用nRF905和DS18B20制作的51單片機溫度數(shù)據(jù)無線傳輸系統(tǒng)

void main()

{

unsigned int cyc=0;

unsigned int distan=0;

//================NRF905初始化

CSN=1;// Spidisable

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

//================

Config905();// Config nRF905 module

TxBuf[0] = 1;

TxBuf[1] = 1;

SetTxMode();// Set Tx Mode

TxPacket();// Transmit Tx buffer data

LED1 = 0;

LED2 = 0;

Delay(500);// delay for led light

LED1 = 1;

LED2 = 1;

TxBuf[0] = 0xff;

TxBuf[1] = 0xff;

// led close

SetRxMode();// Set nRF905 in Rx mode

while(1)

{

//=====================從鍵盤獲得數(shù)據(jù)

if(KEY1 ==0 ) { LED1 = 0; TxBuf[0] = 1 ;tf = 1 ; }

if(KEY2 ==0 ) { LED2 = 0; TxBuf[1] = 1 ;tf = 1 ; }

if (tf==1)

{

//===============NRF905發(fā)送相應(yīng)的按鍵

SetTxMode();// Set Tx Mode

TxPacket();// Transmit Tx buffer data

TxBuf[0] = 0xff;

TxBuf[1] = 0xff;

SetRxMode();// Set nRF905 in Rx mode

tf=0;

Delay(500);

LED1 = 1;

LED2 = 1;

}

//=====================等待NRF905接收

if (DR)// If recive data ready...

RxPacket();// ... recive data

}

}

//function Config905();

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寫放配置字

{

SpiWrite(RxTxConf.buf[i]);

}

CSN=1;// Disable Spi

}

//function SpiWrite();

void SpiWrite(ucharbyte)

{

uchar i;

DATA_BUF=byte;// Put functions 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

}

}

//function SpiRead();

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

}

//function TxPacket();

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

}

//function RxPacket();

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);

// P0= RxBuf[0];// Buffer[0] output from P0 port...

TRX_CE=1;

//xx=(RxBuf[0]>>4)&0x0f;

//TxData(xx);

//=====================

if(RxBuf[0] == 1) LED1 = 0 ;

if(RxBuf[1] == 1) LED2 = 0 ;

Delay(500);// ...light led

// P0=0xff;// Close led

LED1 = 1 ;

LED2 = 1 ;

}

//function SetTxMode();

void SetTxMode(void)

{

TX_EN=1;

TRX_CE=0;

Delay(1);// delay for mode change(>=650us)

}

//function SetRxMode();

void SetRxMode(void)

{

TX_EN=0;

TRX_CE=1;

Delay(1);// delay for mode change(>=650us)

}****************************************