// set data packet without crc16
static void Dot11BPreparePacket(const Config& config, PVOID pSymbolBuffer, ULONG SymbolBufferSize)
{
ULONG i;
PUCHAR pbIn = DataBuffer;
unsigned int dataSize = config.GetPayloadLength();
assert(DataBufferSize >= dataSize + 4);
for (i = 0; i < dataSize; i++)
{
*pbIn = 'B';
pbIn++;
}
PDOT11RFC1042ENCAP pWlanHeader = (PDOT11RFC1042ENCAP)DataBuffer;
pWlanHeader->MacHeader.FrameControl.Type = FRAME_DATA;
*(PULONG)pbIn = CalcCRC32(DataBuffer, dataSize);
Mdl.Next = NULL;
Mdl.StartVa = (PULONG)DataBuffer;
Mdl.ByteOffset = 0;
Mdl.MappedSystemVa = (PULONG)DataBuffer;
Mdl.ByteCount = dataSize;
Packet.pMdl = &Mdl;
Packet.PacketSize = dataSize;
Packet.pReserved = pSymbolBuffer;
Packet.Reserved2 = SymbolBufferSize;
Packet.Reserved1 = *(PULONG)(DataBuffer + dataSize);
TxVector.DateRate = Dot11BDataRate_Kbps2Code(config.GetDataRate());
TxVector.PreambleType = DOT11B_PLCP_IS_LONG_PREAMBLE;
}
int TestMod11B(PDOT11_MOD_ARGS pArgs)
{
MDL Mdl;
PACKET_BASE Packet;
DOT11B_PLCP_TXVECTOR Dot11BTxVector;
Dot11BTxVector.PreambleType = DOT11B_PLCP_IS_LONG_PREAMBLE;
Dot11BTxVector.ModSelect = DOT11B_PLCP_IS_CCK;
if (!Dot11BRate_KbpsValid(pArgs->nBitRate))
{
printf("Data rate %d kbps is not supported by 802.11b mode\n", pArgs->nBitRate);
return -1;
}
Dot11BTxVector.DateRate = Dot11BDataRate_Kbps2Code(pArgs->nBitRate);
// Measure modulation speed
const int RUN_TIMES = 100;
ULONGLONG ts1 = SoraGetCPUTimestamp ( &tsinfo );
for (int ii = 0; ii < RUN_TIMES; ii++)
{
if (PreparePacket(pArgs->pcInFileName, &Mdl, &Packet, DataBuffer, (PUCHAR)SymbolBuffer, SAMPLE_BUFFER_SIZE) < 0)
return -1;
// Note: BB11BPMDPacketGenSignal() will modify Packet.pMdl and Packet.pReserved (data crc)
// so if run multiple times, please reload these data before calling it.
BB11BPMDPacketGenSignal(&Packet, &Dot11BTxVector, (PUCHAR)TempBuffer, sizeof(TempBuffer)/sizeof(COMPLEX8));
}
ULONGLONG ts2 = SoraGetCPUTimestamp ( &tsinfo );
printf("Signal data rate: %d kbps\n", Dot11BDataRate_Code2Kbps(Dot11BTxVector.DateRate));
printf("Signal packet size: %d\n", Packet.PacketSize);
printf("Signal encoded size: %d\n", Packet.Reserved3);
printf("Time cost average: %.3f us \n", SoraTimeElapsed (ts2-ts1, &tsinfo) * 1.0 / 1000 / RUN_TIMES);
FILE* pOut = NULL;
#pragma warning (push)
#pragma warning (disable:4996)
pOut = fopen(pArgs->pcOutFileName, "w+b");
#pragma warning (pop)
if (!pOut)
{
printf("Cannot create output file.\n");
return -1;
}
fwrite(Packet.pReserved, Packet.Reserved3, 1, pOut);
fclose(pOut);
return 0;
}
