PM8621 datasheet(152/184 Pages) PMC

152 / 184 page

NSE-8G™ Standard Product Data Sheet

Preliminary

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

151

Document ID: PMC-2010850, Issue 1

Get the MSG_LVL

rd(RX_STTS);

WHILE rx_stts_valid = '0' LOOP

rd(RX_STTS);

END LOOP;

msg_lvl_loop := rx_msg_lvl;

Now Check the RX_SYNC_DONE status to be sure we're not going to skip

the 1st message...

IF rx_sync_done = '0' THEN

Do the RX_XFER_SYNC

wr(RX_STTS, "00000000000000000000000000000001");

Poll the RX_FI_BUSY bit

rd(RX_STTS);

WHILE rx_fi_busy = '1' LOOP

rd(RX_STTS);

END LOOP;

END IF;

Next RX MSG Buffer is now synched and we know how many messages we have.

Just read the messages out.

msgs_rd := 0;

tst_report("Processing " & to_str(msg_lvl_loop) & " messages.");

WHILE msgs_rd < msg_lvl_loop LOOP

-- Loop on read value of rx_msg_lvl

Check the CRC_ERR bit for this message

rd(RX_STTS);

rxmsg.crc_err := crc_err_reg;

---

Simulation Stuff

This code skips errored messages.

WHILE crc_err_reg = '1' AND rndm_skip_msg_mode LOOP

tst_report("Errored message received and being skipped...");

IF rx_sync_done = '1' THEN

wr(RX_STTS, "00000000000000000000000000000001");

ELSE

-- We're in this loop 2nd time without a good msg inbetween. Need 2

-- RX_XFER_SYNC writes to do a message skip

wr(RX_STTS, "00000000000000000000000000000001");

Poll the bit here before starting next message.

rd(RX_STTS);

WHILE rx_fi_busy = '1' LOOP

rd(RX_STTS);

END IF;

rx_msg_cnt_o <= rx_msg_cnt_o + 1;

msgs_rd := msgs_rd + 1;

PM8621 Datasheet(PDF) 152 Page - PMC-Sierra, Inc

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