********************************************
//******* uchar SPI_RW(uchar date) 读写SPI
//**************************************************
uchar SPI_RW(uchar date)
{
SPDR=date;
while(!(SPSR&(1
return SPDR;
}
//**************************************************
//*******uchar SPI_Read(uchar reg) 读24L01寄存器
//**************************************************
uchar SPI_Read(uchar reg)
{
uchar reg_val;
Low_24L01_CSN;
SPI_RW(reg);
reg_val = SPI_RW(0);
Hign_24L01_CSN;
return(reg_val);
}
//**************************************************
//******* uchar SPI_RW_Reg(uchar reg, uchar value)
// 写24L01寄存器
//**************************************************
uchar SPI_RW_Reg(uchar reg, uchar value)
{
uchar status;
Low_24L01_CSN;
status = SPI_RW(reg);
SPI_RW(value);
Hign_24L01_CSN;
return(status);
}
//**************************************************
//******* uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bites)
// 读24L01 寄存器BUFF
//**************************************************
uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bites)
{
uint status1,uchar_ctr;
Low_24L01_CSN;
status1 = SPI_RW(reg);
for(uchar_ctr=0;uchar_ctr
pBuf[uchar_ctr] = SPI_RW(0);
Hign_24L01_CSN;
return(status1);
}
//**************************************************
//******* uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bites)
// 写24L01 寄存器BUFF
//**************************************************
uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bites)
{
uchar status1,uchar_ctr;
Low_24L01_CSN; //SPI使能
status1 = SPI_RW(reg);
for(uchar_ctr=0; uchar_ctr
SPI_RW(*pBuf++);
Hign_24L01_CSN; //关闭SPI
return(status1); //
}
//**************************************************
//******* void SetRX_Mode(void)
// 接收模式设置
//**************************************************
void SetRX_Mode(void)
{
Low_24L01_CE;
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); //写接收地址
SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); //0通道自动应答
SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); //数据通道0
SPI_RW_Reg(WRITE_REG + RF_CH,0); //射频通道
SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH);//写通道0 接受数据长度
SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); //0db 1M
SPI_RW_Reg(WRITE_REG + CONFIG, 0x0f); //接收模式
Hign_24L01_CE; //开始接收
delayus(200);//注意不能太小
}
//**************************************************
//******* uchar nRF24L01_RxPacket(uchar* rx_buf)
// 接收数据包
//**************************************************
uchar nRF24L01_RxPacket(uchar* rx_buf)
{
uchar sta,flag=0;
sta=SPI_Read(STATUS); // 读取状态寄存其来判断数据接收状况
if(sta&0x40) // 判断是否接收到数据RX_DR==1?
{
Low_24L01_CE; // StandBy I模式
SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffer
flag =1; //读取数据完成标志
}
SPI_RW_Reg(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
return (flag);
}
//**************************************************
//******* void nRF24L01_TxPacket(uchar * tx_buf)
// 发送数据包
//**************************************************
void nRF24L01_TxPacket( uchar * tx_buf)
{
uchar sta=0;
uchar flag=0;
Low_24L01_CE; //StandBy I模式
SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH);
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, tx_buf, TX_PLOAD_WIDTH); // 装载数据
SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); //
SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); //
SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1f); //500+86us
SPI_RW_Reg(WRITE_REG + RF_CH, 0); //
SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); //
SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); // IRQ收发完成中断响应，16位CRC，主发送
