/// <summary>
/// Encode beacon into frame
/// </summary>
/// <param name="frame">target frame</param>
/// <returns>True on success</returns>
public bool WriteToFrame(Frame frame)
{
int len = Length();
if (frame == null || frame.LengthDataAvail < len || frame.LengthDataUsed > 0)
return false;
if (payload != null)
len -= payload.LengthDataUsed;
frame.AllocBack(len);
int offset = 0;
// 7.2.2.1.2 Superframe Specification field
int i;
i = (beaconOrder & 0xf) |
((superframeOrder & 0xf) << 4) |
((finalCapSlot & 0xf) << 8) |
((batteryLifeExtension & 1) << 12) |
((panCoordinator & 1) << 14) |
((associationPermit & 1) << 15);
frame.Write(offset, (UInt16)i);
offset += 2;
// 7.2.2.1.3 GTS Specification field
if (gtsLength > 7)
return false; // assert
i = (gtsLength & 7) |
((gtsPermit & 1) << 7);
frame.Write(offset, (Byte)i);
offset += 1;
// 7.2.2.1.4 GTS Directions field
if (gtsLength > 0)
{
i = (gtsDirectionsMask & 0x7F); // 7 bits
frame.Write(offset, (Byte)i);
offset += 1;
}
// 7.2.2.1.5 GTS List field
for (int k = 0; k < gtsLength; k++)
{
frame.Write(offset, gtsDescriptor[k].deviceShortAddr);
offset += 2;
i = (gtsDescriptor[k].gtsStartingSlot & 0xF) |
((gtsDescriptor[k].gtsLength & 0xF) << 4);
frame.Write(offset, (Byte)i);
offset++;
}
// 7.2.2.1.6 Pending Address Specification field
i = (pendingShort & 7) |
((pendingExt & 7) << 4);
frame.Write(offset, (Byte)i);
offset++;
// 7.2.2.1.7 Address List field
for (int k = 0; k < pendingShort; k++)
{
frame.Write(offset, shortAddrPending[k]);
offset += 2;
}
for (int k = 0; k < pendingExt; k++)
{
frame.Write(offset, extAddrPending[k]);
offset += 8;
}
// 7.2.2.1.8 Beacon Payload field
if (payload != null)
frame.WriteToBack(payload);
return true;
}
