bool CC2500_PacketCheck()
{
u8 i;
u32 *pu32 = NULL;
RSSI = CC2500_ReadStatus(CCxxx0_RSSI);
LQI = CC2500_ReadStatus(CCxxx0_LQI);
CC2500_ReceivePacket(gPacketbuf);
ReceiveTime = Timer2Counter;
CC2500_SetRxd();
pu32 = (u32*) &gPacketbuf[1];
CRC_ResetDR();
if (CRC_CalcBlockCRC(pu32, CRC_LENGTH - 1) == pu32[CRC_LENGTH - 1])
{
if (NodeTimestamp[gPacketbuf[SRC_NUM]] != pu32[CRC_LENGTH - 2])
{
NodeTimestamp[gPacketbuf[SRC_NUM]] = pu32[CRC_LENGTH - 2];
return TRUE;
}
else
{
return FALSE;
}
}
else
{
return FALSE;
}
}
// receive a paket data form cc2500
u8 CC2500_ReceivePacket(u8 *rxBuffer)
{
u8 status;
u8 LEN=0,i=0;
status =CC2500_ReadStatus(CCxxx0_RXBYTES); //RX FIFO 等于0 CRC校验失败 如果大于0CRC校验OK数据能读出
if((status & 0x7F)==0x00)
{
status = CC2500_ReadStatus(CCxxx0_MARCSTATE);
if((status!=0x0D)&&(status!=0x08)) //0x0D为RX状态
{
CC2500_SetRxd(); //激活（接收或传送）
}
return 0;
}
//LEN = CC2500_ReadReg(CCxxx0_RXFIFO_one);
LEN = PACKET_LEN; //采用定长模式
if(LEN > 0)
{
if(LEN<=RFTXDBUFFSIZE)
{
CC2500_Select();
CC2500_WriteByte(CCxxx0_RXFIFO_Muti);
for(i=0;i<LEN;i++)
{
rxBuffer[i] = CC2500_ReadByte();
}
CC2500_NoSelect();
CC2500_SetRxd();
return LEN;//(status & CRC_OK);
}
else
{
CC2500_Select();
CC2500_WriteByte(CCxxx0_RXFIFO_Muti);
for(i=0;i<LEN;i++)
{
rxBuffer[i] = CC2500_ReadByte();
}
CC2500_NoSelect();
CC2500_SetRxd();
return 0;
}
}
else
{
CC2500_SetRxd();
return 0;
}
}
// rf communication
void CC2500_Process(void)
{
u8 i,j;
#define GDO0_
#ifdef GDO0_
if(!GDO0_IN())
{
return;
}
while(GDO0_IN());
#else
if(!(CC2500_ReadStatus(0x38)&0x01))
{
return;
}
while((CC2500_ReadStatus(0x38)&0x01));
#endif
Debug("Have a packet!\n\r");
i = CC2500_ReadRSSIValue();
for(i=0;i<sizeof(bTempBuf);i++) bTempBuf[i]=0;
CC2500_ReceivePacket(bTempBuf);
Debug("Receive over!\n\r");
CC2500_SetRxd();
// CC2500_REnter_WOR();
#if 1//def RF_DEBUG_
Debug("\n\rRX Data:");
for(j=0;j<sizeof(bTempBuf);j++)
{
Debug("0x%x ",bTempBuf[j]);
}
Debug("\n\r");
#endif
}
//read RSSI value
u8 CC2500_ReadRSSIValue(void)
{
return(CC2500_ReadStatus(0x34));
}
