void NRF_Init(void){
Delay_us(100);
CE=0; // chip enable
CSN=1; // Spi disable
SCK=0; // Spi clock line init high
SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // 写本地地址
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); // 写接收端地址
SPI_WriteReg(WRITE_REG + EN_AA, 0x01); // 频道0自动 ACK应答允许
SPI_WriteReg(WRITE_REG + EN_RXADDR, 0x01); // 允许接收地址只有频道0，如果需要多频道可以参考Page21
SPI_WriteReg(WRITE_REG + RF_CH, 40); // 设置信道工作为2.4GHZ，收发必须一致
SPI_WriteReg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); //设置接收数据长度，本次设置为20字节
SPI_WriteReg(WRITE_REG + RF_SETUP, 0x07); //设置发射速率为1MHZ，发射功率为最大值0dB
}
void NRF_Send(uchar * buf_send){
CE=0; //StandBy I模式
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // 装载接收端地址
SPI_Write_Buf(WR_TX_PLOAD, buf_send, TX_PLOAD_WIDTH); // 装载数据
SPI_WriteReg(WRITE_REG + CONFIG, 0x0e); // IRQ收发完成中断响应，16位CRC，主发送
CE=1; //置高CE，激发数据发送
Delay_us(10);
}
void MFRC522_WriteRegister(uint8_t addr, uint8_t val)
{
RF_Activate();
// Address format:0XXXXXX0
addr = (addr << 1) & 0x7E; // Address format: 0XXXXXX0
SPI_WriteReg(addr, val);
RF_Deactivate();
}
void NRF_Receive(uchar * buf_recv){
//uchar revale=0;
sta=SPI_ReadReg(STATUS); // 读取状态寄存其来判断数据接收状况
if(Flag_Receive) // 判断是否接收到数据
{
CE = 0; //SPI使能
SPI_Read_Buf(RD_RX_PLOAD,buf_recv,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffer
//revale =1; //读取数据完成标志
}
SPI_WriteReg(WRITE_REG+STATUS,sta); //接收到数据后RX_DR,TX_DS,MAX_PT都置高为1，通过写1来清楚中断标志
}
void NRF_setMode_Send(){
CE=0;
SPI_WriteReg(WRITE_REG + CONFIG, 0x0e); // IRQ收发完成中断响应，16位CRC，主发送
CE = 1;
Delay_us(130);
}
void NRF_setMode_Receive(){
CE=0;
SPI_WriteReg(WRITE_REG + CONFIG, 0x0f); // IRQ收发完成中断响应，16位CRC ，主接收
CE = 1;
Delay_us(130);
}
