomial = 7;                  //CRC计算的多项式
	SPI_Init(SPI1, &SPI_InitStructure);                               //配置到SPIx寄存器
			
	SPI_Cmd(SPI1, ENABLE);    //使能SPI外设	 

}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
unsigned char SPI1_TransmitByte(unsigned char TxData)
{

	while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);//等待发送区空  	
	SPI_I2S_SendData(SPI1, TxData);       //SPIx发送一个byte  数据		
	while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET); //等待接收完一个byte   
	return SPI_I2S_ReceiveData(SPI1); //返回接收的数据	 		    

}