NRF24L01头文件 - - Powered by Discuz!

#include <macros.h>
#define uchar unsigned char
#define uint unsigned int
//------------------------------------------------------------------------------
//spi标志
#define DDR_SPI DDRB
#define DD_MOSI 5
#define DD_SCK 7
#define DD_SS 4
//--------------------------------NRF24L01接口定义--------------------------------
//------------------------------------------------------------------------------
//#define NRF24L01_MISO PB6 //输入0
#define Hign_24L01_MISO PORTB|=(1 << PB6)
#define Low_24L01_MISO PORTB &= ~(1 << PB6)
#define Read_24L01_MISO PINB & (1 << PB6)
//#define NRF24L01_MOSI PB5 //输出1
#define Hign_24L01_MOSI PORTB |= (1 << PB5)
#define Low_24L01_MOSI PORTB &= ~(1 << PB5)
#define Read_24L01_MOSI PINB & (1 << PB5)
//#define NRF24L01_SCK PB7 //输出1
#define Hign_24L01_SCK PORTB |= (1 << PB7)
#define Low_24L01_SCK PORTB &= ~(1 << PB7)
#define Read_24L01_SCK PINB & (1 << PB7);
//#define NRF24L01_CSN PB4 //输出1
#define Low_24L01_CSN PORTB &= ~(1 << PB4)
#define Hign_24L01_CSN PORTB |= (1 << PB4)
//#define NRF24L01_CE PB2 //输出1
#define Hign_24L01_CE PORTB |= (1 << PB3)
#define Low_24L01_CE PORTB &= ~(1 << PB3)
#define Read_24L01_CE PINB & (1 << PB3)
//char sta,count,tf;
/
/
/
void spi_init()
{
DDR_SPI = (1<<DD_MOSI)|(1<<DD_SCK)|(1<<DD_SS)|(1 << PB3);//设置MOSI,SCK,SS.CE 为OUTPUT,其它为INPUT
SPCR=(1<<SPE)|(1<<MSTR)|(1<<SPR0);//使能SPI接口,主机模式,MSB低位在前,模式0,16分频,SPI时钟1MHZ
SPSR=0;
}
uchar SPI_RW(uchar date)
{
SPDR=date;
while(!(SPSR&(1<<SPIF)));
return SPDR;
}
uchar SPI_Read(uchar reg)
{
uchar reg_val;
Low_24L01_CSN; // CSN low, initialize SPI communication...
SPI_RW(reg); // Select register to read from..
reg_val = SPI_RW(0); // ..then read registervalue
Hign_24L01_CSN; // CSN high, terminate SPI communication
return(reg_val); // return register value
}
uchar SPI_RW_Reg(uchar reg, uchar value)
{
uchar status;
Low_24L01_CSN; // CSN low, init SPI transaction
status = SPI_RW(reg); // select register
SPI_RW(value); // ..and write value to it..
Hign_24L01_CSN; // CSN high again
return(status); // return nRF24L01 status uchar
}
uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bites)
{
uint status1,uchar_ctr;
Low_24L01_CSN; // Set CSN low, init SPI tranaction
status1 = SPI_RW(reg); // Select register to write to and read status uchar
for(uchar_ctr=0;uchar_ctr<bites;uchar_ctr++)
pBuf[uchar_ctr] = SPI_RW(0); //
Hign_24L01_CSN;
return(status1); // return nRF24L01 status uchar
}
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<bites; uchar_ctr++) //
SPI_RW(*pBuf++);
Hign_24L01_CSN; //关闭SPI
return(status1); //
}
void SetRX_Mode(void)
{
Low_24L01_CE;
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH);
SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); //
SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); //
SPI_RW_Reg(WRITE_REG + RF_CH,0); //
SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH);
SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07);
SPI_RW_Reg(WRITE_REG + CONFIG, 0x0f);
Hign_24L01_CE;
Delay(200);//注意不能太小
}
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; //SPI使能
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)
{
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, 0x1a); //
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
Hign_24L01_CE; //置高CE，激发数据发送
Delay(150);
}
/
void init_NRF24L01(void)
{
spi_init();
Low_24L01_CE; // chip enable
Hign_24L01_CSN; // Spi disable
Low_24L01_SCK; // Spi clock line init high
}
主函数（发送）
//外部8MHZ晶振
#include <iom16v.h>
#include <macros.h>
#include"RF24L01.H"
#include"LCD1602.H"
uchar TX_BUF[32]={0x53,0x75,0x63,0x63,0x65,0x73,0x66,0x75,0x6c,0x21};//successful!
void main()
{
lcd_init();
init_NRF24L01();
LCD_write_str(0,0,"fa song shu ju:");
delay_ms(10);
while(1)
{
nRF24L01_TxPacket(TX_BUF);
delay_ms(50);
sta=SPI_Read(STATUS);
//while(sta&0x20)
//{
for(i=0;i<10;i++)
{
LCD_write_char(1,i,TX_BUF[i]);
}
SPI_RW_Reg(WRITE_REG+STATUS,0XFF);
//}
delay_ms(500);
}
}
主函数（接收）
#include <iom16v.h>
#include <macros.h>
#include"RF24L01.H"
#include"LCD1602.H"
#define mclk 8000000
#pragma interrupt_handler uart_rx:12
uchar RX_BUF[32];
uchar rdata,flag=0;
void main()
{
uchar i;
lcd_init();
init_NRF24L01();
LCD_write_str(0,0,"jie shou shu ju:");
delay_ms(10);
while(1)
{
SetRX_Mode();
if(nRF24L01_RxPacket(RX_BUF)) //判断是否收到数据
{
for(i=0;i<10;i++)
{
LCD_write_char(1,i,RX_BUF[i]);
delay_ms(1);
}
}
delay_ms(500);
}
}

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