基於51微控制器的NRF905收發程式
程式簡介:該程式能同時進行接收和傳送功能,可以實現兩塊微控制器互相通訊。實現的效果:能控制P0口的4個燈,並簡單驅動蜂鳴器發聲。
#include <reg52.h>
#include <ABSACC.h>#include <intrins.h>
#include <stdio.h>
//----------------------------------------------------------------------------------------------------------------
#define uint unsigned int
#define uchar unsigned char
//----------------------------------------------------------------------------------------------------------------
#define BYTE_BIT00x01
#define BYTE_BIT10x02
#define BYTE_BIT20x04
#define BYTE_BIT30x08
#define BYTE_BIT40x10
#define BYTE_BIT50x20
#define BYTE_BIT60x40
#define BYTE_BIT70x80
//----------------------------------------------------------------------------------------------------------------
bdata unsigned char DATA_BUF;
#define DATA7((DATA_BUF&BYTE_BIT7) != 0)
#define DATA0 ((DATA_BUF&BYTE_BIT0) != 0)
sbitflag =DATA_BUF^7;
sbitflag1 =DATA_BUF^0;
//---------------------------------------------------傳送資料緩衝區-------------------------------------------------
#define TxRxBuf_Len 4
unsigned char TxRxBuf[TxRxBuf_Len]=
{
0x29,0x30,0x31,0x32,
};
//----------------------------------------------NRF905控制IO------------------------------------------------------
sbitTXEN=P2^4;
sbitTRX_CE=P2^0;
sbitPWR=P3^4;
//----------------------------------------------NRF905 SPI介面---------------------------------------------------
sbitMISO=P2^2;
sbitMOSI=P2^6;
sbitSCK=P2^3;
sbitCSN=P2^7;
//----------------------------------------nrf905狀態標誌---------------------------------------------------------
sbitAM=P2^1;
sbitDR=P3^5;
sbitCD=P2^5;
//---------------------------------------------------------------------------------------------------------------
sbitled3=P0^3;
sbitled2=P0^2;
sbitled1=P0^1;
sbitled0=P0^0;
//------------------------------------------按鍵定義--------------------------------------------------------------------
sbit KEY0 =P3^2;
sbit KEY1 =P3^3;
/*/----------------------------------------------NRF905控制IO------------------------------------------------------
sbitTXEN=P1^0;
sbitTRX_CE=P3^2;
sbitPWR=P1^1;
//----------------------------------------------NRF905 SPI介面---------------------------------------------------
sbitMISO=P1^6;
sbitMOSI=P1^5;
sbitSCK=P1^7;
sbitCSN=P1^3;
//----------------------------------------nrf905狀態標誌---------------------------------------------------------
sbitAM=P1^4;
sbitDR=P3^3;
sbitCD=P1^2;
//---------------------------------------------------------------------------------------------------------------
sbitled3=P2^0;
sbitled2=P2^1;
sbitled1=P2^2;
sbitled0=P2^3;
//--------------------------------------------------------------------------------------------------------------
sbitKEY0=P3^6;
sbitKEY1=P3^7;
//--------------------------------------------------------------------------------
*/
sbitBELL=P1^0;
//-----------------------------------------------------------------------------------------------------------------
//uchar seg[10]={0xC0,0xCF,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90}; //0~~9段碼
//-------------------------------------------------------nrf905控制指令-------------------------------------------
#define WC0x00
#define RC0x10
#define WTP0x20
#define RTP0x21
#define WTA0x22
#define RTA0x23
#define RRP0x24
//------------------------------------------------NRF905暫存器配置------------------------------------------------
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,節電為正常模式
0x44, //地址寬度設定,為4位元組
0x04,0x04, //接收發送有效資料長度為4位元組
0xCC,0xCC,0xCC,0xCC, //接收地址
0x58, //CRC充許,8位CRC校驗,外部時鐘訊號不使能,16M晶振
};
code TxAddress[4]={0xcc,0xcc,0xcc,0xcc};
char tf;
//------------------------------------------------延時------------------------
static void Delay(uchar n)
{
uint i;
while(n--)
for(i=0;i<80;i++);
}
//---------------------------------------------------SPI讀函式-----------------------------------------------------
//------------------------------------------------蜂鳴器------------------------------------------------------------
void fengmingqi(void)
{
int i;
for(i=20;i>0;i--)
{
BELL = 1;
Delay(10);
BELL = 0;
Delay(10);
}
}
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,儲存至最末尾,通過左移位完成整個位元組
{
DATA_BUF|=BYTE_BIT0;
}
else
{
DATA_BUF&=~BYTE_BIT0;
}
SCK=0;
}
return DATA_BUF;
}
//-------------------------------------------------SPI寫函式----------------------------------------------------------
void SpiWrite(unsigned char send)
{
unsigned char i;
DATA_BUF=send;
for (i=0;i<8;i++)
{
if (DATA7) //總是傳送最高位
{
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=0;// Init DR for input
AM=0;// Init AM for input
CD=0;// Init CD for input
PWR=1; // nRF905 power on
TRX_CE=0; // Set nRF905 in standby mode
TXEN=0; // set radio in Rx mode
}
//-----------------------------------------------------初始化暫存器-----------------------------------------------
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[i]);
}
CSN=1; // Disable Spi
}
//-----------------------------------------------------傳送資料打包---------------------------------------------------
void TxPacket(uchar *TxRxBuf)
{
uchar i;
//Config905();
CSN=0;
SpiWrite(WTP);// Write payload command
for (i=0;i<4;i++)
{
SpiWrite(TxRxBuf[i]);// Write 32 bytes Tx data
}// Spi enable for write a spi command
CSN=1;
Delay(1); // Spi disable
CSN=0; // Spi enable for write a spi command
SpiWrite(WTA);// Write address command
for (i=0;i<4;i++)// Write 4 bytes address
{
SpiWrite(TxAddress[i]);
}
CSN=1; // Spi disable
TRX_CE=1; // Set TRX_CE high,start Tx data transmission
Delay(1); // while (DR!=1);
TRX_CE=0; // Set TRX_CE low
}
//----------------------------------------------------------設定傳送狀態---------------------------------------------
void SetTxMode(void)
{
TRX_CE=0;
TXEN=1;
Delay(1); // delay for mode change(>=650us)
}
//-----------------------------------------------設定傳送狀態---------------------------------------------------
void SetRxMode(void)
{
TXEN=0;
TRX_CE=1;
Delay(1); // delay for mode change(>=650us)
}
//-------------------------------------------------判斷資料接收狀態-----------------------------------------------------
unsigned char CheckDR(void)//檢查是否有新資料傳入 Data Ready
{
if (DR=1&&TRX_CE==1 && TXEN==0)
{
// Delay(50) ;
return 1;
}
else
{
return 0;
}
}
//----------------------------------------------------讀NRF905接收資料------------------------------------------------------------
void RxPacket(void)
{
uchar i;
Delay(1);
//TRX_CE=0; // Set nRF905 in standby mode
Delay(100);
TRX_CE=0;
CSN=0; // Spi enable for write a spi command
Delay(1);
SpiWrite(RRP);
for (i = 0 ;i < 4 ;i++)
{
TxRxBuf[i]=SpiRead();// Read data and save to buffer
}
CSN=1;
Delay(10);
TRX_CE=1;
}
//--------------------------------------------------------資料接收------------------------------------------------
void RX(void)
{
SetRxMode();// Set nRF905 in Rx mode
while (CheckDR()==0);
Delay(10);
RxPacket();
if(TxRxBuf[0]==0x29)
{
led0=1;
led1=1;
led2=1;
led3=1;
}
if(TxRxBuf[0]==0x30)
{
led0=0;
led1=0;
led2=0;
led3=0;
fengmingqi();
}
}
//-----------------------------------------------------------------------------------------------------------------
void main(void)
{
nRF905Init();
Config905();
led0=1;
led1=1;
led2=1;
led3=1;
while(1)
{
RX();
if(KEY0 ==0 )
{
tf = 1 ;
TxRxBuf[0]=0x29;
//TxRxBuf[1]=0x30;
//TxRxBuf[2]=0x31;
//TxRxBuf[3]=0x32;
led0=0;
led1=1;
led2=0;
led3=1;
}
if(KEY1 ==0 )
{tf = 1 ;
TxRxBuf[0]=0x30;
//TxRxBuf[1]=0x31;
//TxRxBuf[2]=0x32;
//TxRxBuf[3]=0x29;
led0=1;
led1=0;
led2=1;
led3=0;
}
if (tf==1)
{
SetTxMode();// Set nRF905 in Tx mode
TxPacket(TxRxBuf);// Send data by nRF905
tf = 0;
}
}
}