NSE-8G™ Standard Product Data Sheet
Preliminary
tst_report("Executing Receive buffer resync " & "
following short message of length " &
to_str(dword_rd_cnt) & ".");
wr(RX_STTS, "00000000000000000000000000000001");
--
--
--
Poll the bit here before startiong next message.
rd(RX_STTS);
WHILE rx_fi_busy = '1' LOOP
rd(RX_STTS);
END LOOP;
END IF;
END LOOP;
--- Simulation Stuff
Check_Rx_Msg(Payload_Chk,No_Header_Chk); -- Check payload only.
rx_msg_cnt_o <= rx_msg_cnt_o + 1;
--- End Simulation Stuff
msgs_rd := msgs_rd + 1;
ELSE
--
msgs_rd = msg_lvl_loop
--
--
--
--
--
--
--
--
--
--
--
When we think we're done check that we really are.
Update the current value of RX_MSG_LVL. Allows for the case where a
message has arrived while processing.
At this point we have read all the messages we thought we had at the
start of the loop so whatever number is returned now is the number of
new messages receieved while we've been reading messages.
Unless we're running real slow this should only be 1 or 0.
We adjust our loop variable by this amount to keep the loop going
long enough to get the extra messages received.
rd(RX_STTS);
WHILE rx_stts_valid = '0' OR rx_fi_busy = '1' LOOP
rd(RX_STTS);
END LOOP;
IF rx_msg_lvl > 0 THEN
tst_report("Message(s) Received while processing messages");
END IF;
--
--
--
--
--
Note in this code I'm not checking for more messages received than
read. We'd be in real trouble in the system in this case! We
also can't get there in the sim!
msgs_rd := msgs_rd - rx_msg_lvl;
END IF;
END LOOP;
END Message_Receive;
12.12.3 Handling the Transmit Header
PAGE Bits
If the IPAGE bits are changed, they are not sent in the header bits until the next frame. They will
be continually sent for each message in subsequent frames until they change again.
USER, LINK and AUX Bits
When any of these bits change they are sent in the header bits of the next message. They will be
continually sent for each subsequent message until they change again.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
153
PMC [ PMC-SIERRA, INC ]
