/************************發(fā)送部分*********************/

#include
#include
#include
#include
#include

#define uint unsigned int
#define uchar unsigned char

//nRF24L01的數(shù)據(jù)寬度，地址寬度，以及數(shù)據(jù)定義
#define TX_ADR_WIDTH 4 //地址數(shù)據(jù)
#define RX_PLOAD_WIDTH 4 //接收的有效數(shù)據(jù)寬度
#define TX_PLOAD_WIDTH 4 //發(fā)送的有效數(shù)據(jù)寬度
#define BUSY SPI0CFG&0x80

uchar TX_ADDRESS[]={0xe7,0xe7,0xe7,0xe7}; //傳送接收端地址
uchar shuzu[4]={0x99,0x99,0xc7,0x99}; //要發(fā)送的有效數(shù)據(jù)
uchar rx_buf[4]={0x00,0x00,0x00,0x00}; //接收的數(shù)據(jù)緩存
uchar a,b,i;
ucharsta;

//引腳定義2274
#define CSN_HIGH CSN=1
#define CSN_LOW CSN=0
#define CE_HIGH CE=1
#define CE_LOW CE=0

sbit CE=P0^5;
sbit CSN=P0^6;
sbit IRQ=P0^4;
sbit c=P0^7;

//24L01寄存器地址
#define CONFIG 0X00//配置寄存器地址
#define EN_AA 0X01//自動應(yīng)答寄存器地址
#define EN_RXADDR 0X02//接收地址使能
#define SETUP_AW 0X03//設(shè)置地址寬度
#define SETUP_RETR 0X04//建立自動重發(fā)
#define RF_CH 0X05//射頻通道
#define RF_SETUP 0X06//射頻寄存器
#define STATUS 0X07//狀態(tài)寄存器
#define OBSERVE_TX 0X08//發(fā)送檢測寄存器
#define CD 0X09//載波檢測
#define RX_ADDR_P0 0X0A//數(shù)據(jù)通道0接收地址
#define RX_ADDR_P1 0X0B
#define RX_ADDR_P2 0X0C
#define RX_ADDR_P3 0X0D
#define RX_ADDR_P4 0X0E
#define RX_ADDR_P5 0X0F
#define TX_ADDR 0X10//發(fā)送地址寄存器地址
#define RX_PW_P0 0X11//接收地址通道0有效數(shù)據(jù)寬度
#define RX_PW_P1 0X12
#define RX_PW_P2 0X13
#define RX_PW_P3 0X14
#define RX_PW_P4 0X15
#define RX_PW_P5 0X16
#define FIFO_STATUS 0X17//FIFO狀態(tài)寄存器
//SPI命令字
#define READ_REG 0X00//讀寄存器命令
#define WRITE_REG 0X20//寫寄存器命令
#define RD_RX_PLOAD 0X61//讀有效數(shù)據(jù)命令
#define WR_TX_PLOAD 0XA0//寫有效數(shù)據(jù)命令
#define FLUSH_TX 0XE1//清除TX_FIFO應(yīng)用于發(fā)射模式
#define FLUSH_RX 0XE2//清除RX_FIFO應(yīng)用于接收模式
#define REUSE_TX_PL 0XE3//重新使用上一包有效數(shù)據(jù)
#define NOP 0XFF//空操作指令

void dat_int(void)
{
CSN_HIGH;
CE_LOW;
a=0;
c=0;
}

void sysclk(void) //內(nèi)部晶振
{
OSCICL=0xb3; // 0x83
OSCICN=0xc2; //二分頻
CLKSEL=0x00;
}

//延時子函數(shù)us
void delay(uint i)
{
while(i--)
;
}

uchar SPI_RW(uchar byte) //用SPI讀寫一字節(jié)的數(shù)據(jù)
{
uchar rbyte;

SPI0DAT=byte;
while(!SPIF);
rbyte=SPI0DAT;
SPIF=0;
delay(15);
return rbyte;
}

uchar SPI_RW_Reg(uchar reg,uchar value) //向寄存器寫一字節(jié)的數(shù)據(jù)，同時返回狀態(tài)字
{
uchar status;
CSN_LOW;
SPI0DAT=reg;
while(!SPIF);
delay(20);
status=SPI0DAT;
SPIF=0;
SPI0DAT=value;
while(!SPIF);
SPIF=0;
CSN_HIGH;
return(status);
}

uchar SPI_Read(uchar reg) //從寄存器讀出一字節(jié)的數(shù)據(jù)
{
uchar byte;
CSN_LOW;
SPI0DAT=reg;
while(!SPIF);
delay(20);
SPI0DAT=0x00;
SPIF=0;
while(!SPIF);
byte=SPI0DAT;
SPIF=0;
CSN_HIGH;
return byte;
}

uchar SPI_Read_Buf(uchar reg,uchar *pBuf,uchar bytes) //從reg讀出bytes字節(jié)的數(shù)據(jù)
{
uchar status,byte_ctr;
CSN_LOW;

status=SPI_RW(reg);
for(byte_ctr=0;byte_ctr pBuf[byte_ctr]=SPI_RW(0);

CSN_HIGH;
return status;
}

uchar SPI_RW_Buf(uchar reg,uchar *pBuf,uchar bytes) //向reg寫入bytes字節(jié)的數(shù)據(jù)
{
uchar status,byte_ctr;
CSN_LOW;

status=SPI_RW(reg);
for(byte_ctr=0;byte_ctr SPI_RW(pBuf[byte_ctr]);

CSN_HIGH;
returnstatus;
}

//接收函數(shù)，接收返回1表示有數(shù)據(jù)收到
uchar nRF24L01_RxPacket(uchar *rx_buf)
{
uchar sta;
uchar revale=0;
SPI_RW_Reg(WRITE_REG+CONFIG,0X0F);
SPI_RW_Buf(WRITE_REG+RX_ADDR_P0,TX_ADDRESS,TX_ADR_WIDTH);//定義接收通道號

CE_HIGH; //開始接收數(shù)據(jù)
delay(130);

sta=SPI_Read(READ_REG+STATUS);//接收狀態(tài)寄存器，用于判斷是否收到數(shù)據(jù)
if(sta&0x40)
{
CE_LOW; //結(jié)束接收數(shù)據(jù)
SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);
revale=0xff;
}

SPI_RW_Reg(WRITE_REG+STATUS,sta); //接收復(fù)位
return revale;
}

void nRF24L01_TxPacket(uchar *tx_buf) //發(fā)送函數(shù)
{
CE_LOW;

SPI_RW_Buf(WRITE_REG+TX_ADDR,TX_ADDRESS,TX_ADR_WIDTH); //給發(fā)送寄存器寫入地址，寬度為TX_ADR_WIDTH

SPI_RW_Buf(WRITE_REG+RX_ADDR_P0,TX_ADDRESS,TX_ADR_WIDTH);//給接收寄存器寫入地址，寬度也為TX_ADR_WIDTH
SPI_Read_Buf(RX_ADDR_P0,rx_buf,TX_ADR_WIDTH);

SPI_RW_Buf(WR_TX_PLOAD,tx_buf,TX_PLOAD_WIDTH); //向發(fā)送寄存器寫入TX_PLOAD_WIDTH寬度的數(shù)據(jù)，

SPI_RW_Reg(WRITE_REG+CONFIG,0X0E); //配置為PWR_UP位，使能CRC，16位校驗，發(fā)送模式

CE_HIGH;
delay(100);
CE_LOW;

}