// 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;
}
}
void SelfSend()
{
sPacketbuf[DES_NUM] = SELFADDRESS;
sPacketbuf[SRC_NUM] = SELFADDRESS;
CC2500_SeleChannel(12);
CC2500_SetRecvAddr(SELFADDRESS);
CC2500_SetRxd();
CC2500_SendPacket(sPacketbuf,PACKET_LEN);
CC2500_SetRxd();
sPacketbuf[DES_NUM]=0x00;
}
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;
}
}
void CC2500_SetRecvAddr(CC2500_RECV_ADDR AddrMode,u8 SpecAddr)
{
CC2500_WriteReg(CCxxx0_ADDR,SpecAddr);
CC2500_WriteReg(CCxxx0_PKTCTRL1,AddrMode);//地址检查寄存器
CC2500_SetRxd();
}
// 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
}
/* This function runs before the OS start. */
void NetworkConnecting()
{
int i, p, test, test1;
int sendcounter = 0;
u32 *pu32 = NULL;
test1 = Timer2Counter;
test = Timer2Counter;
sPacketbuf[DES_NUM] = SELFADDRESS;
sPacketbuf[SRC_NUM] = SELFADDRESS;
CC2500_SeleChannel(0);
CC2500_SetRecvAddr(SELFADDRESS);
CC2500_SetRxd();
CC2500_SendPacket(sPacketbuf,PACKET_LEN);
CC2500_SetRxd();
sPacketbuf[DES_NUM]=0x00;
NbrList[0]=NbrCount;
// while(RESET==RNG_GetFlagStatus(RNG_FLAG_DRDY));
// Delay_100us(RNG_GetRandomNumber() & 0x000000f);
pu32 = (u32*) &sPacketbuf[1];
while (0 == NodeFlag[SELFADDRESS])
{
if (ISIDLE)
{
NbrList[0] = NbrCount;
sPacketbuf[PRC_NUM] = DISCOVERY_MESSAGE;
arm_copy_q7(NbrList, sPacketbuf+LEN_NUM, NbrList[0]+1);
pu32[CRC_LENGTH - 2] = Timer2Counter;//Add the timestamp.
CRC_ResetDR();
pu32[CRC_LENGTH - 1] = CRC_CalcBlockCRC(pu32, CRC_LENGTH - 1);
p = Bernoulli(1.0/(MAXNUM-NbrCount+1));
//Delay_100us(1);
if (ISIDLE)
{
if (0 == DelayFlag)
{
if (p/*Bernoulli(1.0/(MAXNUM-NbrCount+1))*/)
{
CC2500_SendPacket(sPacketbuf, PACKET_LEN);
CC2500_SetRxd();
DelayFlag=1;
}
}
else
{
Preemptive_Delay_100us(25, &DelayFlag);
DelayFlag=0;
}
}
}
}
test1 = Timer2Counter - test1;
while(MAXNUM > NbrCount)
{
if (0 != DiscoveryHelp)
{
if (ISIDLE)
{
Delay_100us(1);
if (ISIDLE)
{
if (Bernoulli(1.0/(MAXNUM-NbrCount+1)))
{
NbrList[0] = NbrCount;
sPacketbuf[PRC_NUM] = DISCOVERY_MESSAGE;
arm_copy_q7(NbrList, sPacketbuf+LEN_NUM, NbrList[0]+1);
pu32[CRC_LENGTH - 2] = Timer2Counter;//Add the timestamp.
CRC_ResetDR();
pu32[CRC_LENGTH - 1] = CRC_CalcBlockCRC(pu32, CRC_LENGTH - 1);
CC2500_SendPacket(sPacketbuf, PACKET_LEN);
CC2500_SetRxd();
}
}
}
DiscoveryHelp = 0;
}
}
test = Timer2Counter - test;
while(RESET==RNG_GetFlagStatus(RNG_FLAG_DRDY));
Delay_100us(RNG_GetRandomNumber() & 0x000000f);
pu32[CRC_LENGTH - 2] = Timer2Counter;//Add the timestamp.
sendcounter = 3;
while (0 != sendcounter)
{
if (ISIDLE)
{
Delay_100us(1);
if (ISIDLE)
{
NbrList[0] = NbrCount;
sPacketbuf[PRC_NUM] = DISCOVERY_ACCOMPLISHED;
arm_copy_q7(NbrList, sPacketbuf+LEN_NUM, NbrList[0]+1);
CRC_ResetDR();
pu32[CRC_LENGTH - 1] = CRC_CalcBlockCRC(pu32, CRC_LENGTH - 1);
CC2500_SendPacket(sPacketbuf, PACKET_LEN);
CC2500_SetRxd();
sendcounter--;
}
}
Delay_100us(10);
}
printf("NeighbourList:\r\n");
for (i=0;i<MAXNUM;i++)
{
printf("%#x\r\n",NbrList[1+i]);
}
printf("t1 = %d\r\n", test1);
printf("t = %d\r\n", test);
}
bool CC2500_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
u8 i = 0;
u16 Id;
//CS
GPIO_InitStructure.GPIO_Pin = CC_CS_IO_PIN;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(CC_CS_IO_GROUP, &GPIO_InitStructure);
SPI2_Init();
CC2500_Reset();
if((Id=CC2500_GetChipId())!=0x8003)
{
Debug("Error CC2500 ID: %04x\n\r",Id);
return FALSE;
}
CC2500_RfSettings();
CC2500_Select();
CC2500_WriteByte(CCxxx0_PATABLE|WRITE_BURST);
for(i=0;i<8;i++)
{
CC2500_WriteByte(paTable_CC2500[i]);
}
CC2500_NoSelect();
CC2500_SetRxd();
//GDO0
GPIO_InitStructure.GPIO_Pin = CC_GDO0_IO_PIN;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(CC_GDO0_IO_GROUP, &GPIO_InitStructure);
#if QXW_LCM_ID == 210 || QXW_LCM_ID == 211 || QXW_LCM_ID == 220 || QXW_LCM_ID == 221
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = EXTI3_IRQn_Priority;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE
NVIC_Init(&NVIC_InitStructure);
EXTI_InitStructure.EXTI_Line = EXTI_Line3; //外部中断线 ，使用第2根
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //中断模
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//中断触发方式
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //打开中断
EXTI_Init(&EXTI_InitStructure); //调用库函数给寄存器复制
CC2500_InterruptEnable(FALSE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource3);
#elif QXW_LCM_ID == 212
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = EXTI9_5_IRQn_Priority;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE
NVIC_Init(&NVIC_InitStructure);
EXTI_InitStructure.EXTI_Line = EXTI_Line6; //外部中断线 ，使用第2根
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //中断模
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//中断触发方式
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //打开中断
EXTI_Init(&EXTI_InitStructure); //调用库函数给寄存器复制
CC2500_InterruptEnable(FALSE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource6);
#endif
return TRUE;
}
