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/1. 程序分別下載到2個(gè)開發(fā)板，注意兩個(gè)板都要接上USB電源供電。
//2. 然后按S2后發(fā)送信息，發(fā)送完畢后蜂鳴器響一下，對(duì)方受到信息后同樣 響一下。
//3. 而且兩個(gè)開發(fā)板都可以做為發(fā)送和接收，一個(gè)做為發(fā)送，對(duì)應(yīng)另一即為接收,實(shí)現(xiàn)及時(shí)雙向通信。
//4. QX-MCS51開發(fā)板上最下角第一個(gè)按鍵
//
#include <reg52.h>
#include <ABSACC.h>
#include <intrins.h>
#include <stdio.h>
//----------------------------------------------------------------------------------------------------------------
#define uint unsigned int
#define uchar unsigned char
//----------------------------------------------------------------------------------------------------------------
#define BYTE_BIT0 0x01
#define BYTE_BIT7 0x80
//----------------------------------------------------------------------------------------------------------------
bdata unsigned char DATA_BUF;
#define DATA7 ((DATA_BUF&BYTE_BIT7) != 0)
#define DATA0 ((DATA_BUF&BYTE_BIT0) != 0)
sbit flag =DATA_BUF^7;
sbit flag1 =DATA_BUF^0;
//---------------------------------------------------發(fā)送數(shù)據(jù)緩沖區(qū)-------------------------------------------------
#define TxRxBuf_Len 4
unsigned char TxRxBuf[TxRxBuf_Len]={0x29,0x30,0x31,0x32,};
code TxAddress[4]={0xcc,0xcc,0xcc,0xcc};
char tf;
//----------------------------------------NRF905工作模式控制端口------------------------------------------------------
sbit TXEN=P1^0;
sbit TRX_CE=P3^2;
sbit PWR=P1^1;
//-------------------------------------------------------------------------------------------
sbit LED=P2^3; //蜂鳴器
//----------------------------------------NRF905 數(shù)據(jù)交換端口---------------------------------------------------
sbit MISO=P1^6;
sbit MOSI=P1^5;
sbit SCK=P1^7;
sbit CSN=P1^3;
//----------------------------------------nrf905狀態(tài)端口---------------------------------------------------------
sbit AM=P1^4;
sbit DR=P3^3;
sbit CD=P1^2;
//---------------------------------------------------------------------------------------------------------------
//----------------------------------------按鍵端口-------------------------------------------------------
sbit KEY=P3^0; //QX-MCS51開發(fā)板上左下角第一個(gè)按鍵
//----------------------------------------nrf905控制指令-------------------------------------------
#define WC 0x00
#define RC 0x10
#define WTP 0x20
#define RTP 0x21
#define WTA 0x22
#define RTA 0x23
#define RRP 0x24
//------------------------------------------------NRF905寄存器配置------------------------------------------------
unsigned char idata RFConf[11]=
{
0x00, //配置命令//
0x4c, //CH_NO,配置頻段在430MHZ
0x0c, //輸出功率為10db,不重發(fā)，節(jié)電為正常模式
0x44, //地址寬度設(shè)置，為4字節(jié)
0x04,0x04, //接收發(fā)送有效數(shù)據(jù)長(zhǎng)度為4字節(jié)
0xCC,0xCC,0xCC,0xCC, //接收地址
0x58, //CRC充許，8位CRC校驗(yàn)，外部時(shí)鐘信號(hào)不使能，16M晶振
};
//================================================延時(shí)===========================================================
void nrf905_Delay(int n)
{
uint i;
while(n--)
for(i=0;i<80;i++);
}
//=================================================SPI讀函數(shù)=======================================================
unsigned char SpiRead(void)
{
unsigned char j;
for (j=0;j<8;j++)
{
DATA_BUF=DATA_BUF<<1;
SCK=1;
if (MISO) //讀取最高位，保存至最末尾，通過左移位完成整個(gè)字節(jié)
{
DATA_BUF|=BYTE_BIT0;
}
else
{
DATA_BUF&=~BYTE_BIT0;
}
SCK=0;
}
return DATA_BUF;
}
//===========================================SPI寫函數(shù)===============================================================
void SpiWrite(unsigned char send)
{
unsigned char i;
DATA_BUF=send;
for (i=0;i<8;i++)
{
if (DATA7) //總是發(fā)送最高位
{
MOSI=1;
}
else
{
MOSI=0;
}
SCK=1;
DATA_BUF=DATA_BUF<<1;
SCK=0;
}
}
//------------------------------------------------------初始化nRF905---------------------------------------------
void nRF905Init(void)
{
CSN=1; // Spi disable
SCK=0; // Spi clock line init low
DR=1; // Init DR for input
AM=1; // Init AM for input
CD=1; // Init CD for input
PWR=1; // nRF905 power on
TRX_CE=0; // Set nRF905 in standby mode
TXEN=0; // set radio in Rx mode
}
//-----------------------------------------------------初始化寄存器-----------------------------------------------
void Config905(void)
{
uchar i;
CSN=0; // Spi enable for write a spi command
//SpiWrite(WC); // Write config command寫放配置命令
for (i=0;i<11;i++) // Write configration words 寫放配置字
{
SpiWrite(RFConf);
}
CSN=1; // Disable Spi
}
//-----------------------------------------------------發(fā)送數(shù)據(jù)打包---------------------------------------------------
void TxPacket(uchar *TxRxBuf)
{
uchar i;
//Config905();
CSN=0;
SpiWrite(WTP); // Write payload command
for (i=0;i<4;i++)
{
SpiWrite(TxRxBuf); // Write 32 bytes Tx data
}
CSN=1;
nrf905_Delay(1); // Spi disable
CSN=0; // Spi enable for write a spi command
SpiWrite(WTA); // Write address command
for (i=0;i<4;i++) // 寫入與對(duì)方地址一樣的地址
{
SpiWrite(TxAddress);
}
CSN=1; // Spi disable
TRX_CE=1; // Set TRX_CE high,start Tx data transmission
nrf905_Delay(1); // while (DR!=1);
TRX_CE=0; // Set TRX_CE low
}
//----------------------------------------------設(shè)置發(fā)送初始狀態(tài)---------------------------------------------
void SetTxMode(void)
{
TRX_CE=0;
TXEN=1;
nrf905_Delay(1); // nrf905_Delay for mode change(>=650us)
}
//-----------------------------------------------設(shè)置接收初始化---------------------------------------------------
void SetRxMode(void)
{
TXEN=0;
TRX_CE=1;
nrf905_Delay(1); // nrf905_Delay for mode change(>=650us)
}
//-------------------------------------------------判斷數(shù)據(jù)接收狀態(tài)-----------------------------------------------------
unsigned char CheckDR(void) //檢查是否有新數(shù)據(jù)傳入 Data Ready
{
DR=1;
//通過對(duì)端口寫1，可以使端口為輸入狀態(tài)，這51的 特性。不熟悉者可以參閱51相關(guān)書籍作證(將DR端口設(shè)置為輸入狀態(tài)。)
if (DR==1)
{
DR=0;
return 1;
}
else
{
return 0;
}
}
//----------------------------------------------------讀NRF905接收數(shù)據(jù)------------------------------------------------------------
void RxPacket(void)
{
uchar i;
nrf905_Delay(1);
// TRX_CE=0; // Set nRF905 in standby mode
nrf905_Delay(100);
TRX_CE=0;
CSN=0; // Spi enable for write a spi command
nrf905_Delay(1);
SpiWrite(RRP);
for (i = 0 ;i < 4 ;i++)
{
TxRxBuf=SpiRead(); // Read data and save to buffer
}
CSN=1;
nrf905_Delay(10);
TRX_CE=1;
}
//--------------------------------------------------------數(shù)據(jù)接收------------------------------------------------
void RX(void)
{
SetRxMode();
// while (CheckDR()==0); 為了實(shí)現(xiàn)雙向通信，就不能一直處于接收等待狀態(tài)，所以注釋掉
nrf905_Delay(10);
RxPacket();
if(TxRxBuf[0]==0x29)
{
LED=0;
nrf905_Delay(300);
LED=1;
nrf905_Delay(300);//接收到數(shù)據(jù) 后閃爍
}
}
//-----------------------------------------------------------------------------------------------------------------
void main(void)
{
nRF905Init();
Config905();
LED=1;
while(1)
{
RX();
if(KEY ==0 )
{
while(KEY==0);
tf = 1 ;
TxRxBuf[0]=0x29;
}
if (tf==1)
{
SetTxMode();
TxPacket(TxRxBuf); // 發(fā)送命令數(shù)據(jù)
LED=0;
nrf905_Delay(300);
LED=1;
nrf905_Delay(300); //發(fā)送后蜂鳴器響一下
tf = 0;
}
}
}
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