//初始化24L01的IO口
void NRF24L01_Init(void)
{ GPIO_InitTypeDef GPIO_InitStruct;
SPI_InitTypeDef SPI_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB ,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE); //spi2时钟
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStruct);
// GPIO_SetBits(GPIOB,GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15); //PB13/14/15上拉
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE,ENABLE);
/*CE CSN Initial*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_3 ;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4 ;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStruct);
/*IRQ CSN Initial*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOE, &GPIO_InitStruct);
SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
SPI_InitStruct.SPI_Direction= SPI_Direction_2Lines_FullDuplex;
SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStruct.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStruct);
SPI_Cmd(SPI2, ENABLE);
// SPI1_Init(); //初始化SPI
NRF24L01_CE=0; //使能24L01
NRF24L01_CSN=1; //SPI片选取消
}
//========================================spi的代码
void SPI1_SetSpeed(u8 SPI_BaudRatePrescaler)
{
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
SPI2->CR1&=0XFFC7;
SPI2->CR1|=SPI_BaudRatePrescaler; //设置SPI2速度
SPI_Cmd(SPI2,ENABLE);
}
//SPIx 读写一个字节
//TxData:要写入的字节
//返回值:读取到的字节
u8 SPI1_ReadWriteByte(u8 TxData)
{
u8 retry=0;
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET) //检查指定的SPI标志位设置与否:发送缓存空标志位
{
retry++;
if(retry>200)return 0;
}
SPI_I2S_SendData(SPI2, TxData); //通过外设SPIx发送一个数据
retry=0;
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET) //检查指定的SPI标志位设置与否:接受缓存非空标志位
{
retry++;
if(retry>200)return 0;
}
return SPI_I2S_ReceiveData(SPI2); //返回通过SPIx最近接收的数据
}
//======================================================主程序
int main(void)
{
RCC_Configuratio(); // 使能各模块时钟
delay_init(); //初始化延时系统
GPIO_Configuration(); //初始化IO口
ADC1_Configuration(); //初始化AD
DMA_Configuration();
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE); //启动DMA通道
NRF24L01_Init(); //初始化NRF24L01
while(NRF24L01_Check());//检测不到24L01 //一直卡在这里,不能跳出循环
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