?? nrf905.c
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#include<at89x51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define WC 0x00 // Write configuration register command
#define RC 0x10 // Read configuration register command
#define WTP 0x20 // Write TX Payload command
#define RTP 0x21 // Read TX Payload command
#define WTA 0x22 // Write TX Address command
#define RTA 0x23 // Read TX Address command
#define RRP 0x24 // Read RX Payload command
typedef struct RFConfig
{
uchar n;
uchar buf[10];
}RFConfig;
code RFConfig RxTxConf =
{
10,
0x4c, 0x0c, 0x44, 0x20, 0x20, 0xcc, 0xcc, 0xcc,0xcc, 0x58
};
uchar data TxBuf[32];
uchar data RxBuf[32];
uchar key,rsbrf,delayf,tf;
uchar bdata DATA_BUF;
sbit flag =DATA_BUF^7;
sbit flag1 =DATA_BUF^0;
sbit TX_EN =P2^0;
sbit TRX_CE =P2^1;
sbit PWR_UP =P2^2;
sbit MISO =P2^6;
sbit MOSI =P2^7;
sbit SCK =P3^2;
sbit CSN =P3^3;
sbit AM =P3^5;
sbit DR =P2^5;
sbit CD =P2^4;
void InitIO(void); // Initialize IO port
void Inituart(void); // initialize 232 uart
void Config905(void); // Config nRF905 module配置NRF905模式
void SetTxMode(void); // Set nRF905 in Tx mode
void SetRxMode(void); // Set nRF905 in Rx mode
void TxPacket(void); // Send data by nRF905
void RxPacket(void); // Recive data by nRF905
void SpiWrite(uchar); // Write data to nRF905
uchar SpiRead(void); // Read data to nRF905
void Delay(uchar n); // Delay 100us
void Scankey(void); // Scan key
void TxData (uchar x); // Send key_value to CRT display
void comdebug(void);
void TxData (unsigned char x)
{
SBUF=x;
while(TI==0);
TI=0;
}
void Delay(uchar n)
{
uint i;
while(n--)
for(i=0;i<80;i++);
}
void serial () interrupt 4
{
unsigned char temp;
if(RI)
{
temp=SBUF;
rsbrf=temp;
RI=0;
}
}
void main()
{
unsigned int cyc=0;
unsigned int distan=0;
SCON=0x50; //模式1
TMOD=0x21; //定時模式2
IE=0x90; //=====9600=======設置串口通訊寄存器
TH1=0xFD;
TL1=0xFD; //計數器初值
//================NRF905初始化
CSN=1; // Spi disable
SCK=0; // Spi clock line init high
DR=1; // Init DR for input
AM=1; // Init AM for input
PWR_UP=1; // nRF905 power on
TRX_CE=0; // Set nRF905 in standby mode
TX_EN=0; // set radio in Rx mode
TI = 0; //串行中斷標志位清零
TR1 = 1; //打開計數器1
//================
Config905(); // Config nRF905 module
SetTxMode(); // Set Tx Mode
TxPacket(); // Transmit Tx buffer data
P0=0x00;
Delay(500); // delay for led light
P0=0xff; // led close
SetRxMode(); // Set nRF905 in Rx mode
while(1)
{
//=====================從鍵盤獲得數據
switch(P1)
{
case 0xfe:P1=0xef;TxBuf[0]=0xef;tf=1;break;
case 0xfd:P1=0xdf;TxBuf[0]=0xdf;tf=1;break;
case 0xfb:P1=0xbf;TxBuf[0]=0xbf;tf=1;break;
case 0xf7:P1=0x7f;TxBuf[0]=0x7f;tf=1;break;
default:P0=0xff;TxBuf[0]=0xff;
}
if (tf==1)
{
switch(TxBuf[0])
{
case 0xef:TxData('A');break;
case 0xdf:TxData('B');break;
case 0xbf:TxData('C');break;
case 0x7f:TxData('D');break;
default:P0=0xff;TxBuf[0]=0xff;
}
SetTxMode(); // Set Tx Mode
TxPacket(); // Transmit Tx buffer data
TxBuf[0] = 0xff;
SetRxMode(); // Set nRF905 in Rx mode
tf=0;
Delay(500);
P1=0xff;
}
//=====================等待NRF905接收
if (DR) // If recive data ready...
RxPacket(); // ... recive data
//=====================從串口接收到數據
if (rsbrf!=0)
{
switch(rsbrf)
{
case 'A':P1=0xef;TxBuf[0]=0xef;delayf=1;break;
case 'B':P1=0xdf;TxBuf[0]=0xdf;delayf=1;break;
case 'C':P1=0xbf;TxBuf[0]=0xbf;delayf=1;break;
case 'D':P1=0x7f;TxBuf[0]=0x7f;delayf=1;break;
default:P0=0xff;TxBuf[0]=0xff;
}
//====================NRF905發送串口接收到的相應的字符
if(TxBuf[0]!=0xff)
if(TxBuf[0]!=0x00)
{
SetTxMode(); // Set Tx Mode
TxPacket(); // Transmit Tx buffer data
TxBuf[0] = 0xff;
SetRxMode(); // Set nRF905 in Rx mode
}
//=====================
if(delayf==1)
{
Delay(500);
delayf = 0 ;
P1 = 0xff ;
}
}
//=====================
if(rsbrf!=0)
{
TxData(rsbrf);
rsbrf = 0 ;
}
//=====================
}
}
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<RxTxConf.n;i++) // Write configration words 寫放配置字
{
SpiWrite(RxTxConf.buf[i]);
}
CSN=1; // Disable Spi
}
void SpiWrite(uchar byte)
{
uchar i;
DATA_BUF=byte; // Put function's parameter into a bdata variable
for (i=0;i<8;i++) // Setup byte circulation bits
{
if (flag) // Put DATA_BUF.7 on data line
MOSI=1;
else
MOSI=0;
SCK=1; // Set clock line high
DATA_BUF=DATA_BUF<<1; // Shift DATA_BUF
SCK=0; // Set clock line low
}
}
uchar SpiRead(void)
{
uchar i;
for (i=0;i<8;i++) // Setup byte circulation bits
{
DATA_BUF=DATA_BUF<<1; // Right shift DATA_BUF
SCK=1; // Set clock line high
if (MISO)
flag1=1; // Read data
else
flag1=0;
SCK=0; // Set clock line low
}
return DATA_BUF; // Return function parameter
}
void TxPacket(void)
{
uchar i;
//Config905();
CSN=0; // Spi enable for write a spi command
SpiWrite(WTP); // Write payload command
for (i=0;i<32;i++)
{
SpiWrite(TxBuf[i]); // Write 32 bytes Tx data
}
CSN=1; // Spi disable
Delay(1);
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(RxTxConf.buf[i+5]);
}
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
}
void RxPacket(void)
{
uchar i;
TRX_CE=0; // Set nRF905 in standby mode
CSN=0; // Spi enable for write a spi command
SpiWrite(RRP); // Read payload command
for (i=0;i<32;i++)
{
RxBuf[i]=SpiRead(); // Read data and save to buffer
}
CSN=1; // Disable spi
while(DR||AM);
P1= RxBuf[0]; // Buffer[0] output from P0 port...
TRX_CE=1;
//xx=(RxBuf[0]>>4)&0x0f;
//TxData(xx);
//=====================
switch(P1)
{
case 0xef:TxData('A');;break;
case 0xdf:TxData('B');;break;
case 0xbf:TxData('C');;break;
case 0x7f:TxData('D');;break;
//default:P0=0xff;TxBuf[0]=0xff;
}
//=====================
Delay(500); // ...light led
P1=0xff; // Close led
}
void SetTxMode(void)
{
TX_EN=1;
TRX_CE=0;
Delay(1); // delay for mode change(>=650us)
}
void SetRxMode(void)
{
TX_EN=0;
TRX_CE=1;
Delay(1); // delay for mode change(>=650us)
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