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楼主 |
发表于 2016-11-7 17:22:20
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void NRF24L01_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOD, ENABLE); //使能PB,G端口时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //PB12上拉 防止W25X的干扰
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化指定IO
GPIO_SetBits(GPIOB,GPIO_Pin_12);//上拉
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_8; //PG8 7 推挽
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化指定IO
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //IRQ
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PG6 输入
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8);//PG6,7,8上拉
SPI2_Init(); //初始化SPI
SPI_Cmd(SPI2, DISABLE); // SPI外设不使能
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; //SPI主机
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //发送接收8位帧结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //时钟悬空低
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //数据捕获于第1个时钟沿
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS信号由软件控制
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16; //定义波特率预分频的值:波特率预分频值为16
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //数据传输从MSB位开始
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC值计算的多项式
SPI_Init(SPI2, &SPI_InitStructure); //根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器
SPI_Cmd(SPI2, ENABLE); //使能SPI外设
NRF24L01_CE=0; //使能24L01 D8
NRF24L01_CSN=1; //SPI片选取消 D7
} |
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