NRF24L01单片机驱动程序

void delay_24l01ms(uchar t) //延时t毫秒
{
uchar i1;
while(t--)
{
for (i1=0;i1<66;i1++)
{
_nop_();
_nop_();
}
}
}
//-----------------------------------------------------------------------
#define RX_ADDR_P1 0x0B // 'RX address pipe1' register address
#define RX_ADDR_P2 0x0C // 'RX address pipe2' register address
#define RX_ADDR_P3 0x0D // 'RX address pipe3' register address
#define RX_PW_P3 0x14 // 'RX payload width, pipe3' register address
#define RX_PW_P4 0x15 // 'RX payload width, pipe4' register address
#define RX_PW_P5 0x16 // 'RX payload width, pipe5' register address
#define FIFO_STATUS 0x17 // 'FIFO Status Register' register address
//-------------------------------------------------------------------
// Define SPI pins
#define READ_REG 0x00 // Define read command to register
#define WRITE_REG 0x20 // Define write command to register
#define RD_RX_PLOAD 0x61 // Define RX payload register address
uchar TX_BUF[TX_PLOAD_WIDTH];
//uchar flag;
uchar bdata sta;
sbit RX_DR =sta^6;
sbit TX_DS =sta^5;
sbit MAX_RT=sta^4;
//--------------------------------------------------------------------
//描述：写一个字节数据到reg寄存器，同时返回状态字节
uchar SPI_RW_Reg(uchar reg,uchar value)
{
uchar status;
CSN=0; //SPI使能，开始传输数据
status=SPI_RW(reg); //选择寄存器，同时返回状态字节
SPI_RW(value); //写数据到该寄存器
CSN=1; //拉高CSN，结束数据传输
return(status); //返回状态寄存器
}
//---------------------------------------------------------------------------
reg_val=SPI_RW(0); // 然后从该寄存器读数据
CSN=1; // CSN拉高，结束数据传输
return(reg_val); // 返回寄存器数据
}
*/
//---------------------------------------------------------------------------
sbit MISO = P0^2; // Master In, Slave Out pin (input to 51)
sbit MOSI = P0^4; // Serial Clock pin, (output to 51)
sbit SCK = P0^1; // Master Out, Slave In pin (output to 51)
MOSI=(byte & 0x80); //byte最高位输出到MOSI
byte=(byte<<1); //低一位向上移位
SCK=1; //拉高SCK,NRF2401从MOSI读入1位数据,同时从MISO输出1位数据
byte=(byte | MISO); //读出MISO到byte的最低位
SCK=0; //SCK置低
}
return (byte);
}
//-------------------------------------------------------------------------
//函数：SPI_RW_Reg()
#include <reg51.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define ulint unsigned long int
// SPI(nRF24L01) commands
/*
//函数：SPI_Read_1byte()
//描述：从reg寄存器读一字节
uchar SPI_Read_1byte(uchar reg)
{
uchar reg_val;
CSN=0; // CSN置低，开始传输数据
SPI_RW(reg); // 选择寄存器
void init_24l01()
{
CE =0; //待机模式
CSN=1; //SPI禁止
SCK=0; //SPI时钟置低
IRQ=1; //中断复位，不允许中断
//LED=0xff; //关闭指示灯
}
//---------------------------------------------------------------------
#define RF_CH 0x05 // 'RF channel' register address
#define RF_SETUP 0x06 // 'RF setup' register address
#define STATUS 0x07 // 'Status' register address
#define RX_PW_P0 0x11 // 'RX payload width, pipe0' register address
#define RX_PW_P1 0x12 // 'RX payload width, pipe1' register address
#define RX_PW_P2 0x13 // 'RX payload width, pipe2' register address
// SPI(nRF24L01) registers(addresses)
#define CONFIG 0x00 // 'Config' register address
#define EN_AA 0x01 // 'Enable Auto Acknowledgment' register address
//函数：SPI_RW()
//描述：根据SPI协议，写一个字节数据到NRF24L01(从高位到低位)，
// 同时从NRF24L01读出一个字节（从低位到高位）。
uchar SPI_RW(uchar byte)
{
uchar i1;
{
sbit CE = P0^0; // Chip Enable pin signal (output to 51)
sbit CSN = P0^5; // Slave Select pin, (output to CSN, nRF24L01)
sbit IRQ = P0^3; // Interrupt signal, from nRF24L01 (input to 51)
#define RX_ADDR_P4 0x0E // 'RX address pipe4' register address
#define RX_ADDR_P5 0x0F // 'RX address pipe5' register address
#define TX_ADDR 0x10 // 'TX address' register address
/*
void delay_24l01us(uchar t) //延时t*2微秒
{
while(t--)
{
_nop_();
_nop_();
}
}
*/
//----------------------------------------------------------------------
#define OBSERVE_TX 0x08 // 'Observe TX' register address
#define CD 0x09 // 'Carrier Detect' register address