射频通讯

void timer2_isr(void) interrupt 5
{
TF2H=0;
blevelValue=Data_315; //将端口值赋给blevelValue
if(boldlevel==blevelValue)
{
countRFkeep++;

}
else
{
keepLevelTime=countRFkeep;
countRFkeep=0;
boldlevel=~boldlevel; //将新的端口值 付给boldlevel
bReceiveRF=1;
bmodulate=1;
data_boldlevel=boldlevel;//将新的端口值 付给data_boldlevel
data_keepLevelTime=keepLevelTime; //

}

}

/*********************************************
**定时器2 实现240us 定时 要发送的数据 位宽为240us 经过曼码编码之后 位宽为120us
*******************************************/

void RFReceive(void)
{
if((keepLevelTime>=3)&&(keepLevelTime<=8))
{
saveHead<<=1;
saveHead|=~boldlevel;

}

else if((keepLevelTime>=10)&&(keepLevelTime<=14))//
{
saveHead<<=1;
saveHead|=~boldlevel;
saveHead<<=1;
saveHead|=~boldlevel;
if((saveHead&0xffffffff)==0xaaaaaaab)
{
bRxHead=1;
rxRFBuf[0] =0x03;
data_countRxbit=0;
ucmodulate=0; //315
}

}


}

void main (void)
{
if( bReceiveRF=1)
{ RFReceive();
bReceiveRF=0;
}

}
我不明白接收函数为什么要这么写 希望高手指点 发送数据为5个字节的0x00.和0x4c